Nearest neighbor: The low-mass Milky Way satellite Tucana III

Simon, J. D.; Li, T. S.; Drlica-Wagner, A.; Bechtol, K.; Marshall, J. L.; James, D. J.; Wang, M. Y.; Strigari, L.; Balbinot, E.; Kuehn, K.; Walker, A. R.; Abbott, T. M.  C.; Allam, S.; Annis, J.; Benoit-Lévy, A.; Brooks, D.; Buckley-Geer, E.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Cunha, C. E.; D’Andrea, C. B.; Costa, L. N.  da; DePoy, D. L.; Desai, S.; Doel, P.; Fernandez, E.; Flaugher, B.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Goldstein, D. A.; Gruen, D.; Gutierrez, G.; Kuropatkin, N.; Maia, M. A.  G.; Martini, P.; Menanteau, F.; Miller, C. J.; Miquel, R.; Neilsen, E.; Nord, B.; Ogando, R.; Plazas, A. A.; Romer, A. K.; Rykoff, E. S.; Sanchez, E.; Santiago, B.; Scarpine, V.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, R. C.; Sobreira, F.; Suchyta, E.; Swanson, M. E.  C.; Tarle, G.; Whiteway, L.; Yanny, B.

doi:10.3847/1538-4357/aa5be7

Title: Nearest neighbor: The low-mass Milky Way satellite Tucana III

Abstract

We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite Tucana III (Tuc III). We identify 26 member stars in Tuc III from which we measure a mean radial velocity of v (hel) = -102.3 ± 0.4 (stat.) ± 2.0 (sys.) $$\mathrm{km}\,{{\rm{s}}}^{-1}$$, a velocity dispersion of $${0.1}_{-0.1}^{+0.7}$$ $$\mathrm{km}\,{{\rm{s}}}^{-1}$$, and a mean metallicity of $${\rm{[Fe/H]}}=-{2.42}_{-0.08}^{+0.07}$$. The upper limit on the velocity dispersion is σ < 1.5 $$\mathrm{km}\,{{\rm{s}}}^{-1}$$ at 95.5% confidence, and the corresponding upper limit on the mass within the half-light radius of Tuc III is 9.0 × 10(4) M (⊙). We cannot rule out mass-to-light ratios as large as 240 M (⊙)/L (⊙) for Tuc III, but much lower mass-to-light ratios that would leave the system baryon-dominated are also allowed. We measure an upper limit on the metallicity spread of the stars in Tuc III of 0.19 dex at 95.5% confidence. Tuc III has a smaller metallicity dispersion and likely a smaller velocity dispersion than any known dwarf galaxy, but a larger size and lower surface brightness than any known globular cluster. Its metallicity is also much lower than those of the clusters with similar luminosity. We therefore tentatively suggest that Tuc III is the tidally stripped remnant of a dark matter-dominated dwarf galaxy, but additional precise velocity and metallicity measurements will be necessary for a definitive classification. If Tuc III is indeed a dwarf galaxy, it is one of the closest external galaxies to the Sun. Because of its proximity, the most luminous stars in Tuc III are quite bright, including one star at V = 15.7 that is the brightest known member star of an ultra-faint satellite.

Authors:

Simon, J. D.; Li, T. S.;

; Bechtol, K.;

; James, D. J.; Wang, M. Y.;

; Balbinot, E.; Kuehn, K.;

; Abbott, T. M. C.; Allam, S.;

; Benoit-Lévy, A.; Brooks, D.; Buckley-Geer, E.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco more »

Publication Date:: Fri Mar 17 00:00:00 EDT 2017

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: The DES Collaboration

OSTI Identifier:: 1349626

Alternate Identifier(s):: OSTI ID: 1368581; OSTI ID: 1390198

Report Number(s):: arXiv:1610.05301; FERMILAB-PUB-16-454-AE
Journal ID: ISSN 1538-4357; KJ0402000; KJ0503000; ERKJ311; ERKJEPM; TRN: US1700600

Grant/Contract Number:: AC05-00OR22725; AC02-76SF00515; AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: The Astrophysical Journal (Online)

Additional Journal Information:: Journal Name: The Astrophysical Journal (Online); Journal Volume: 838; Journal Issue: 1; Journal ID: ISSN 1538-4357

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; dark matter; galaxies: dwarf; galaxies: individual (Tucana III); galaxies: stellar content; Local Group; stars: abundances

Citation Formats


                    Simon, J. D., Li, T. S., Drlica-Wagner, A., Bechtol, K., Marshall, J. L., James, D. J., Wang, M. Y., Strigari, L., Balbinot, E., Kuehn, K., Walker, A. R., Abbott, T. M.  C., Allam, S., Annis, J., Benoit-Lévy, A., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., D’Andrea, C. B., Costa, L. N.  da, DePoy, D. L., Desai, S., Doel, P., Fernandez, E., Flaugher, B., Frieman, J., García-Bellido, J., Gaztanaga, E., Goldstein, D. A., Gruen, D., Gutierrez, G., Kuropatkin, N., Maia, M. A.  G., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Neilsen, E., Nord, B., Ogando, R., Plazas, A. A., Romer, A. K., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Sobreira, F., Suchyta, E., Swanson, M. E.  C., Tarle, G., Whiteway, L., and Yanny, B. Nearest neighbor: The low-mass Milky Way satellite Tucana III.  United States: N. p., 2017. 
Web.  doi:10.3847/1538-4357/aa5be7.

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                    Simon, J. D., Li, T. S., Drlica-Wagner, A., Bechtol, K., Marshall, J. L., James, D. J., Wang, M. Y., Strigari, L., Balbinot, E., Kuehn, K., Walker, A. R., Abbott, T. M.  C., Allam, S., Annis, J., Benoit-Lévy, A., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., D’Andrea, C. B., Costa, L. N.  da, DePoy, D. L., Desai, S., Doel, P., Fernandez, E., Flaugher, B., Frieman, J., García-Bellido, J., Gaztanaga, E., Goldstein, D. A., Gruen, D., Gutierrez, G., Kuropatkin, N., Maia, M. A.  G., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Neilsen, E., Nord, B., Ogando, R., Plazas, A. A., Romer, A. K., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Sobreira, F., Suchyta, E., Swanson, M. E.  C., Tarle, G., Whiteway, L., & Yanny, B. Nearest neighbor: The low-mass Milky Way satellite Tucana III.  United States.  https://doi.org/10.3847/1538-4357/aa5be7

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                    Simon, J. D., Li, T. S., Drlica-Wagner, A., Bechtol, K., Marshall, J. L., James, D. J., Wang, M. Y., Strigari, L., Balbinot, E., Kuehn, K., Walker, A. R., Abbott, T. M.  C., Allam, S., Annis, J., Benoit-Lévy, A., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Cunha, C. E., D’Andrea, C. B., Costa, L. N.  da, DePoy, D. L., Desai, S., Doel, P., Fernandez, E., Flaugher, B., Frieman, J., García-Bellido, J., Gaztanaga, E., Goldstein, D. A., Gruen, D., Gutierrez, G., Kuropatkin, N., Maia, M. A.  G., Martini, P., Menanteau, F., Miller, C. J., Miquel, R., Neilsen, E., Nord, B., Ogando, R., Plazas, A. A., Romer, A. K., Rykoff, E. S., Sanchez, E., Santiago, B., Scarpine, V., Schubnell, M., Sevilla-Noarbe, I., Smith, R. C., Sobreira, F., Suchyta, E., Swanson, M. E.  C., Tarle, G., Whiteway, L., and Yanny, B. Fri .  
"Nearest neighbor: The low-mass Milky Way satellite Tucana III".  United States.  https://doi.org/10.3847/1538-4357/aa5be7.  https://www.osti.gov/servlets/purl/1349626.

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@article{osti_1349626,

  title        = {Nearest neighbor: The low-mass Milky Way satellite Tucana III},

  author       = {Simon, J. D. and Li, T. S. and Drlica-Wagner, A. and Bechtol, K. and Marshall, J. L. and James, D. J. and Wang, M. Y. and Strigari, L. and Balbinot, E. and Kuehn, K. and Walker, A. R. and Abbott, T. M.  C. and Allam, S. and Annis, J. and Benoit-Lévy, A. and Brooks, D. and Buckley-Geer, E. and Burke, D. L. and Rosell, A. Carnero and Kind, M. Carrasco and Carretero, J. and Cunha, C. E. and D’Andrea, C. B. and Costa, L. N.  da and DePoy, D. L. and Desai, S. and Doel, P. and Fernandez, E. and Flaugher, B. and Frieman, J. and García-Bellido, J. and Gaztanaga, E. and Goldstein, D. A. and Gruen, D. and Gutierrez, G. and Kuropatkin, N. and Maia, M. A.  G. and Martini, P. and Menanteau, F. and Miller, C. J. and Miquel, R. and Neilsen, E. and Nord, B. and Ogando, R. and Plazas, A. A. and Romer, A. K. and Rykoff, E. S. and Sanchez, E. and Santiago, B. and Scarpine, V. and Schubnell, M. and Sevilla-Noarbe, I. and Smith, R. C. and Sobreira, F. and Suchyta, E. and Swanson, M. E.  C. and Tarle, G. and Whiteway, L. and Yanny, B.},

  abstractNote = {We present Magellan/IMACS spectroscopy of the recently discovered Milky Way satellite Tucana III (Tuc III). We identify 26 member stars in Tuc III from which we measure a mean radial velocity of v (hel) = -102.3 ± 0.4 (stat.) ± 2.0 (sys.) $\mathrm{km}\,{{\rm{s}}}^{-1}$, a velocity dispersion of ${0.1}_{-0.1}^{+0.7}$ $\mathrm{km}\,{{\rm{s}}}^{-1}$, and a mean metallicity of ${\rm{[Fe/H]}}=-{2.42}_{-0.08}^{+0.07}$. The upper limit on the velocity dispersion is σ < 1.5 $\mathrm{km}\,{{\rm{s}}}^{-1}$ at 95.5% confidence, and the corresponding upper limit on the mass within the half-light radius of Tuc III is 9.0 × 10(4) M (⊙). We cannot rule out mass-to-light ratios as large as 240 M (⊙)/L (⊙) for Tuc III, but much lower mass-to-light ratios that would leave the system baryon-dominated are also allowed. We measure an upper limit on the metallicity spread of the stars in Tuc III of 0.19 dex at 95.5% confidence. Tuc III has a smaller metallicity dispersion and likely a smaller velocity dispersion than any known dwarf galaxy, but a larger size and lower surface brightness than any known globular cluster. Its metallicity is also much lower than those of the clusters with similar luminosity. We therefore tentatively suggest that Tuc III is the tidally stripped remnant of a dark matter-dominated dwarf galaxy, but additional precise velocity and metallicity measurements will be necessary for a definitive classification. If Tuc III is indeed a dwarf galaxy, it is one of the closest external galaxies to the Sun. Because of its proximity, the most luminous stars in Tuc III are quite bright, including one star at V = 15.7 that is the brightest known member star of an ultra-faint satellite.},

  doi          = {10.3847/1538-4357/aa5be7},

  journal      = {The Astrophysical Journal (Online)},

  number       = 1,

  volume       = 838,

  place        = {United States},

  year         = {Fri Mar 17 00:00:00 EDT 2017},

  month        = {Fri Mar 17 00:00:00 EDT 2017}

}

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Title: Nearest neighbor: The low-mass Milky Way satellite Tucana III

Abstract

Citation Formats

Modeling the Structure and Dynamics of Dwarf Spheroidal Galaxies with Dark Matter and Tides journal, May 2008

A Hero’S dark Horse: Discovery of an Ultra-Faint Milky way Satellite in Pegasus journal, May 2015

The Most Dark‐Matter–dominated Galaxies: Predicted Gamma‐Ray Signals from the Faintest Milky Way Dwarfs journal, May 2008

SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI -LAT DATA journal, August 2015

Discovery of a Faint Outer halo Milky way star Cluster in the Southern sky journal, April 2015

Spectroscopic Confirmation of the Dwarf Galaxies Hydra ii and Pisces ii and the Globular Cluster Laevens 1 journal, August 2015

“Galaxy,” Defined journal, August 2012

A Spectroscopic Binary in the Hercules Dwarf Spheroidal Galaxy journal, December 2013

Accurate masses for dispersion-supported galaxies: Accurate masses for spheroidal galaxies journal, May 2010

corner.py: Scatterplot matrices in Python journal, June 2016

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data journal, November 2015

High-Resolution Spectroscopy of Extremely Metal-Poor Stars in the Least Evolved Galaxies: BoÖTes ii journal, January 2016

Heavy-Element Dispersion in the Metal-Poor Globular Cluster m92 journal, June 2011

Dark matter profiles and annihilation in dwarf spheroidal galaxies: prospectives for present and future γ-ray observatories - I. The classical dwarf spheroidal galaxies: γ-ray from dark matter annihilation in dSphs journal, November 2011

Eight new Milky way Companions Discovered in First-Year dark Energy Survey data journal, June 2015

A Magellanic origin of the DES dwarfs journal, June 2016

A Chemical Confirmation of the Faint BoÖTes ii Dwarf Spheroidal Galaxy journal, September 2014

The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies journal, November 2013

An Ultra-Faint Galaxy Candidate Discovered in Early data from the Magellanic Satellites Survey journal, November 2016

The Kinematics of the Ultra‐faint Milky Way Satellites: Solving the Missing Satellite Problem journal, November 2007

Dwarf Galaxy Annihilation and Decay Emission Profiles for dark Matter Experiments journal, March 2015

Identifying true satellites of the Magellanic Clouds journal, November 2016

IMACS: the wide-field imaging spectrograph on Magellan-Baade conference, June 2006

SAGITTARIUS II, DRACO II AND LAEVENS 3: THREE NEW MILKY WAY SATELLITES DISCOVERED IN THE PAN-STARRS 1 3 π SURVEY journal, October 2015

Horologium ii: a Second Ultra-Faint Milky way Satellite in the Horologium Constellation journal, July 2015

The near-infrared Ca ii triplet as a metallicity indicator – II. Extension to extremely metal-poor metallicity regimes★ journal, July 2013

Triangulum ii: Possibly a very Dense Ultra-Faint Dwarf Galaxy journal, November 2015

THE MILKY WAY'S CIRCULAR-VELOCITY CURVE BETWEEN 4 AND 14 kpc FROM APOGEE DATA journal, October 2012

Correcting Velocity Dispersions of Dwarf Spheroidal Galaxies for Binary Orbital Motion journal, September 2010

Hydra ii: a Faint and Compact Milky way Dwarf Galaxy Found in the Survey of the Magellanic Stellar History journal, April 2015

Study of the Sextans dwarf spheroidal galaxy from the DART Ca ii triplet survey★: The DART survey of the Sextans dSph journal, November 2010

The Abundances of Neutron-Capture Species in the very Metal-Poor Globular Cluster m15: a Uniform Analysis of red Giant Branch and red Horizontal Branch Stars journal, April 2011

The usage of Strömgren photometry in studies of local group dwarf spheroidal galaxies: Application to Draco: a new catalogue of Draco members and a study of the metallicity distribution function and radial gradients journal, October 2006

The Tidal Evolution of Local Group Dwarf Spheroidals journal, January 2008

Beasts of the Southern Wild: Discovery of nine Ultra Faint Satellites in the Vicinity of the Magellanic Clouds journal, May 2015

Deep wide-field imaging down to the oldest main sequence turn-offs in the Sculptor dwarf spheroidal galaxy journal, March 2011

Two Distinct Ancient Components in the Sculptor Dwarf Spheroidal Galaxy: First Results from the Dwarf Abundances and Radial Velocities Team journal, November 2004

A Comprehensive Maximum Likelihood Analysis of the Structural Properties of Faint Milky Way Satellites journal, September 2008

Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum ii journal, July 2015

The Structure of Cold Dark Matter Halos journal, May 1996

Willman 1—a Probable Dwarf Galaxy with an Irregular Kinematic Distribution journal, September 2011

Structure and Dynamics of the Globular Cluster Palomar 13 journal, December 2011

Cats and Dogs, Hair and a Hero: A Quintet of New Milky Way Companions journal, January 2007

Palomar 13: An Unusual Stellar System in the Galactic Halo journal, August 2002

Atmospheres, Chemical Compositions, and Evolutionary Histories of Very Metal-Poor Red Horizontal-Branch Stars in the Galactic Field and in NGC 7078 (M15) journal, June 2006

Exploring Halo Substructure with Giant Stars. X. Extended Dark Matter or Tidal Disruption?: The Case for the Leo I Dwarf Spheroidal Galaxy journal, July 2007

Eight Ultra-Faint Galaxy Candidates Discovered in year two of the dark Energy Survey journal, November 2015

The contribution of dissolving star clusters to the population of ultra faint objects in the outer halo of the Milky Way journal, December 2016

emcee : The MCMC Hammer journal, March 2013

Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies journal, February 2016

parsec : stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code journal, October 2012

Bounds on cross sections and lifetimes for dark matter annihilation and decay into charged leptons from gamma-ray observations of dwarf galaxies journal, July 2009

The Deep2 Galaxy Redshift Survey: Design, Observations, data Reduction, and Redshifts journal, August 2013

Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded‐Field Photometry and Cluster Fiducial Sequences in ugriz journal, December 2008

Internal Kinematics of the Fornax Dwarf Spheroidal Galaxy journal, April 2006

Revisiting the Influence of Unidentified Binaries on Velocity Dispersion Measurements in Ultra-Faint Stellar Systems journal, October 2010

Accurate Stellar Kinematics at Faint Magnitudes: Application to the BoÖTes i Dwarf Spheroidal Galaxy journal, July 2011

Segue 2: the Least Massive Galaxy journal, May 2013

IMACS: The Inamori-Magellan Areal Camera and Spectrograph on Magellan-Baade journal, March 2011

The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization era journal, November 2014

Planet–disc evolution and the formation of Kozai–Lidov planets journal, March 2016

Segue 1: an Unevolved Fossil Galaxy from the Early Universe journal, April 2014

The Observed Properties of Dwarf Galaxies in and Around the Local Group journal, June 2012

Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in year two of Dark Energy Survey with Fermi-LAT data journal, February 2016

A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries journal, August 2002

The feeble giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater journal, April 2016

A Catalog of Parameters for Globular Clusters in the Milky Way journal, October 1996

Kinematics and Chemistry of Recently Discovered Reticulum 2 and Horologium 1 Dwarf Galaxies journal, September 2015

Portrait of a dark Horse: a Photometric and Spectroscopic Study of the Ultra-Faint Milky way Satellite Pegasus iii journal, December 2016

At the survey limits: discovery of the Aquarius 2 dwarf galaxy in the VST ATLAS and the SDSS data journal, August 2016

A Complete Spectroscopic Survey of the Milky way Satellite Segue 1: the Darkest Galaxy journal, May 2011

Galactic Dynamics (Second Edition) book, December 2008

The feeble giant: Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater text, January 2016

Two major accretion epochs in M31 from two distinct populations of globular clusters. journalarticle, January 2019

Dark matter profiles and annihilation in dwarf spheroidal galaxies: prospectives for present and future γ-ray observatories – I. The classical dwarf spheroidal galaxies text, January 2011

A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries text, January 2002

The Tidal Evolution of Local Group Dwarf Spheroidals text, January 2007

Modeling the Structure and Dynamics of Dwarf Spheroidal Galaxies with Dark Matter and Tides
journal, May 2008

A Hero’S dark Horse: Discovery of an Ultra-Faint Milky way Satellite in Pegasus
journal, May 2015

The Most Dark‐Matter–dominated Galaxies: Predicted Gamma‐Ray Signals from the Faintest Milky Way Dwarfs
journal, May 2008

SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI -LAT DATA
journal, August 2015

Discovery of a Faint Outer halo Milky way star Cluster in the Southern sky
journal, April 2015

Spectroscopic Confirmation of the Dwarf Galaxies Hydra ii and Pisces ii and the Globular Cluster Laevens 1
journal, August 2015

“Galaxy,” Defined
journal, August 2012

A Spectroscopic Binary in the Hercules Dwarf Spheroidal Galaxy
journal, December 2013

Accurate masses for dispersion-supported galaxies: Accurate masses for spheroidal galaxies
journal, May 2010

corner.py: Scatterplot matrices in Python
journal, June 2016

Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data
journal, November 2015

High-Resolution Spectroscopy of Extremely Metal-Poor Stars in the Least Evolved Galaxies: BoÖTes ii
journal, January 2016

Heavy-Element Dispersion in the Metal-Poor Globular Cluster m92
journal, June 2011

Dark matter profiles and annihilation in dwarf spheroidal galaxies: prospectives for present and future γ-ray observatories - I. The classical dwarf spheroidal galaxies: γ-ray from dark matter annihilation in dSphs
journal, November 2011

Eight new Milky way Companions Discovered in First-Year dark Energy Survey data
journal, June 2015

A Magellanic origin of the DES dwarfs
journal, June 2016

A Chemical Confirmation of the Faint BoÖTes ii Dwarf Spheroidal Galaxy
journal, September 2014

The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
journal, November 2013

An Ultra-Faint Galaxy Candidate Discovered in Early data from the Magellanic Satellites Survey
journal, November 2016

The Kinematics of the Ultra‐faint Milky Way Satellites: Solving the Missing Satellite Problem
journal, November 2007

Dwarf Galaxy Annihilation and Decay Emission Profiles for dark Matter Experiments
journal, March 2015

Identifying true satellites of the Magellanic Clouds
journal, November 2016

IMACS: the wide-field imaging spectrograph on Magellan-Baade
conference, June 2006

SAGITTARIUS II, DRACO II AND LAEVENS 3: THREE NEW MILKY WAY SATELLITES DISCOVERED IN THE PAN-STARRS 1 3 π SURVEY
journal, October 2015

Horologium ii: a Second Ultra-Faint Milky way Satellite in the Horologium Constellation
journal, July 2015

The near-infrared Ca ii triplet as a metallicity indicator – II. Extension to extremely metal-poor metallicity regimes★
journal, July 2013

Triangulum ii: Possibly a very Dense Ultra-Faint Dwarf Galaxy
journal, November 2015

THE MILKY WAY'S CIRCULAR-VELOCITY CURVE BETWEEN 4 AND 14 kpc FROM APOGEE DATA
journal, October 2012

Correcting Velocity Dispersions of Dwarf Spheroidal Galaxies for Binary Orbital Motion
journal, September 2010

Hydra ii: a Faint and Compact Milky way Dwarf Galaxy Found in the Survey of the Magellanic Stellar History
journal, April 2015

Study of the Sextans dwarf spheroidal galaxy from the DART Ca ii triplet survey★: The DART survey of the Sextans dSph
journal, November 2010

The Abundances of Neutron-Capture Species in the very Metal-Poor Globular Cluster m15: a Uniform Analysis of red Giant Branch and red Horizontal Branch Stars
journal, April 2011

The usage of Strömgren photometry in studies of local group dwarf spheroidal galaxies: Application to Draco: a new catalogue of Draco members and a study of the metallicity distribution function and radial gradients
journal, October 2006

The Tidal Evolution of Local Group Dwarf Spheroidals
journal, January 2008

Beasts of the Southern Wild: Discovery of nine Ultra Faint Satellites in the Vicinity of the Magellanic Clouds
journal, May 2015

Deep wide-field imaging down to the oldest main sequence turn-offs in the Sculptor dwarf spheroidal galaxy
journal, March 2011

Two Distinct Ancient Components in the Sculptor Dwarf Spheroidal Galaxy: First Results from the Dwarf Abundances and Radial Velocities Team
journal, November 2004

A Comprehensive Maximum Likelihood Analysis of the Structural Properties of Faint Milky Way Satellites
journal, September 2008

Stellar Kinematics and Metallicities in the Ultra-Faint Dwarf Galaxy Reticulum ii
journal, July 2015

The Structure of Cold Dark Matter Halos
journal, May 1996

Willman 1—a Probable Dwarf Galaxy with an Irregular Kinematic Distribution
journal, September 2011

Structure and Dynamics of the Globular Cluster Palomar 13
journal, December 2011

Cats and Dogs, Hair and a Hero: A Quintet of New Milky Way Companions
journal, January 2007

Palomar 13: An Unusual Stellar System in the Galactic Halo
journal, August 2002

Atmospheres, Chemical Compositions, and Evolutionary Histories of Very Metal-Poor Red Horizontal-Branch Stars in the Galactic Field and in NGC 7078 (M15)
journal, June 2006

Exploring Halo Substructure with Giant Stars. X. Extended Dark Matter or Tidal Disruption?: The Case for the Leo I Dwarf Spheroidal Galaxy
journal, July 2007

Eight Ultra-Faint Galaxy Candidates Discovered in year two of the dark Energy Survey
journal, November 2015

The contribution of dissolving star clusters to the population of ultra faint objects in the outer halo of the Milky Way
journal, December 2016

`emcee` : The MCMC Hammer
journal, March 2013

Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
journal, February 2016

parsec : stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
journal, October 2012

Bounds on cross sections and lifetimes for dark matter annihilation and decay into charged leptons from gamma-ray observations of dwarf galaxies
journal, July 2009

The Deep2 Galaxy Redshift Survey: Design, Observations, data Reduction, and Redshifts
journal, August 2013

Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded‐Field Photometry and Cluster Fiducial Sequences in ugriz
journal, December 2008

Internal Kinematics of the Fornax Dwarf Spheroidal Galaxy
journal, April 2006

Revisiting the Influence of Unidentified Binaries on Velocity Dispersion Measurements in Ultra-Faint Stellar Systems
journal, October 2010

Accurate Stellar Kinematics at Faint Magnitudes: Application to the BoÖTes i Dwarf Spheroidal Galaxy
journal, July 2011

Segue 2: the Least Massive Galaxy
journal, May 2013

IMACS: The Inamori-Magellan Areal Camera and Spectrograph on Magellan-Baade
journal, March 2011

The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization era
journal, November 2014

Planet–disc evolution and the formation of Kozai–Lidov planets
journal, March 2016

Segue 1: an Unevolved Fossil Galaxy from the Early Universe
journal, April 2014

The Observed Properties of Dwarf Galaxies in and Around the Local Group
journal, June 2012

Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in year two of Dark Energy Survey with Fermi-LAT data
journal, February 2016

A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries
journal, August 2002

The feeble giant. Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater
journal, April 2016

A Catalog of Parameters for Globular Clusters in the Milky Way
journal, October 1996

Kinematics and Chemistry of Recently Discovered Reticulum 2 and Horologium 1 Dwarf Galaxies
journal, September 2015

Portrait of a dark Horse: a Photometric and Spectroscopic Study of the Ultra-Faint Milky way Satellite Pegasus iii
journal, December 2016

At the survey limits: discovery of the Aquarius 2 dwarf galaxy in the VST ATLAS and the SDSS data
journal, August 2016

A Complete Spectroscopic Survey of the Milky way Satellite Segue 1: the Darkest Galaxy
journal, May 2011

Galactic Dynamics (Second Edition)
book, December 2008

The feeble giant: Discovery of a large and diffuse Milky Way dwarf galaxy in the constellation of Crater
text, January 2016

Two major accretion epochs in M31 from two distinct populations of globular clusters.
journalarticle, January 2019

Dark matter profiles and annihilation in dwarf spheroidal galaxies: prospectives for present and future γ-ray observatories – I. The classical dwarf spheroidal galaxies
text, January 2011

A Survey of Proper-Motion Stars. XVI. Orbital Solutions for 171 Single-lined Spectroscopic Binaries
text, January 2002

The Tidal Evolution of Local Group Dwarf Spheroidals
text, January 2007

Modeling The Structure And Dynamics of Dwarf Spheroidal Galaxies with Dark Matter And Tides
text, January 2007

Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded Field Photometry and Cluster Fiducial Sequences in ugriz
text, January 2008

Correcting velocity dispersions of dwarf spheroidal galaxies for binary orbital motion
text, January 2010