skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Faint Halo Star Cluster Discovered in the Blanco Imaging of the Southern Sky Survey

Abstract

We present the discovery of a faint, resolved stellar system, BLISS J0321+0438 (BLISS 1), found in Dark Energy Camera data from the first observing run of the Blanco Imaging of the Southern Sky (BLISS) survey. BLISS J0321+0438 (BLISS 1) is located at $$({\alpha }_{2000},{\delta }_{2000})=(177\buildrel{\circ}\over{.} 511,-41\buildrel{\circ}\over{.} 772)$$ with a heliocentric distance of $${D}_{\odot }={23.7}_{-1.0}^{+1.9}\,\mathrm{kpc}$$. It is a faint, $${M}_{V}={0.0}_{-0.7}^{+1.7}\,\mathrm{mag}$$, and compact, $${r}_{h}={4.1}_{-1}^{+1}\,\mathrm{pc}$$, system consistent with previously discovered faint halo star clusters. Using data from the second data release of the Gaia satellite, we measure a proper motion of $$({\mu }_{\alpha }\cos \delta ,{\mu }_{\delta })=(-2.37\pm 0.06,0.16\pm 0.04)$$ mas yr –1. Here, combining the available positional and velocity information with simulations of the accreted satellite population of the Large Magellanic Cloud (LMC), we find that it is unlikely that BLISS J0321+0438 (BLISS 1) originated with the LMC.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [5]; ORCiD logo [6];  [5];  [5];  [5];  [7]; ORCiD logo [5];  [8]; ORCiD logo [5];  [9];  [10];  [11]
  1. Univ. of Chicago, Chicago, IL (United States)
  2. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Univ. of Wisconsin, Madison, WI (United States)
  4. Texas A & M Univ., College Station, TX (United States)
  5. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  6. Brandeis Univ., Waltham, MA (United States)
  7. Federal Univ. of Rio de Janeiro, Rio de Janeiro (Brazil); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  8. European Southern Observatory, Garching (Germany)
  9. National Optical Astronomy Observatory, La Serena (Chile)
  10. Ohio Univ., Athens, OH (United States)
  11. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
BLISS Collaboration
OSTI Identifier:
1495352
Report Number(s):
arXiv:1812.06318; FERMILAB-PUB-18-653-AE
Journal ID: ISSN 1538-4357; 1710331
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 875; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; galaxies: halos; galaxies: star clusters: general; globular clusters: general; Local Group

Citation Formats

Mau, Sidney, Drlica-Wagner, A., Bechtol, K., Pace, A. B., Li, T., Soares-Santos, M., Kuropatkin, N., Allam, S., Tucker, D., Santana-Silva, L., Yanny, B., Jethwa, P., Palmese, A., Vivas, K., Burgad, C., and Chen, H. -Y. A Faint Halo Star Cluster Discovered in the Blanco Imaging of the Southern Sky Survey. United States: N. p., 2019. Web. doi:10.3847/1538-4357/ab0bb8.
Mau, Sidney, Drlica-Wagner, A., Bechtol, K., Pace, A. B., Li, T., Soares-Santos, M., Kuropatkin, N., Allam, S., Tucker, D., Santana-Silva, L., Yanny, B., Jethwa, P., Palmese, A., Vivas, K., Burgad, C., & Chen, H. -Y. A Faint Halo Star Cluster Discovered in the Blanco Imaging of the Southern Sky Survey. United States. https://doi.org/10.3847/1538-4357/ab0bb8
Mau, Sidney, Drlica-Wagner, A., Bechtol, K., Pace, A. B., Li, T., Soares-Santos, M., Kuropatkin, N., Allam, S., Tucker, D., Santana-Silva, L., Yanny, B., Jethwa, P., Palmese, A., Vivas, K., Burgad, C., and Chen, H. -Y. Sat . "A Faint Halo Star Cluster Discovered in the Blanco Imaging of the Southern Sky Survey". United States. https://doi.org/10.3847/1538-4357/ab0bb8. https://www.osti.gov/servlets/purl/1495352.
@article{osti_1495352,
title = {A Faint Halo Star Cluster Discovered in the Blanco Imaging of the Southern Sky Survey},
author = {Mau, Sidney and Drlica-Wagner, A. and Bechtol, K. and Pace, A. B. and Li, T. and Soares-Santos, M. and Kuropatkin, N. and Allam, S. and Tucker, D. and Santana-Silva, L. and Yanny, B. and Jethwa, P. and Palmese, A. and Vivas, K. and Burgad, C. and Chen, H. -Y.},
abstractNote = {We present the discovery of a faint, resolved stellar system, BLISS J0321+0438 (BLISS 1), found in Dark Energy Camera data from the first observing run of the Blanco Imaging of the Southern Sky (BLISS) survey. BLISS J0321+0438 (BLISS 1) is located at $({\alpha }_{2000},{\delta }_{2000})=(177\buildrel{\circ}\over{.} 511,-41\buildrel{\circ}\over{.} 772)$ with a heliocentric distance of ${D}_{\odot }={23.7}_{-1.0}^{+1.9}\,\mathrm{kpc}$. It is a faint, ${M}_{V}={0.0}_{-0.7}^{+1.7}\,\mathrm{mag}$, and compact, ${r}_{h}={4.1}_{-1}^{+1}\,\mathrm{pc}$, system consistent with previously discovered faint halo star clusters. Using data from the second data release of the Gaia satellite, we measure a proper motion of $({\mu }_{\alpha }\cos \delta ,{\mu }_{\delta })=(-2.37\pm 0.06,0.16\pm 0.04)$ mas yr–1. Here, combining the available positional and velocity information with simulations of the accreted satellite population of the Large Magellanic Cloud (LMC), we find that it is unlikely that BLISS J0321+0438 (BLISS 1) originated with the LMC.},
doi = {10.3847/1538-4357/ab0bb8},
url = {https://www.osti.gov/biblio/1495352}, journal = {The Astrophysical Journal (Online)},
issn = {1538-4357},
number = 2,
volume = 875,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Astropy: A community Python package for astronomy
journal, September 2013


A new Milky way halo star Cluster in the Southern Galactic sky
journal, April 2013


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


ATLAS lifts the Cup: discovery of a new Milky Way satellite in Crater
journal, May 2014


SExtractor: Software for source extraction
journal, June 1996


Characterization of the velocity anisotropy of accreted globular clusters
journal, July 2017


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


Tracing Galaxy Formation with Stellar Halos. I. Methods
journal, December 2005


Abundances and Kinematics of the Globular Cluster Systems of the Galaxy and of the Sagittarius Dwarf
journal, June 1995


Satellites of LMC-mass dwarfs: close friendships ruined by Milky Way mass haloes
journal, September 2015


The Dark Energy Survey: Data Release 1
journal, November 2018


The acs Survey of Galactic Globular Clusters. ix. Horizontal Branch Morphology and the Second Parameter Phenomenon
journal, December 2009


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


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


Dark Energy Survey Year 1 Results: The Photometric Data Set for Cosmology
journal, April 2018


The Circular Velocity Curve of the Milky Way from 5 to 25 kpc
journal, January 2019


SEGUE 3: AN OLD, EXTREMELY LOW LUMINOSITY STAR CLUSTER IN THE MILKY WAY's HALO
journal, August 2011


The dark Energy Camera
journal, October 2015


Accreted versus in situ Milky Way globular clusters
journal, February 2010


emcee : The MCMC Hammer
journal, March 2013

  • Foreman-Mackey, Daniel; Hogg, David W.; Lang, Dustin
  • Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925
  • https://doi.org/10.1086/670067

Gaia Data Release 2 : Summary of the contents and survey properties
journal, August 2018


The Observed Properties of Dark Matter on Small Spatial Scales
journal, July 2007


Destruction of the Galactic Globular Cluster System
journal, January 1997


HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere
journal, April 2005


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


Matplotlib: A 2D Graphics Environment
journal, January 2007


A Magellanic origin of the DES dwarfs
journal, June 2016


The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-faint Galaxies
journal, October 2018


Global survey of star clusters in the Milky Way: II. The catalogue of basic parameters ⋆
journal, October 2013


Kim 3: an Ultra-Faint star Cluster in the Constellation of Centaurus
journal, March 2016


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


The Discovery of Two Extremely Low Luminosity Milky Way Globular Clusters
journal, November 2007


Gaia 1 and 2. A pair of new Galactic star clusters
journal, May 2017


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


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


A new Distant Milky way Globular Cluster in the Pan-Starrs1 3π Survey
journal, April 2014


The bifurcated age–metallicity relation of Milky Way globular clusters and its implications for the accretion history of the galaxy
journal, September 2013


Gaia Data Release 2 : The astrometric solution
journal, August 2018


The Dark Energy Survey view of the Sagittarius stream: discovery of two faint stellar system candidates
journal, February 2017


Digging deeper into the Southern skies: a compact Milky Way companion discovered in first-year Dark Energy Survey data
journal, February 2016


Deep SOAR follow-up photometry of two Milky Way outer-halo companions discovered with Dark Energy Survey
journal, April 2018


Evidence for an Accretion Origin for the Outer halo Globular Cluster System of m31
journal, June 2010


The acs Survey of Galactic Globular Clusters. vii. Relative ages
journal, March 2009


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


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


The Dark Energy Survey Image Processing Pipeline
journal, May 2018


The Discovery of an Ultra-Faint star Cluster in the Constellation of ursa Minor
journal, June 2012


The Origin of the Magellanic Stream and Its Leading Arm
journal, May 2008


A timing constraint on the (total) mass of the Large Magellanic Cloud
journal, November 2015


Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
journal, June 1998


Compositions of halo clusters and the formation of the galactic halo
journal, October 1978


The Two Micron All Sky Survey (2MASS)
journal, February 2006


Nine tiny star clusters in Gaia DR1, PS1, and DES
journal, January 2019


The NumPy Array: A Structure for Efficient Numerical Computation
journal, March 2011


Evidence for an Intermediate-mass Milky Way from Gaia DR2 Halo Globular Cluster Motions
journal, March 2019


Satellite Dwarf Galaxies in a Hierarchical Universe: Infall Histories, Group Preprocessing, and Reionization
journal, June 2015


Local ultra faint dwarves as a product of Galactic processing during a Magellanic group infall
journal, August 2015