Butterfly in a Cocoon, Understanding the Origin and Morphology of Globular Cluster Streams: The Case of GD-1
Abstract
Tidally disrupted globular cluster (GC) streams are usually observed, and therefore perceived, as narrow, linear, and one-dimensional structures in the 6D phase space. In this paper, we show that the GD-1 stellar stream, which is the tidal debris of a disrupted GC, possesses a secondary diffuse and extended stellar component (~100 pc wide) around it, detected at the >5σ confidence level. Similar morphological properties are seen in synthetic streams that are produced from star clusters that are formed within dark matter sub-halos and then accrete onto a massive host galaxy. This lends credence to the idea that the progenitor of the highly retrograde GD-1 stream was originally formed outside of the Milky Way in a now defunct dark satellite galaxy. We deem that in future studies, this newly found cocoon component may serve as a structural hallmark to distinguish between the in situ and ex situ (accreted) formed GC streams.
- Authors:
-
[1];
[2];
[3];
[4];
- Stockholm Univ. (Sweden)
- Univ. de Strasbourg (France)
- Univ. of Toronto, ON (Canada)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Stockholm Univ. (Sweden); The Nordic Inst. for Theoretical Physics (NORDITA), Stockholm (Sweden); Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Swedish Research Council (VR); Oskar Klein Centre for Cosmoparticle Physics; Leinweber Center for Theoretical Physics; National Aeronautics and Space Administration (NASA); National Development and Reform Commission; Alfred P. Sloan Foundation; National Science Foundation (NSF)
- OSTI Identifier:
- 1610970
- Grant/Contract Number:
- SC0007859; 638-2013-8993; NNX15AK79G
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 881; 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; Astronomy & Astrophysics; Galaxy: formation; Galaxy: halo; Galaxy: structure; globular clusters: general; stars: kinematics and dynamics
Citation Formats
Malhan, Khyati, Ibata, Rodrigo A., Carlberg, Raymond G., Valluri, Monica, and Freese, Katherine. Butterfly in a Cocoon, Understanding the Origin and Morphology of Globular Cluster Streams: The Case of GD-1. United States: N. p., 2019.
Web. doi:10.3847/1538-4357/ab2e07.
Malhan, Khyati, Ibata, Rodrigo A., Carlberg, Raymond G., Valluri, Monica, & Freese, Katherine. Butterfly in a Cocoon, Understanding the Origin and Morphology of Globular Cluster Streams: The Case of GD-1. United States. https://doi.org/10.3847/1538-4357/ab2e07
Malhan, Khyati, Ibata, Rodrigo A., Carlberg, Raymond G., Valluri, Monica, and Freese, Katherine. Tue .
"Butterfly in a Cocoon, Understanding the Origin and Morphology of Globular Cluster Streams: The Case of GD-1". United States. https://doi.org/10.3847/1538-4357/ab2e07. https://www.osti.gov/servlets/purl/1610970.
@article{osti_1610970,
title = {Butterfly in a Cocoon, Understanding the Origin and Morphology of Globular Cluster Streams: The Case of GD-1},
author = {Malhan, Khyati and Ibata, Rodrigo A. and Carlberg, Raymond G. and Valluri, Monica and Freese, Katherine},
abstractNote = {Tidally disrupted globular cluster (GC) streams are usually observed, and therefore perceived, as narrow, linear, and one-dimensional structures in the 6D phase space. In this paper, we show that the GD-1 stellar stream, which is the tidal debris of a disrupted GC, possesses a secondary diffuse and extended stellar component (~100 pc wide) around it, detected at the >5σ confidence level. Similar morphological properties are seen in synthetic streams that are produced from star clusters that are formed within dark matter sub-halos and then accrete onto a massive host galaxy. This lends credence to the idea that the progenitor of the highly retrograde GD-1 stream was originally formed outside of the Milky Way in a now defunct dark satellite galaxy. We deem that in future studies, this newly found cocoon component may serve as a structural hallmark to distinguish between the in situ and ex situ (accreted) formed GC streams.},
doi = {10.3847/1538-4357/ab2e07},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 881,
place = {United States},
year = {Tue Aug 20 00:00:00 EDT 2019},
month = {Tue Aug 20 00:00:00 EDT 2019}
}
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Works referenced in this record:
The stellar halo of the Galaxy
journal, April 2008
- Helmi, Amina
- The Astronomy and Astrophysics Review, Vol. 15, Issue 3
Detection of a 63° Cold Stellar Stream in the Sloan Digital Sky Survey
journal, May 2006
- Grillmair, C. J.; Dionatos, O.
- The Astrophysical Journal, Vol. 643, Issue 1
How Lumpy Is the Milky Way’s Dark Matter Halo?
journal, May 2002
- Johnston, Kathryn V.; Spergel, David N.; Haydn, Christian
- The Astrophysical Journal, Vol. 570, Issue 2
Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds
journal, June 1998
- Schlegel, David J.; Finkbeiner, Douglas P.; Davis, Marc
- The Astrophysical Journal, Vol. 500, Issue 2
Trigonometric Parallaxes of high mass star Forming Regions: the Structure and Kinematics of the Milky way
journal, February 2014
- Reid, M. J.; Menten, K. M.; Brunthaler, A.
- The Astrophysical Journal, Vol. 783, Issue 2
Gaia Data Release 2 : The astrometric solution
journal, August 2018
- Lindegren, L.; Hernández, J.; Bombrun, A.
- Astronomy & Astrophysics, Vol. 616
The New Galaxy: Signatures of Its Formation
journal, September 2002
- Freeman, Ken; Bland-Hawthorn, Joss
- Annual Review of Astronomy and Astrophysics, Vol. 40, Issue 1
The number and size of subhalo-induced gaps in stellar streams
text, January 2016
- Erkal, Denis; Belokurov, Vasily; Bovy, Jo
- Apollo - University of Cambridge Repository
Constraining the Milky way Potential with a Six-Dimensional Phase-Space map of the gd-1 Stellar Stream
journal, February 2010
- Koposov, Sergey E.; Rix, Hans-Walter; Hogg, David W.
- The Astrophysical Journal, Vol. 712, Issue 1
The mass distribution of the Fornax dSph: constraints from its globular cluster distribution: The mass distribution of the Fornax dSph
journal, September 2012
- Cole, David R.; Dehnen, Walter; Read, Justin I.
- Monthly Notices of the Royal Astronomical Society, Vol. 426, Issue 1
SEGUE: A SPECTROSCOPIC SURVEY OF 240,000 STARS WITH g = 14-20
journal, April 2009
- Yanny, Brian; Rockosi, Constance; Newberg, Heidi Jo
- The Astronomical Journal, Vol. 137, Issue 5
The cosmological simulation code gadget-2
journal, December 2005
- Springel, Volker
- Monthly Notices of the Royal Astronomical Society, Vol. 364, Issue 4
Searching for the GD-1 stream progenitor in Gaia DR2 with direct N -body simulations
journal, March 2019
- Webb, Jeremy J.; Bovy, Jo
- Monthly Notices of the Royal Astronomical Society, Vol. 485, Issue 4
parsec : stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
journal, October 2012
- Bressan, Alessandro; Marigo, Paola; Girardi, Léo
- Monthly Notices of the Royal Astronomical Society, Vol. 427, Issue 1
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud – II. Relative ages and distances for six ancient globular clusters
journal, July 2017
- Wagner-Kaiser, R.; Mackey, Dougal; Sarajedini, Ata
- Monthly Notices of the Royal Astronomical Society, Vol. 471, Issue 3
The pal 5 star Stream gaps
journal, November 2012
- Carlberg, R. G.; Grillmair, C. J.; Hetherington, Nathan
- The Astrophysical Journal, Vol. 760, Issue 1
Globular cluster formation and evolution in the context of cosmological galaxy assembly: open questions
journal, February 2018
- Forbes, Duncan A.; Bastian, Nate; Gieles, Mark
- Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 474, Issue 2210
Local kinematics and the local standard of rest
journal, April 2010
- Schönrich, Ralph; Binney, James; Dehnen, Walter
- Monthly Notices of the Royal Astronomical Society, Vol. 403, Issue 4
The dynamical evolution of accreted star clusters in the Milky Way
journal, December 2015
- Miholics, Meghan; Webb, Jeremy J.; Sills, Alison
- Monthly Notices of the Royal Astronomical Society, Vol. 456, Issue 1
Gaia Data Release 2 : The celestial reference frame (
journal, August 2018
- Mignard, F.; Klioner, S. A.; Lindegren, L.
- Astronomy & Astrophysics, Vol. 616
STREAMFINDER II: A possible fanning structure parallel to the GD-1 stream in Pan-STARRS1
journal, May 2018
- Malhan, Khyati; Ibata, Rodrigo A.; Goldman, Bertrand
- Monthly Notices of the Royal Astronomical Society, Vol. 478, Issue 3
Building Up the Globular Cluster System of the Milky Way: The Contribution of the Sagittarius Galaxy
journal, January 2003
- Bellazzini, Michele; Ferraro, Francesco R.; Ibata, Rodrigo
- The Astronomical Journal, Vol. 125, Issue 1
Gaia Data Release 2: Processing of the photometric data
journal, August 2018
- Riello, M.; De Angeli, F.; Evans, D. W.
- Astronomy & Astrophysics, Vol. 616
Probing dark matter with star clusters: a dark matter core in the ultra-faint dwarf Eridanus II
journal, February 2018
- Contenta, Filippo; Balbinot, Eduardo; Petts, James A.
- Monthly Notices of the Royal Astronomical Society, Vol. 476, Issue 3
Uncovering cold dark matter halo substructure with tidal streams
journal, June 2002
- Ibata, R. A.; Lewis, G. F.; Irwin, M. J.
- Monthly Notices of the Royal Astronomical Society, Vol. 332, Issue 4
Compositions of halo clusters and the formation of the galactic halo
journal, October 1978
- Searle, L.; Zinn, R.
- The Astrophysical Journal, Vol. 225
Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
journal, July 2018
- Abuter, R.; Amorim, A.; Anugu, N.
- Astronomy & Astrophysics, Vol. 615
Ghostly tributaries to the Milky Way: charting the halo’s stellar streams with the Gaia DR2 catalogue
journal, September 2018
- Malhan, Khyati; Ibata, Rodrigo A.; Martin, Nicolas F.
- Monthly Notices of the Royal Astronomical Society, Vol. 481, Issue 3
Tracing Galaxy Formation with Stellar Halos. I. Methods
journal, December 2005
- Bullock, James S.; Johnston, Kathryn V.
- The Astrophysical Journal, Vol. 635, Issue 2
Two stellar components in the halo of the Milky Way
journal, December 2007
- Carollo, Daniela; Beers, Timothy C.; Lee, Young Sun
- Nature, Vol. 450, Issue 7172
An analytical model for spherical galaxies and bulges
journal, June 1990
- Hernquist, Lars
- The Astrophysical Journal, Vol. 356
The Streams of the Gaping Abyss: A Population of Entangled Stellar Streams Surrounding the Inner Galaxy
journal, February 2019
- Ibata, Rodrigo A.; Malhan, Khyati; Martin, Nicolas F.
- The Astrophysical Journal, Vol. 872, Issue 2
Gaia Data Release 2 : Mapping the Milky Way disc kinematics
journal, August 2018
- Katz, D.; Antoja, T.; Romero-Gómez, M.
- Astronomy & Astrophysics, Vol. 616
Phlegethon, a Nearby 75°-long Retrograde Stellar Stream
journal, September 2018
- Ibata, Rodrigo A.; Malhan, Khyati; Martin, Nicolas F.
- The Astrophysical Journal, Vol. 865, Issue 2
A deeper look at the GD1 stream: density variations and wiggles
journal, March 2018
- de Boer, T. J. L.; Belokurov, V.; Koposov, S. E.
- Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 2
The structure of star clusters. III. Some simple dvriamical models
journal, February 1966
- King, Ivan R.
- The Astronomical Journal, Vol. 71
Signatures of ΛCDM Substructure in Tidal Debris
journal, July 2008
- Siegal‐Gaskins, Jennifer M.; Valluri, Monica
- The Astrophysical Journal, Vol. 681, Issue 1
The number and size of subhalo-induced gaps in stellar streams
journal, August 2016
- Erkal, Denis; Belokurov, Vasily; Bovy, Jo
- Monthly Notices of the Royal Astronomical Society, Vol. 463, Issue 1
STREAMFINDER – I. A new algorithm for detecting stellar streams
journal, April 2018
- Malhan, Khyati; Ibata, Rodrigo A.
- Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 3
Characterization of the velocity anisotropy of accreted globular clusters
journal, July 2017
- Bianchini, P.; Sills, A.; Miholics, M.
- Monthly Notices of the Royal Astronomical Society, Vol. 471, Issue 1
The Spur and the Gap in GD-1: Dynamical Evidence for a Dark Substructure in the Milky Way Halo
journal, July 2019
- Bonaca, Ana; Hogg, David W.; Price-Whelan, Adrian M.
- The Astrophysical Journal, Vol. 880, Issue 1
Globular Clusters in a Cosmological N -body Simulation
journal, July 2018
- Carlberg, Raymond G.
- The Astrophysical Journal, Vol. 861, Issue 1
Constraining the Milky Way halo potential with the GD-1 stellar stream
journal, April 2019
- Malhan, Khyati; Ibata, Rodrigo A.
- Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 3
Off the Beaten Path: Gaia Reveals GD-1 Stars outside of the Main Stream
journal, August 2018
- Price-Whelan, Adrian M.; Bonaca, Ana
- The Astrophysical Journal, Vol. 863, Issue 2
Gaia Data Release 2 : Kinematics of globular clusters and dwarf galaxies around the Milky Way★
journal, August 2018
- Helmi, A.; van Leeuwen, F.; McMillan, P. J.
- Astronomy & Astrophysics, Vol. 616
A synoptic map of halo substructures from the Pan-STARRS1 3π survey
journal, August 2016
- Bernard, Edouard J.; Ferguson, Annette M. N.; Schlafly, Edward F.
- Monthly Notices of the Royal Astronomical Society, Vol. 463, Issue 2
A semi-analytic dynamical friction model for cored galaxies
journal, August 2016
- Petts, J. A.; Read, J. I.; Gualandris, A.
- Monthly Notices of the Royal Astronomical Society, Vol. 463, Issue 1
Gaia Data Release 2. Kinematics of globular clusters and dwarf galaxies around the Milky Way
text, January 2018
- Helmi, A.; van Leeuwen, F.; McMillan, P. J.
- EDP Sciences
Two Stellar Components in the Halo of the Milky Way
text, January 2007
- Carollo, D.; Beers, T. C.; Lee, Y. S.
- arXiv
SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
text, January 2009
- Collaboration, Ii Segue; Yanny, Brian; Rockosi, Constance
- arXiv
Local Kinematics and the Local Standard of Rest
text, January 2009
- Schoenrich, R.; Binney, J.; Dehnen, W.
- arXiv
Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
text, January 2014
- Reid, M. J.; Menten, K. M.; Brunthaler, A.
- arXiv
The Dynamical Evolution of Accreted Star Clusters in the Milky Way
text, January 2015
- Miholics, Meghan; Webb, Jeremy J.; Sills, Alison
- arXiv
The number and size of subhalo-induced gaps in stellar streams
text, January 2016
- Erkal, Denis; Belokurov, Vasily; Bovy, Jo
- arXiv
A semi-analytic dynamical friction model for cored galaxies
text, January 2016
- Petts, James A.; Read, Justin I.; Gualandris, Alessia
- arXiv
Probing dark matter with star clusters: a dark matter core in the ultra-faint dwarf Eridanus II
text, January 2017
- Contenta, Filippo; Balbinot, Eduardo; Petts, James A.
- arXiv
Characterization of the velocity anisotropy of accreted globular clusters
text, January 2017
- Bianchini, Paolo; Sills, Alison; Miholics, Meghan
- arXiv
Exploring the nature and synchronicity of early cluster formation in the Large Magellanic Cloud: II. Relative ages and distances for six ancient globular clusters
text, January 2017
- Wagner-Kaiser, R.; Mackey, Dougal; Sarajedini, Ata
- arXiv
Globular Cluster Formation and Evolution in the Context of Cosmological Galaxy Assembly: Open Questions
text, January 2018
- Forbes, Duncan A.; Bastian, Nate; Gieles, Mark
- arXiv
Ghostly Tributaries to the Milky Way: Charting the Halo's Stellar Streams with the Gaia DR2 catalogue
text, January 2018
- Malhan, Khyati; Ibata, Rodrigo A.; Martin, Nicolas F.
- arXiv
Constraining the Milky Way Halo Potential with the GD-1 stellar stream
text, January 2018
- Malhan, Khyati; Ibata, Rodrigo A.
- arXiv
The Streams of the Gaping Abyss: A population of entangled stellar streams surrounding the Inner Galaxy
text, January 2019
- Ibata, Rodrigo; Malhan, Khyati; Martin, Nicolas
- arXiv
How Lumpy is the Milky Way's Dark Matter Halo?
text, January 2001
- Johnston, Kathryn V.; Spergel, David N.; Haydn, Christian
- arXiv
The New Galaxy: Signatures of its Formation
text, January 2002
- Freeman, Ken; Bland-Hawthorn, Joss
- arXiv
Building up the globular cluster system of the Milky Way. The contribution of the Sagittarius galaxy
text, January 2002
- Bellazzini, Michele; Ferraro, Francesco R.; Ibata, Rodrigo
- arXiv
Works referencing / citing this record:
Uncovering a 260 pc wide, 35-Myr-old filamentary relic of star formation
journal, November 2019
- Beccari, Giacomo; Boffin, Henri M. J.; Jerabkova, Tereza
- Monthly Notices of the Royal Astronomical Society, Vol. 491, Issue 2
Exploring the Outskirts of Globular Clusters: The Peculiar Kinematics of NGC 3201
journal, December 2019
- Bianchini, P.; Ibata, R.; Famaey, B.
- The Astrophysical Journal, Vol. 887, Issue 1
The Density Structure of Simulated Stellar Streams
journal, January 2020
- Carlberg, Raymond G.
- The Astrophysical Journal, Vol. 889, Issue 2
Phase-space Correlation in Stellar Streams of the Milky Way Halo: The Clash of Kshir and GD-1
journal, November 2019
- Malhan, Khyati; Ibata, Rodrigo A.; Carlberg, Raymond G.
- The Astrophysical Journal, Vol. 886, Issue 1
Exploring the outskirts of globular clusters: the peculiar kinematics of NGC 3201
text, January 2019
- Bianchini, P.; Ibata, R.; Famaey, B.
- arXiv