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Results 1 - 41 of 41

Satellite group infall into the Milky Way: exploring the Crater-Leo case with new HST proper motions
- Volume 19, Issue 17 - article #6
- Mariana P. J'ulio, Marcel S. Pawlowski, Sangmo Tony Sohn, Salvatore Taibi, Roeland P. van der Marel, Stacy S. McGaugh
- https://arxiv.org/abs/2404.16110
Proper Motions and Orbits of Distant Local Group Dwarf Galaxies from a combination of Gaia and Hubble Data. (arXiv:2312.09276v1 [astro-ph.GA])
- Volume 18, Issue 49 - article #5
- Paul Bennet, Ekta Patel, Sangmo Tony Sohn, Andres del Pino, Roeland P. van der Marel, Mattia Libralato, Laura L. Watkins, Antonio Aparicio, Gurtina Besla, Carme Gallart, Mark A. Fardal, Matteo Monelli, Elena Sacchi, Erik Tollerud, Daniel R. Weisz
- http://arxiv.org/abs/2312.09276
Mapping Gaia Parallax Systematic Errors over the Sky with Faint Milky Way Stars
- Volume 16, Issue 3 - article #10
- Mark A. Fardal, Roeland van der Marel, AndrÃ©s del Pino,, Sangmo Tony Sohn
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/161/2/58
Revealing the structure and internal rotation of the Sagittarius dwarf spheroidal galaxy with $Gaia$ and machine learning. (arXiv:2011.02627v1 [astro-ph.GA])
- Volume 15, Issue 45 - article #6
- Andrés del Pino, Mark A. Fardal, Roeland P. van der Marel, Ewa L. Łokas, Cecilia Mateu, Sangmo Tony Sohn
- http://arxiv.org/abs/2011.02627
HALO7D II: The Halo Velocity Ellipsoid and Velocity Anisotropy with Distant Main-sequence Stars
- Volume 14, Issue 29 - article #22
- Emily C. Cunningham, Alis J. Deason, Robyn E. Sanderson, Sangmo Tony Sohn, Jay Anderson, Puragra Guhathakurta, Constance M. Rockosi, Roeland P. van der Marel, Sarah R. Loebman,, Andrew Wetzel
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/879/2/120
First Gaia Dynamics of the Andromeda System: DR2 Proper Motions, Orbits, and Rotation of M31 and M33
- Volume 14, Issue 6 - article #16
- Roeland P. van der Marel, Mark A. Fardal, Sangmo Tony Sohn, Ekta Patel, Gurtina Besla, AndrÃ©s del Pino, Johannes Sahlmann,, Laura L. Watkins
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/872/1/24
The course of the Orphan Stream in the Northern Galactic Hemisphere traced with Gaia DR2. (arXiv:1812.06066v1 [astro-ph.GA])
- Volume 13, Issue 51 - article #4
- Mark A. Fardal, Roeland P. van der Marel, Sangmo Tony Sohn, Andres del Pino Molina
- http://arxiv.org/abs/1812.06066
The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-faint Galaxies
- Volume 13, Issue 43 - article #18
- Nitya Kallivayalil, Laura V. Sales, Paul Zivick, Tobias K. Fritz, AndrÃ©s Del Pino, Sangmo Tony Sohn, Gurtina Besla, Roeland P. van der Marel, Julio F. Navarro,, Elena Sacchi
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/867/1/19
The Proper Motion Field of the Small Magellanic Cloud: Kinematic Evidence for Its Tidal Disruption
- Volume 13, Issue 35 - article #14
- Paul Zivick, Nitya Kallivayalil, Roeland P. van der Marel, Gurtina Besla, Sean T. Linden, Szymon KozÅowski, Tobias K. Fritz, C. S. Kochanek, J. Anderson, Sangmo Tony Sohn, Marla C. Geha,, Charles R. Alcock
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/864/1/55
Absolute Hubble Space Telescope Proper Motion (HSTPROMO) of Distant Milky Way Globular Clusters: Galactocentric Space Velocities and the Milky Way Mass
- Volume 13, Issue 30 - article #14
- Sangmo Tony Sohn, Laura L. Watkins, Mark A. Fardal, Roeland P. van der Marel, Alis J. Deason, Gurtina Besla,, Andrea Bellini
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/862/1/52
First Gaia Dynamics of the Andromeda System: DR2 Proper Motions, Orbits, and Rotation of M31 and M33. (arXiv:1805.04079v1 [astro-ph.GA])
- Volume 13, Issue 19 - article #3
- Roeland P. van der Marel, Mark A. Fardal, Sangmo Tony Sohn, Ekta Patel, Gurtina Besla, Andrés del Pino-Molina, Johannes Sahlmann, Laura L. Watkins
- http://arxiv.org/abs/1805.04079
Evidence for an Intermediate-Mass Milky Way from Gaia DR2 Halo Globular Cluster Motions. (arXiv:1804.11348v1 [astro-ph.GA])
- Volume 13, Issue 18 - article #2
- Laura L. Watkins (1), Roeland P. van der Marel (1,2), Sangmo Tony Sohn (1), N. Wyn Evans (3) ((1) STScI, (2) JHU, (3) Cambridge)
- http://arxiv.org/abs/1804.11348
The Missing Satellites of the Magellanic Clouds? Gaia Proper Motions of the Recently Discovered Ultra-Faint Galaxies. (arXiv:1805.01448v1 [astro-ph.GA])
- Volume 13, Issue 18 - article #20
- Nitya Kallivayalil, Laura Sales, Paul Zivick, Tobias K. Fritz, Andrés Del Pino, Sangmo Tony Sohn, Gurtina Besla, Roeland P. van der Marel, Julio F. Navarro, Elena Sacchi
- http://arxiv.org/abs/1805.01448
Connecting the Milky Way potential profile to the orbital timescales and spatial structure of the Sagittarius Stream. (arXiv:1804.04995v1 [astro-ph.GA])
- Volume 13, Issue 16 - article #3
- Mark A. Fardal, Roeland P. van der Marel, David R. Law, Sangmo Tony Sohn, Branimir Sesar, Nina Hernitschek, Hans-Walter Rix
- http://arxiv.org/abs/1804.04995
Estimating the Mass of the Milky Way Using the Ensemble of Classical Satellite Galaxies
- Volume 13, Issue 16 - article #21
- Ekta Patel, Gurtina Besla, Kaisey Mandel,, Sangmo Tony Sohn
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/857/2/78
Absolute HST Proper Motion (HSTPROMO) Catalog of Distant Milky Way Globular Clusters: Three-dimensional Systemic Velocities and the Milky Way Mass. (arXiv:1804.01994v1 [astro-ph.GA])
- Volume 13, Issue 15 - article #1
- Sangmo Tony Sohn, Laura L. Watkins, Mark A. Fardal, Roeland P. van der Marel, Alis J. Deason, Gurtina Besla, Andrea Bellini
- http://arxiv.org/abs/1804.01994
The Metal-poor non-Sagittarius (?) Globular Cluster NGC 5053: Orbit and Mg, Al, and Si Abundances
- Volume 13, Issue 10 - article #15
- Baitian Tang, J. G. FernÃ¡ndez-Trincado, Doug Geisler, Olga Zamora, Szabolcs MÃ©szÃ¡ros, Thomas Masseron, Roger E. Cohen, D. A. GarcÃa-HernÃ¡ndez, Flavia DellâAgli, Timothy C. Beers, Ricardo P. Schiavon, Sangmo Tony Sohn, Sten Hasselquist, Annie C. Robin, Matthew Shetrone, Steven R. Majewski, Sandro Villanova, Jose Schiappacasse Ulloa, Richard R. Lane, Dante Minnti, Alexandre Roman-Lopes, Andres Almeida,, E. Moreno
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/855/1/38
The Metal-poor non-Sagittarius (?) Globular Cluster NGC 5053: Orbit and Mg, Al and Si Abundances. (arXiv:1801.08265v1 [astro-ph.SR])
- Volume 13, Issue 4 - article #14
- Baitian Tang, J. G. Fernandez-Trincado, Doug Geisler, Olga Zamora, Szabolcs Meszaros, Thomas Masseron, Roger E. Cohen, D. A. Garcia-Hernandez, Flavia Dell'Agli, Timothy C. Beers, Ricardo P. Schiavon, Sangmo Tony Sohn, Sten Hasselquist, Annie C. Robin, Matthew Shetrone, Steven R. Majewski, Sandro Villanova, Jose Schiappacasse Ulloa, Richard R. Lane, Dante Minnti, Alexandre Roman-Lopes, Andres Almeida, E. Moreno
- http://arxiv.org/abs/1801.08265
SMHASH: Anatomy of the Orphan Stream using RR Lyrae stars. (arXiv:1711.04663v1 [astro-ph.GA])
- Volume 12, Issue 46 - article #6
- David Hendel, Victoria Scowcroft, Kathryn V. Johnston, Mark A. Fardal, Roeland P. van der Marel, Sangmo Tony Sohn, Adrian M. Price-Whelan, Rachael L. Beaton, Gurtina Besla, Giuseppe Bono, Maria-Rosa L. Cioni, Gisella Clementini, Judith G. Cohen, Michele Fabrizio, Wendy L. Freedman, Alessia Garofalo, Carl J. Grillmair, Nitya Kallivayalil, Juna A. Kollmeier, David R. Law, Barry F. Madore, Steven R. Majewski, Massimo Marengo, Andrew J. Monson, Jillian R. Neeley, David L. Nidever, Grzegorz Pietrzyński, Mark Seibert, Branimir Sesar, Horace A. Smith, Igor Soszyński, Ian B. Thompson, Andrezej Udalski
- http://arxiv.org/abs/1711.04663
Space Motions of the Dwarf Spheroidal Galaxies Draco and Sculptor Based on HST Proper Motions with a ∼10 yr Time Baseline
- Volume 12, Issue 45 - article #12
- Sangmo Tony Sohn, Ekta Patel, Gurtina Besla, Roeland P. van der Marel, James S. Bullock, Louis E. Strigari, Glenn van de Ven, Matt G. Walker,, Andrea Bellini
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/849/2/93
The Proper Motion of Pyxis: the first use of Adaptive Optics in tandem with HST on a faint halo object. (arXiv:1611.08598v1 [astro-ph.GA])
- Volume 11, Issue 49 - article #13
- Tobias K. Fritz, Sean Linden, Paul Zivick, Nitya Kallivayalil, Rachael Beaton, Jo Bovy, Laura V. Sales, Tony Sohn, Dylan Angell, Michael Boylan-Kolchin, Eleazar R. Carrasco, Gulliermo Damke, Richard Davies, Steve Majewski, Benoit Neichel, Roeland van der Marel
- http://arxiv.org/abs/1611.08598
Hubble Space Telescope Proper Motions of Individual Stars in Stellar Streams: Orphan, Sagittarius, Lethe, and the New "Parallel" Stream. (arXiv:1611.02282v1 [astro-ph.GA])
- Volume 11, Issue 46 - article #8
- Sangmo Tony Sohn, Roeland P. van der Marel, Nitya Kallivayalil, Steven R. Majewski, Gurtina Besla, Jeffrey L. Carlin, David R. Law, Michael H. Siegel, Jay Anderson
- http://arxiv.org/abs/1611.02282
Hubble Space Telescope Proper Motions along the Sagittarius Stream. I. Observations and Results for Stars in Four Fields
- Volume 10, Issue 16 - article #28
- Sangmo Tony Sohn, Roeland P. van der Marel, Jeffrey L. Carlin, Steven R. Majewski, Nitya Kallivayalil, David R. Law, Jay Anderson, and Michael H. Siegel
- The Astrophysical Journal - Volume: 803, Issue: 2
- View article PDF (2.09 MB)
The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo
- Volume 8, Issue 18 - article #22
- Michael Boylan-Kolchin, James S. Bullock, Sangmo Tony Sohn, Gurtina Besla, and Roeland P. van der Marel
- The Astrophysical Journal - Volume: 768, Issue: 2
- Abstract References Cited by Full text PDF (3.18 MB) Enhanced article HTML
The Space Motion of Leo I: Hubble Space Telescope Proper Motion and Implied Orbit
- Volume 8, Issue 18 - article #23
- Sangmo Tony Sohn, Gurtina Besla, Roeland P. van der Marel, Michael Boylan-Kolchin, Steven R. Majewski, and James S. Bullock
- The Astrophysical Journal - Volume: 768, Issue: 2
- Abstract References Full text PDF (5.60 MB) Enhanced article HTML
Wide-field Multiband Photometry of Globular Cluster Systems in the Fornax Galaxy Cluster
- Volume 8, Issue 3 - article #38
- Hak-Sub Kim, Suk-Jin Yoon, Sangmo Tony Sohn, Sang Chul Kim, Eunhyeuk Kim, Chul Chung, Sang-Yoon Lee, and Young-Wook Lee
- The Astrophysical Journal - Volume: 763, Issue: 1
- Abstract References Full text PDF (11.29 MB) Enhanced article HTML
The Space Motion of Leo I: Hubble Space Telescope Proper Motion and Implied Orbit
- Volume 7, Issue 43 - article #9
- Sangmo Tony Sohn (1), Gurtina Besla (2), Roeland P. van der Marel (1), Michael Boylan-Kolchin (3), Steven R. Majewski (4), James S. Bullock (3) ((1) STScI, (2) Columbia University, (3) UC Irvine, (4) University of Virginia)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 26 Oct
- arXiv:1210.6039 [pdf, ps, other]
The Space Motion of Leo I: The Mass of the Milky Way's Dark Matter Halo
- Volume 7, Issue 43 - article #10
- Michael Boylan-Kolchin (1), James S. Bullock (1), Sangmo Tony Sohn (2), Gurtina Besla (3), Roeland P. van der Marel (2) ((1) UC Irvine, (2) STScI, (3) Columbia University)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 26 Oct
- arXiv:1210.6046 [pdf, other]
The M31 Velocity Vector. I. Hubble Space Telescope Proper-motion Measurements
- Volume 7, Issue 24 - article #22
- Sangmo Tony Sohn, Jay Anderson, and Roeland P. van der Marel
- The Astrophysical Journal - Volume: 753, Issue: 1
- Abstract References Full text PDF (4.16 MB) View as HTML
The M31 Velocity Vector. II. Radial Orbit toward the Milky Way and Implied Local Group Mass
- Volume 7, Issue 24 - article #23
- Roeland P. van der Marel, Mark Fardal, Gurtina Besla, Rachael L. Beaton, Sangmo Tony Sohn, Jay Anderson, Tom Brown, and Puragra Guhathakurta
- The Astrophysical Journal - Volume: 753, Issue: 1
- Abstract References Full text PDF (652 KB) View as HTML
The M31 Velocity Vector. III. Future Milky Way M31–M33 Orbital Evolution, Merging, and Fate of the Sun
- Volume 7, Issue 24 - article #24
- Roeland P. van der Marel, Gurtina Besla, T. J. Cox, Sangmo Tony Sohn, and Jay Anderson
- The Astrophysical Journal - Volume: 753, Issue: 1
- Abstract References Full text PDF (3.56 MB) HTML with Enhancements
The M31 Velocity Vector. I. Hubble Space Telescope Proper Motion Measurements
- Volume 7, Issue 22 - article #12
- Sangmo Tony Sohn, Jay Anderson, Roeland P. van der Marel (STScI)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 1 Jun
- arXiv:1205.6863 [pdf, ps, other]
The M31 Velocity Vector. II. Radial Orbit Towards the Milky Way and Implied Local Group Mass
- Volume 7, Issue 22 - article #13
- Roeland P. van der Marel (1), Mark Fardal (2), Gurtina Besla (3), Rachael L. Beaton (4), Sangmo Tony Sohn (1), Jay Anderson (1), Tom Brown (1), Puragra Guhathakurta (5) ((1) STScI, (2) U of Massachusetts, (3) Columbia U, (4) U of Virginia, (5) UC Santa Cruz)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 1 Jun
- arXiv:1205.6864 [pdf, ps, other]
The M31 Velocity Vector. III. Future Milky Way-M31-M33 Orbital Evolution, Merging, and Fate of the Sun
- Volume 7, Issue 22 - article #14
- Roeland P. van der Marel (1), Gurtina Besla (2), T. J. Cox (3), Sangmo Tony Sohn (1), Jay Anderson (1) ((1) STScI, (2) Columbia U, (3) Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 1 Jun
- arXiv:1205.6865 [pdf, ps, other]
Multi-element Abundance Measurements from Medium-resolution Spectra. IV. Alpha Element Distributions in Milky Way Satellite Galaxies
- Volume 6, Issue 23 - article #29
- Evan N. Kirby, Judith. G. Cohen, Graeme H. Smith, Steven R. Majewski, Sangmo Tony Sohn and Puragra Guhathakurta
- The Astrophysical Journal - Volume: 727, Issue: 2
- Abstract References Cited by Full text PDF (4.26 MB) View as HTML
Multi-Element Abundance Measurements from Medium-Resolution Spectra. II. Catalog of Stars in Milky Way Dwarf Satellite Galaxies
- Volume 5, Issue 48 - article #9
- Evan N. Kirby (1), Puragra Guhathakurta (2), Joshua D. Simon (3), Marla C. Geha (4), Constance M. Rockosi (2), Christopher Sneden (5), Judith G. Cohen (1), Sangmo Tony Sohn (6), Steven R. Majewski (7), Michael Siegel (8) ((1) Caltech, (2) UC Santa Cruz, (3) Carnegie Observatories, (4) Yale, (5) UT Austin, (6) STScI, (7) Univ. of Virginia, (8) Penn State)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 25 Nov
- arXiv:1011.4516 [pdf, ps, other]
Multi-Element Abundance Measurements from Medium-Resolution Spectra. IV. Alpha Element Distributions in Milky Way Dwarf Satellite Galaxies
- Volume 5, Issue 48 - article #11
- Evan N. Kirby (1), Judith G. Cohen (1), Graeme H. Smith (2), Steven R. Majewski (3), Sangmo Tony Sohn (4), Puragra Guhathakurta (2) ((1) Caltech, (2) UC Santa Cruz, (3) Univ. of Virginia, (4) STScI)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 25 Nov
- arXiv:1011.5221 [pdf, ps, other]
The Presence of Two Distinct Red Giant Branches in the Globular Cluster NGC 1851
- Volume 4, Issue 50 - article #33
- <em >Sang-Il Han, Young-Wook Lee, Seok-Joo Joo, Sangmo Tony Sohn, Suk-Jin Yoon, Hak-Sub Kim, and Jae-Woo Lee</em&gt,
- The Astrophysical Journal Letters - Volume: 707, Issue: 2
- Abstract | References
The Presence of Two Distinct Red Giant Branches in the Globular Cluster NGC 1851
- Volume 4, Issue 48 - article #18
- Sang-Il Han, Young-Wook Lee, Seok-Joo Joo, Sangmo Tony Sohn, Suk-Jin Yoon, Hak-Sub Kim, Jae-Woo Lee
- arXiv.org - Astrophysics - Volume: 2009, Issue: 26 Nov
- arXiv:0911.5356 [ps, pdf, other]
Exploring Halo Substructure with Giant Stars. XI. The Tidal Tails of the Carina Dwarf Spheroidal Galaxy and the Discovery of Magellanic Cloud Stars in the Carina Foreground
- Volume 1, Issue 34 - article #1
- Ricardo R. Muñoz, Steven R. Majewski, Simone Zaggia, William E. Kunkel, Peter M. Frinchaboy, David L. Nidever, Denija Crnojevic, Richard J. Patterson, Jeffrey D. Crane, Kathryn V. Johnston, Sangmo Tony Sohn, Rebecca Bernstein, and Stephen Shectman
- The Astrophysical Journal - Volume649, Issue 1
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (13553 kB), PS
Exploring Halo Substructure with Giant Stars XI: The Tidal Tails of the Carina Dwarf Spheroidal and the Discovery of Magellanic Cloud Stars in the Carina Foreground
- Volume 1, Issue 15 - article #17
- Ricardo R. Munoz, Steven R. Majewski, Simone Zaggia, William E. Kunkel, Peter M. Frinchaboy, David L. Nidever, Denija Crnojevic, Richard J. Patterson, Jeffrey D. Crane, Kathryn V. Johnston, Sangmo Tony Sohn, Rebecca Bernstein, Stephen Shectman
- ArXiv - Astrophysics
- astro-ph/0605098 [abs, ps, pdf, other]

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