The DOI matches its Crossref record; 55 of the 55 references it cites were found in a registry or an index.
CONSTRAINING THE MILKY WAY POTENTIAL WITH A SIX-DIMENSIONAL PHASE-SPACE MAP OF THE GD-1 STELLAR STREAM
Open accessAbstract
The narrow GD-1 stream of stars, spanning 60° on the sky at a distance of ∼10 kpc from the Sun and ∼15 kpc from the Galactic center, is presumed to be debris from a tidally disrupted star cluster that traces out a test-particle orbit in the Milky Way halo. We combine Sloan Digital Sky Survey (SDSS) photometry, USNO-B astrometry, and SDSS and Calar Alto spectroscopy to construct a complete, empirical six-dimensional (6D) phase-space map of the stream. We find that an eccentric orbit in a flattened isothermal potential describes this phase-space map well. Even after marginalizing over the stream orbital parameters and the distance from the Sun to the Galactic center, the orbital fit to GD-1 places strong constraints on the circular velocity at the Sun's radius V c = 224 ± 13 km s −1 and total potential flattening q Φ = 0.87 +0.07 −0.04 . When we drop any informative priors on V c , the GD-1 constraint becomes V c = 221 ± 18 km s −1 . Our 6D map of GD-1, therefore, yields the best current constraint on V c and the only strong constraint on q Φ at Galactocentric radii near R ∼ 15 kpc. Much, if not all, of the total potential flattening may be attributed to the mass in the stellar disk, so the GD-1 constraints on the flattening of the halo itself are weak: q Φ,halo > 0.89 at 90% confidence. The greatest uncertainty in the 6D map and the orbital analysis stems from the photometric distances, which will be obviated by GAIA .
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Citations
Cites
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THE SEVENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY
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MONITORING STELLAR ORBITS AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER
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SEGUE: A SPECTROSCOPIC SURVEY OF 240,000 STARS WITH g = 14-20
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MethodSelf-citationGAIA: Composition, formation and evolution of the Galaxy
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Cited by
The Galaxy in Context: Structural, Kinematic, and Integrated Properties
Bland-Hawthorn, J., & Gerhard, O. (2016) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081915-023441 · Cited by 1,656
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The Galactic Center massive black hole and nuclear star cluster
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The Dark Energy Survey: more than dark energy – an overview
(2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stw641 · Cited by 1,019
LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey's science plan
Deng, L.-C., Newberg, H. J., Liu, C., Carlin, J. L., Beers, T. C., Chen, L., Chen, Y.-Q., Christlieb, N., Grillmair, C. J., Guhathakurta, P., et al. (2012) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/12/7/003 · Cited by 554
Metadata
- Authors
- Koposov, S. E., Rix, H.-W., & Hogg, D. W.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2010-02-26
- Volume
- 712
- Issue
- 1
- Pages
- 260-273
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2045976894
- Cited by
- 411
- References
- 55
- FWCI
- 12.95
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Koposov, S. E., Rix, H.-W., & Hogg, D. W. (2010). CONSTRAINING THE MILKY WAY POTENTIAL WITH A SIX-DIMENSIONAL PHASE-SPACE MAP OF THE GD-1 STELLAR STREAM. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/712/1/260
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