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Detection of a 60°-long Dwarf Galaxy Debris Stream
Open accessAbstract
We report on a 60°-long stream of stars, extending from Ursa Major to Sextans, in the Sloan Digital Sky Survey. The stream is approximately 2° wide and is clearly distinct from the northern tidal arm of the Sagittarius dwarf galaxy. The apparent width of the stream indicates a progenitor with a size and mass similar to that of a dwarf galaxy. The stream is about 21 kpc distant and appears to be oriented almost perpendicular to our line of sight. The visible portion of the stream does not pass near any known dwarf galaxies, although we cannot rule out that the stream may form the inner part of a known dwarf galaxy's orbit. The most likely explanation is that the stream constitutes the remains of a dwarf galaxy that has been completely disrupted at some point in the past. We also briefly report on the discovery of a diminutive Galactic satellite that lies near the projected path of the new stream but is unlikely to be related to it.
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Schlegel, D. J., Finkbeiner, D. P., & Davis, M. (1998) · The Astrophysical Journal · doi:10.1086/305772 · Cited by 15,126
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The Accretion Origin of the Milky Way’s Stellar Halo
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Koposov, S. E., Rix, H.-W., & Hogg, D. W. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/712/1/260 · Cited by 411
Johnston, K. V., Bullock, J. S., Sharma, S., Font, A., Robertson, B. E., & Leitner, S. N. (2008) · The Astrophysical Journal · doi:10.1086/592228 · Cited by 416
Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function
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Metadata
- Authors
- Grillmair, C. J.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2006-06-23
- Volume
- 645
- Issue
- 1
- Pages
- L37-L40
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1979781284
- Cited by
- 239
- References
- 1
- FWCI
- 9.64
- Type
- journal article
- Language
- en
- Open access
- bronze
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