| dc.contributor.author | Chapman, Scott C. | en_US |
| dc.contributor.author | Ibata, Rodrigo | en_US |
| dc.contributor.author | Lewis, Geraint F. | en_US |
| dc.contributor.author | Ferguson, Annette M. N. | en_US |
| dc.contributor.author | Irwin, Mike | en_US |
| dc.contributor.author | McConnachie, Alan | en_US |
| dc.contributor.author | Tanvir, Nial | en_US |
| dc.date.accessioned | 2014-03-12T19:21:08Z | |
| dc.date.available | 2014-03-12T19:21:08Z | |
| dc.date.issued | 2005-10-20 | en_US |
| dc.identifier.citation | Chapman, Scott C., Rodrigo Ibata, Geraint F. Lewis, Annette M. N. Ferguson, et al. 2005. "A Keck/DEIMOS Kinematic Study of Andromeda IX: dark matter on the smallest galactic scales." The Astrophysical Journal 632(2): 87-L90 | en_US |
| dc.identifier.issn | 0004-637X | en_US |
| dc.identifier.uri | http://dx.doi.org/10.1086/497686 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/45540 | |
| dc.description.abstract | We present the results of a kinematic survey of the dwarf spheroidal satellite of M31, And-IX, which appears to be the lowest surface brightness and also the faintest galaxy (M_V = -8.3) found to date. Using Keck/DEIMOS spectroscopic data, we have measured its velocity relative to M31, its velocity dispersion, and its metallicity. It exhibits a significant velocity dispersion sigma_v = 6.8+3.0-2.0km/s, which coupled with the low luminosity implies a very high mass to V-band light ratio, M/L ~ 93+120-50msun/lsun (M/L > 17msun/lsun at 99% confidence). Unless strong tidal forces have perturbed this system, this smallest of galaxies is a highly dark matter dominated system. | en_US |
| dc.title | A Keck/DEIMOS Kinematic Study of Andromeda IX: dark matter on the smallest galactic scales | en_US |
| dc.title.alternative | The Astrophysical Journal | en_US |
| dc.type | article | en_US |
| dc.identifier.volume | 632 | en_US |
| dc.identifier.issue | 2 | en_US |
| dc.identifier.startpage | 87 | en_US |
