other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2007MNRAS.380.1127M - Mon. Not. R. Astron. Soc., 380, 1127-1140 (2007/September-3)
Blue straggler stars in dwarf spheroidal galaxies.
MAPELLI M., RIPAMONTI E., TOLSTOY E., SIGURDSSON S., IRWIN M.J. and BATTAGLIA G.
Abstract (from CDS):
BSS candidates are uniformly distributed through the host galaxy, whereas a young population is expected to show a more clumpy distribution. Furthermore, the observed radial distribution of BSSs, normalized to both red giant branch (RGB) and horizontal branch (HB) stars, is almost flat, with a slight decrease towards the centre. Such a distribution is at odds with the predictions for a young stellar population, which should be more concentrated. Instead, it is consistent with model predictions for BSS formation by mass transfer in binaries (MT-BSSs). Such results, although not decisive, suggest that these candidates are indeed BSSs and that MT-BSSs form in the same way in Draco and Ursa Minor as in globular clusters. This favours the conclusion that Draco and Ursa Minor are truly `fossil' galaxies, where star formation ceased completely more than 8 billion years ago.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): stellar dynamics - blue stragglers - galaxies: dwarf - galaxies: individual: Draco - galaxies: individual: Ursa Minor
Simbad objects: 10
To bookmark this query, right click on this link: simbad:2007MNRAS.380.1127M and select 'bookmark this link' or equivalent in the popup menu