Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-02-08
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Invited talk presented at the B. V. Kukarkin Centenary Conference: Variable Stars, the Galactic Halo, and Galaxy Formation, Oc
Scientific paper
With ages comparable to the age of the Universe, the variable stars of RR Lyrae type have eyewitnessed the formation of their host galaxies, and thus can provide information on the processes that led to the assembling of large galaxies such as the Milky Way and the Andromeda galaxy. The present knowledge of the RR Lyrae population in Local Group dwarf spheroidal galaxies is reviewed,calling attention to the "ultra-faint" spheroidal systems recently discovered around the Milky Way by the Sloan Digital Sky Survey. The properties of the RR Lyrae stars and the Oosterhoff dichotomy observed for Galactic globular clusters and field RR Lyrae stars are discussed, since they put constrain on the possibility that the Milky Way and Andromeda halos were built up from protogalactic fragments resembling the dwarf spheroidals we observe today.
No associations
LandOfFree
RR Lyrae Stars in Dwarf Spheroidal Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with RR Lyrae Stars in Dwarf Spheroidal Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RR Lyrae Stars in Dwarf Spheroidal Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-308049