RR Lyrae Variables in Local Group Galaxies

Details RR Lyrae Variables in Local Group Galaxies RR Lyrae Variables in Local Group Galaxies

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hst..prop11277s&link_type=abstract

HST Proposal ID #11277. Cycle 16

Physics

Scientific paper

We propose to reduce and analyze WFPC2 images of 5 Local Group galaxies in order to identify and characterize their RR Lyrae variables. These galaxies, which include NGC 147, IC 10, LGS 3, Tucana, and Andromeda V, have no published variability studies using HST imaging.The presence of RR Lyrae variables would suggest that an old Age >~ 10 Gyr stellar population is present in these galaxies. In additon, because the minimum-light color of ab-type RR Lyraes is a constant irrespective of metallicity or period, these stars can be used to study the extinction properties of each galaxy. Furthermore, the period of ab-type RR Lyraes is directly related to their metal abundance so that we can also study the metallicity distribution function of each galaxy. Lastly, it is well known that RR Lyraes are excellent distance indicators allowing us to measure the distance of each galaxy.;

Affiliated with

Also associated with

No associations

Rating

RR Lyrae Variables in Local Group 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 Variables in Local Group Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RR Lyrae Variables in Local Group Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-781188