Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group

Details Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6964c&link_type=abstract

HST Proposal ID #6964

Computer Science

Hst Proposal Id #6964 Stellar Populations

Scientific paper

The M81 group is one of the nearest groups of galaxies to ourown but its properties are quite different from that of theLocal Group. It has therefore provided a differentevolutionary environment for its member galaxies. This teamhas carried out a CCD survey of the M81 group to search foranalogs to the Local Group dwarf spheroidal (dSph) galaxies.We have recovered all of the M81 dwarf candidates previouslyidentified in photographic surveys and, in addition, havediscovered six new systems whose surface brightnesses andapparent sizes place them within the range of values found forthe Local Group dSphs. In this proposal we request HST timeto image two of the candidate M81 group dSph systems. Theproposed observations will allow construction of color-magnitude diagrams covering the upper two magnitudes of thered giant branch and will allow a determination of theirdistance (via the luminosity of the giant branch tip), anestimate of their mean abundance (via the mean giant branchcolor) and a first estimate of their star formation history(via the frequency of occurrence of upper-AGB stars).Comparison of these results with those for the Local GroupdSphs will then help define the dependence of the formationand evolution of these low luminosity galaxies on the localconditions.

Affiliated with

Also associated with

No associations

Rating

Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group 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 Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photometry of Candidate Dwarf Spheroidal Galaxies in the M81 Group will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1172278