Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8706m&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #87.06; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We present Keck/DEIMOS spectroscopic observations of hundreds of individual red giant branch (RGB) stars in three of Andromeda's dwarf spheroidal galaxies (dSphs) -And I, II, and III. Accurate radial velocities with uncertainties of a few km/s are derived for a subset of these data allowing us to resolve the intrinsic velocity dispersion of each galaxy and place constraints on the mass-to-light ratio of And I, II, and III. Both the photometric and spectroscopic metallicity of each confirmed dSph member is measured independently. We investigate the mean abundance, abundance spread, and radial variation in abundance and velocity and find strong differences between the three galaxies. These differences likely point to unique evolutionary histories for these dSphs.
This research was funded by grants from NSF and NASA/STScI.
Geha Marla
Gilbert Karoline
Guhathakurta Puraga
Kalirai Jason
Majewski Steven R.
No associations
LandOfFree
A Spectroscopic Study of M31 dSphs -Kinematics, Chemical Abundances, and Radial Distributions in And I, II, and III 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 A Spectroscopic Study of M31 dSphs -Kinematics, Chemical Abundances, and Radial Distributions in And I, II, and III, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Spectroscopic Study of M31 dSphs -Kinematics, Chemical Abundances, and Radial Distributions in And I, II, and III will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1158715