First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM

Details First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21012110l&link_type=abstract

American Astronomical Society Meeting 210, #121.10; Bulletin of the American Astronomical Society, Vol. 39, p.329

Statistics

Scientific paper

A metallicity distribution for the central bar region of the dwarf irregular galaxy WLM is presented from VLT FORS2 spectra of 46 red giant stars, as well as radial velocities for the member stars in this field. The [Fe/H] values were derived using the near infrared Ca II triplet lines as a tracer of metallicity (see Grocholski et al. 2006, Rutledge et al. 1997) and is conformed to a metallicity scale with the aid of four calibrating globular clusters. Although limited by small number statistics in this preliminary release, the ability to study the metallicitiy with respect to velocity and physical location of the member stars is invaluable in helping to characterize the formation and enrichment history of these kind of stellar populations - as has been found from CaT analysis of RGB stars in the Sculptor and Fornax galaxies. (Tolstoy et al. 2004, Battaglia et al. 2006) Specifically, the metallicty distribution for the WLM stellar population(s) can be tied to the recent HST star formation history study (Dolphin, 2000) which places estimates on the frequency and duration of star formation episodes in WLM. The isolated nature of WLM allows a unique opportunity to analyze the enrichment and star formation history of a low luminosity stellar population, which presumably has had a less complicated evolution due to minimal local group interactions.
Research for this study was funded in part by NSERC Discovery Grant Program #327292-06.

Affiliated with

Also associated with

No associations

Rating

First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM 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 First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and First Metallicty Distribution From CaT Spectroscopy of RGB Stars in the Dwarf Irregular Galaxy WLM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1028204