BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo

Details BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20713305d&link_type=abstract

American Astronomical Society Meeting 207, #133.05; Bulletin of the American Astronomical Society, Vol. 37, p.1383

Astronomy and Astrophysics

Astrophysics

Scientific paper

We report on UBVRI CCD photometry that has been obtained over the course of the past seven years for a sample of over 1600 metal-poor (MP), field horizontal-branch (FHB), and other A-type candidates selected from two large objective-prism surveys, the HK survey of Beers and collaborators and the Hamburg/ESO stellar survey of Christlieb and colleagues. These stars either have, or soon will have, medium-resolution (1-2 Å) spectroscopy obtained with various 2.5m - 4m class telescopes, including the SOAR 4.1m.
These observations are being employed for several purposes. In the case of the FHB/A stars, the UBV photometry is useful for separating out low-gravity stars from the high-gravity ones. The subsample of high-gravity A-type stars includes Blue Metal Poor stars, halo and thick-disk blue stragglers, main-sequence A-type dwarfs, and Am and Ap stars. These observations are also being used to derive photometric distance estimates that will aid studies of high-velocity hydrogen clouds in the Galaxy, as well as to refine Galactic mass measurements. The data for the low-metallicity objects will be used to obtain estimates of temperatures that are required for elemental abundance studies based on future high-resolution spectroscopic observations, as well as to estimate distances for use in kinematic studies.
T.C.B. and Y.L. acknowledge partial support from grant AST 04-06784, as well as from grant PHY 02-16783, Physics Frontier Center/Joint Institute for Nuclear Astrophysics (JINA), awarded by the US National Science Foundation.

Affiliated with

Also associated with

No associations

Rating

BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo 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 BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BVRI and UBV Photometry of Metal-Poor and Horizontal-Branch Candidates in the Galactic Halo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1285729