NOAO >   Observing Info >   Approved Programs >   2009B-0153

Small NOAO Logo

Proposal Information for 2009B-0153


PI: Noel D. Richardson, Georgia State University, richardson@chara.gsu.edu
Address: Physics Department, P.O. Box 4106, Atlanta, GA 30302-4106, U.S.A.

CoI: Douglas Gies, Georgia State University

Title: Spectroscopic Monitoring of Luminous Blue Variables

Abstract: Luminous Blue Variables (LBVs) are massive stars that have attained a very bright and unstable stage in their lives. Their properties and the processes causing their variability are not well understood. Long- term changes are documented for a number of LBVs, but the timescales for different kinds of variability are not well characterized for the population as a whole. We have begun a survey to examine the long term behavior of LBVs through spectroscopy and photometry. Our goal is to continue monitoring a sample of 14 LBVs spectroscopically using the CTIO 1.5 m and the Cassegrain Spectrograph, and to monitor \eta Carinae with the Bench Mounted Echelle spectrograph on the CTIO 1.5 m. With a combination of these data and archival data, our analysis will lead to a better understanding of the mechanisms that cause the long term variability and will help us place this population in the context of massive stellar evolution.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2009B-0153

noaoprop-help@noao.edu

Small NOAO Logo