NOAO >   Observing Info >   Approved Programs >   2008B-0003

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Proposal Information for 2008B-0003


PI: Edward G. Schmidt, University of Nebraska-Lincoln, eschmidt1@unl.edu
Address: Physics Department, Lincoln, NE 68588-0111, USA

Title: Type II Cepheids and Related Variables

Abstract: While type II Cepheids have considerable potential to contribute to our knowledge of a number of areas of astrophysics, their usefulness is compromised by the relatively small number of such stars known. I have undertaken a project to identify more of them in two large area sky surveys, and to determine some of the basic properties of the stars which are confirmed as type II Cepheids. In the course of this project a significant number of small amplitude stars which appear to be closely related to the type II Cepheids have been identified. The nature of these objects is also being investigated. The photometry portion of the project is complete and spectra were obtained for about half of the stars with the GCAM spectrograph on the 2.1-m telescope. This proposal requests time to obtain spectra for about 2/3 of the remaining stars.


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NOAO >   Observing Info >   Approved Programs >   2008B-0003

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