Previous abstract Next abstract

Session 96 - Cepheids and Supergiant Variable Stars.
Display session, Thursday, January 16
Metropolitan Ballroom,

[96.12] Periodic Variable Star Timing with MACHO Lightcurves

M. Pratt, A. Becker, C. Stubbs (CfPA/U Washington), C. Alcock, D. Alves, K. Cook, S. Marshall, D. Minniti (LLNL), R. Allsman (ANUSF), T. Axelrod, K. Freeman, B. Peterson, A. Rodgers (MSSSO), D. Bennett (Notre Dame), K. Griest, J. Guern, M. Lehner, T. Vandehei (CfPA/UCSD), P. Quinn (ESO), W. Sutherland (Oxford), D. Welch (McMaster)

The MACHO data archive contains many thousands of periodic variable stars with very dense phase coverage acquired over four years of \simnightly observations. We analyze each lightcurve to determine a phase delay time series and identify long term phase delay structure. A number of astrophysical processes, including orbital displacement and period evolution, can produce phase delay signals. We present here an outline of this technique and a number of interesting results found in the set of LMC Cepheid stars.

If you would like more information about this abstract, please follow the link to wwwmacho.mcmaster.ca. This link was provided by the author. When you follow it, you will leave the the Web space for this meeting; to return, you should use the Back button on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: mrp@astro.washington.edu

Program listing for Thursday