Stellar Variability in the Sub-Horizontal Branch Region of the LMC

Details Stellar Variability in the Sub-Horizontal Branch Region of the LMC Stellar Variability in the Sub-Horizontal Branch Region of the LMC

2005-09-23

arxiv.org/abs/astro-ph/0509724v1

Mem.Soc.Ast.It.77:338-339,2006

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure. To appear in the Proceedings of the Workshop "Stellar pulsation and evolution" (June 19-24, 2005, Monte Por

Scientific paper

We present the initial results from an in-depth re-examination of the MACHO project Large Magellanic Cloud database to identify and characterize stellar variability near the intersection of the instability strip and the main sequence. This dataset's long time-series and uniform photometry is an unprecedented resource for describing the frequency and regions of incidence of various radial and non-radial modes of excitation. The raw MACHO photometry has been investigated to identify factors responsible for most of the residual photometric variance and increase the sensitivity to small amplitudes. We present details of the search method used, the Delta Scuti variables detected thus far and discuss the implications for the completed survey.

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