Presenter Information

Vincent Debiase, SUNY OswegoFollow

Academic Field

Physics, Astronomy

Faculty Mentor Name

Shashi Kanbur

Presentation Type

Oral Presentation

Abstract

We consider the use of conditional entropy methods to detect the periods of variable stars. We apply this method to the almost 20,000 Cepheids and RR Lyrae stars in the OGLE III database. Such pulsating stars are very important for establishing the size and age scales in the Universe and the accurate detection of the period is a crucial step.The Conditional Entropy method produces results in very good agreement with existing methods such as Lomb-Scargle, but there are some differences, particularly at short periods. We discuss these differences, mostly in multimodal stars and comment on avenues for future research.

Keywords

Astrophysics, Variable Stars, Period detection

Start Date

10-4-2015 9:30 AM

End Date

10-4-2015 11:00 AM

Location

Holmes Hall 204

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Apr 10th, 9:30 AM Apr 10th, 11:00 AM

Conditional Entropy Methods for Period Detection in Variable Stars

Holmes Hall 204

We consider the use of conditional entropy methods to detect the periods of variable stars. We apply this method to the almost 20,000 Cepheids and RR Lyrae stars in the OGLE III database. Such pulsating stars are very important for establishing the size and age scales in the Universe and the accurate detection of the period is a crucial step.The Conditional Entropy method produces results in very good agreement with existing methods such as Lomb-Scargle, but there are some differences, particularly at short periods. We discuss these differences, mostly in multimodal stars and comment on avenues for future research.