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The Cepheids Variable Stars Population in the Local Group Dwarf Irregular Galaxy Pegasus

Published online by Cambridge University Press:  01 December 2006

I. Meschin ,
C. Gallart ,
S. Cassisi ,
A. Aparicio  and
A. Rosenberg
I. Meschin
Affiliation:
Instituto de Astrofísica de Canarias. 38200 La Laguna. Tenerife, Canary Islands. Spain email: [email protected]
C. Gallart
Affiliation:
Instituto de Astrofísica de Canarias. 38200 La Laguna. Tenerife, Canary Islands. Spain email: [email protected]
S. Cassisi
Affiliation:
INAF – Osservatorio Astronomico di Teramo, Teramo, Italy
A. Aparicio
Affiliation:
Instituto de Astrofísica de Canarias. 38200 La Laguna. Tenerife, Canary Islands. Spain email: [email protected] Departamento de Astrofísica, Universidad de La Laguna, Tenerife, Spain
A. Rosenberg
Affiliation:
Instituto de Astrofísica de Canarias. 38200 La Laguna. Tenerife, Canary Islands. Spain email: [email protected]
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Abstract

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We present the result of a search for Cepheids in the Local Group dwarf irregular galaxy (DIG) Pegasus. We identified 20 Cepheid stars with periods 0d.6 < P < 15d.3. We have compared them with previously published Cepheids and we have carried out an accurate completeness analysis in order to obtain the fraction of them which are lost. Using their period-luminosity relation we obtain a distance for Pegasus of 950±30 Kpc.

Keywords

local group galaxies: individual (Pegasus,DDO216,UGC12613) — galaxies: dwarf — galaxies: stellar content — stars: variables: Cepheids
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S241: Stellar Populations as Building Blocks of Galaxies , December 2006 , pp. 365 - 366
Copyright
Copyright © International Astronomical Union 2007

References

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