Deep Canada-France-Hawaii Telescope photometric survey of the entire M33 galaxy - I. Catalogue of 36 000 variable point sources

被引:60
作者
Hartman, J. D.
Bersier, D.
Stanek, K. Z.
Beaulieu, J. -P.
Kaluzny, J.
Marquette, J. -B.
Stetson, P. B.
Schwarzenberg-Czerny, A.
机构
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
[3] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[4] Univ Paris 06, CNRS, UMR 70951, Inst Astrophys Paris, F-75014 Paris, France
[5] Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland
[6] Natl Res Council Canada, Herzberg Inst Astrophys, Dominion Astrophys Observ, Victoria, BC V9E 2E7, Canada
[7] Adam Mickiewicz Univ Poznan, Astron Observ, PL-60286 Poznan, Poland
关键词
catalogues; surveys; Cepheids; stars : variables : other; galaxies : individual : M33;
D O I
10.1111/j.1365-2966.2006.10764.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have conducted a variability survey of the Local Group galaxy M33, using g', r', and i' observations from 27 nights spanning 17 months, made with the MegaPrime/MegaCam instrument on the 3.6-m Canada-France-Hawaii Telescope (CFHT). We identify more than 36 000 variable sources with g', r', i' less than or similar to 24, out of approximately two million point sources in a 1-deg(2) field of view. This increases the number of known variables in this galaxy by more than a factor of 20. In this paper, we provide a brief description of the data and a general overview of the variable star population which includes more than 1300 candidate variable blue and red supergiant stars, more than 2000 Cepheids, and more than 19 000 long-period variable asymptotic giant branch and red giant branch stars.
引用
收藏
页码:1405 / 1417
页数:13
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