Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-29T19:28:45.778Z Has data issue: false hasContentIssue false
  • English
  • Français

Variable stars from two surveys of microlensing in M31

Published online by Cambridge University Press:  12 April 2016

Arlin P.S. Crotts ,
Richard P. Boyle ,
Christopher J. Corbally  and
the MEGA Collaboration
Arlin P.S. Crotts
Affiliation:
Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027, USA
Richard P. Boyle
Affiliation:
Vatican Observatory Research Group, University of Arizona, Tucson, AZ 85721, USA
Christopher J. Corbally
Affiliation:
Vatican Observatory Research Group, University of Arizona, Tucson, AZ 85721, USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Recently we completed the VATT/Columbia survey monitoring a portion of M31 for microlensing and stellar variability, and report here on the microlensing result. Also, we have nearly completed a much larger survey (MEGA) covering most of the stars in M31, for which we have started cataloging many tens of thousands of Cepheids, Miras, eclipsing variables and other kinds of variable stars. The microlensing results from these two surveys hint that a significant fraction of the dark matter in M31 is composed of stellar-mass objects in the halo.

Type
Part 2. What variable stars tell us about the Local Group, including the distance scale
Information
International Astronomical Union Colloquium , Volume 193: Variable Stars in the Local Group , 2004 , pp. 83 - 86
Copyright
Copyright © Astronomical Society of the Pacific 2004

References

Afonso, C., et al. 2003 A&A, 400, 951 Google Scholar
Alcock, C. et al. 2000 ApJ, 542, 281 CrossRefGoogle Scholar
Baltz, E.A., Gyuk, G., Crotts, A.P.S. 2003 ApJ, 582, 530 CrossRefGoogle Scholar
Calchi Novati, S., et al. 2002 A&A, 381, 848 Google Scholar
Crotts, A.P.S. 1992 ApJ, 399, L43 CrossRefGoogle Scholar
Crotts, A.P.S., Tomaney, A.B.T. 1996 ApJ, 473, L87 CrossRefGoogle Scholar
Crotts, A., et al. 2001, in ASP Conf. Ser., Vol. 239, Microlensing 2000, eds Menzies, J. & Sackett, P. (San Francisco: ASP), 318 Google Scholar
de Jong, J.T.A., et al. 2003. A&A, in press (astro-ph/0307072)Google Scholar
Tomaney, A.B.T., Crotts, A.P.S. 1996 AJ, 112, 2872 CrossRefGoogle Scholar
Uglesich, R.R., Crotts, A.P.S., Baltz, E.A., de Jong, J., Boyle, R.P., Corbally, C.J. 2003, ApJ, submittedGoogle Scholar