AGAPE: a search for dark matter in M31 by microlensing effects on unresolved stars

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Gondolo, Paolo
Other Author Ansari, R.; Auriere, M.; Baillon, P.; Bouquet, A.; Coupinot, G.; Coutures, C.; Ghesquiere, C.; Giraud-Heraud, Y.; Hecquet, J.; Kaplan, J.; Le Du, Y.; Melchior, A. L.; Moniez, M.; Picat, J. P.; Soucail, G.
Title AGAPE: a search for dark matter in M31 by microlensing effects on unresolved stars
Date 1997
Description M 31 is a very tempting target for a microlensing search of compact objects in galactic haloes. It is the nearest large galaxy, it probably has its own dark halo, and its tilted position with respect to the line of sight provides an unmistakable signature of microlensing. However most stars of M 31 are not resolved and one has to use the \pixel method": monitor the pixels of the image rather than the stars. AGAPE is the implementation of this idea. Data have been collected and treated during two autumns of observation at the 2 metre telescope of Pic du Midi. The process of geometric and photometric alignment, which must be performed before constructing pixel light curves, is described. Seeing variations are minimised by working with large super-pixels (2:1") compared with the average seeing.
Type Text
Publisher EDP Sciences
First Page 843
Last Page 856
Subject M31; AGAPE; Pixel method; Galaxy; Halo; Cosmology; Gravitational lensing
Subject LCSH Dark matter (Astronomy); Andromeda Galaxy; Microlensing (Astrophysics)
Language eng
Bibliographic Citation Ansari, R., Auriere, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, C., Ghesquiere, C., Giraud- Heraud, Y., Gondolo, P., Hecquet, J., Kaplan, J., Le Du, Y., Melchior, A. L., Moniez, M., Picat, J. P., & Soucail, G. (1997). AGAPE: a search for dark matter in M31 by microlensing effects on unresolved stars. Astronomy and Astrophysics, 324, 843-56.
Rights Management (c)EDP Sciences http://publications.edpsciences.org/
Format Medium application/pdf
Format Extent 908,376 bytes
Identifier ir-main,9250
ARK ark:/87278/s6xd1jv7
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 703155
Reference URL https://collections.lib.utah.edu/ark:/87278/s6xd1jv7
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