AGAPE: andromeda gravitational amplification pixel experiment

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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, Ch.; Ghesquiere, C.; Giraud-Heraud, Y.; Hecquet, J.; Kaplan, J.; Le Du, Y.; Melchior, A. L.; Moniez, M., Picat, J. P.; Soucail, G.
Title AGAPE: andromeda gravitational amplification pixel experiment
Date 1997
Description The aim of the AGAPE (Andromeda Gravitational Ampli_x000C_cation Pixel Experiment), experiment which has been _x000C_rst proposed in June 1992 is to examine the distribution of massive astrophysical compact halo objects ((MACHO's) which possibly are in the galactic haloes and which could account for the missing dark matter. Those objects have a mass which is a fraction of solar mass and could be detected by gravitational microlensing: the light of a star is ampli_x000C_ed when a MACHO is crossing its line of sight from the earth. This technique has been proposed by Paczynskiin 1986. The AGAPE collaboration applies this technique in an original way by using, as target stars, the stars of another galaxy without resolving them. The recent progresses in photometry with CCD allow now to see tiny variations of the surface brightness of a galaxy like M 31. Those tiny variations can be the result of a single microlensing event on the background stars contributing to the surface brightness. The AGAPE collaboration has now cumulated 82 nights of observation over 3 years at the 2m Bernard Lyot Telescope situated at Pic du Midi de Bigorre in the French Pyrenees and has found variations compatible with microlensing events.
Type Text
Publisher European Organization for Nuclear Research
First Page 1
Last Page 9
Subject AGAPE; Andromeda Gravitational Amplification Pixel Experiment; Microlensing; MACHO; Massive compact halo objects
Subject LCSH Andromeda Galaxy; Gravitation; Galactic halos; Dark matter (Astronomy)
Language eng
Bibliographic Citation Ansari, R., Auriere, M., Baillon, P., Bouquet, A., Coupinot, G., Coutures, Ch., Ghesqui`ere, 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: andromeda gravitational amplification pixel experiment. Particles and Cosmology, 9th International Baksan School, 1-9. April, 15-22.
Rights Management (c)European Organization for Nuclear Research
Format Medium application/pdf
Format Extent 773,810 bytes
Identifier ir-main,9296
ARK ark:/87278/s6qn6rcw
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706635
Reference URL https://collections.lib.utah.edu/ark:/87278/s6qn6rcw
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