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Title: Gravitational microlensing as a method of detecting disk dark matter and faint disk stars

Abstract

Gravitational microlensing of stars in the Galactic bulge is proposed as a method of probing the mass density of disk objects in the 0.001 to 0.1 solar mass range. A substantial rate is found if disk dark matter of this form exists, and even without any dark matter, a significant microlensing rate is found, owing to the faint low-mass disk stars which are known to exist. Such a search would provide new information on the disk dark matter question, probe the low-end stellar mass function, and also search for halo dark matter, all with rates comparable to those expected for the ongoing LMC microlensing halo dark matter searches. 17 refs.

Authors:
; ; ; ;  [1]
  1. California, University, Berkeley (USA) Lawrence Livermore National Laboratory, Livermore, CA (USA)
Publication Date:
OSTI Identifier:
5587561
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal; (United States)
Additional Journal Information:
Journal Volume: 372; Other Information: L79-L82; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MILKY WAY; NONLUMINOUS MATTER; DETECTION; BINARY STARS; GRAVITATIONAL LENSES; MASS; MORPHOLOGY; STARS; GALAXIES; LENSES; MATTER; 640105* - Astrophysics & Cosmology- Galaxies

Citation Formats

Griest, K, Alcock, C, Axelrod, T S, Bennett, D P, and Cook, K H. Gravitational microlensing as a method of detecting disk dark matter and faint disk stars. United States: N. p., 1991. Web. doi:10.1086/186028.
Griest, K, Alcock, C, Axelrod, T S, Bennett, D P, & Cook, K H. Gravitational microlensing as a method of detecting disk dark matter and faint disk stars. United States. doi:10.1086/186028.
Griest, K, Alcock, C, Axelrod, T S, Bennett, D P, and Cook, K H. Wed . "Gravitational microlensing as a method of detecting disk dark matter and faint disk stars". United States. doi:10.1086/186028.
@article{osti_5587561,
title = {Gravitational microlensing as a method of detecting disk dark matter and faint disk stars},
author = {Griest, K and Alcock, C and Axelrod, T S and Bennett, D P and Cook, K H},
abstractNote = {Gravitational microlensing of stars in the Galactic bulge is proposed as a method of probing the mass density of disk objects in the 0.001 to 0.1 solar mass range. A substantial rate is found if disk dark matter of this form exists, and even without any dark matter, a significant microlensing rate is found, owing to the faint low-mass disk stars which are known to exist. Such a search would provide new information on the disk dark matter question, probe the low-end stellar mass function, and also search for halo dark matter, all with rates comparable to those expected for the ongoing LMC microlensing halo dark matter searches. 17 refs.},
doi = {10.1086/186028},
journal = {Astrophysical Journal; (United States)},
issn = {0004-637X},
number = ,
volume = 372,
place = {United States},
year = {1991},
month = {5}
}