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Title: Optical Depth from Realistic Microlensing Models of M31

Abstract

We provide a set of microlensing optical depth maps for M31. Optical depths toward Andromeda were calculated on the basis of a four-component model of the lens and source populations: disk and bulge sources lensed by bulge, M31 halo, and Galactic halo lenses. We confirm the high optical depth and the strong optical depth gradient along the M31 minor axis due to a dark halo of lenses and also discuss the magnitude of the self-lensing due to the bulge. We explore how the shape of the optical depth maps to M31 vary with the halo parameters core radius and flattening. (c) 2000 The American Astronomical Society.

Authors:
;
Publication Date:
OSTI Identifier:
20217582
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 535; Journal Issue: 2; Other Information: PBD: 1 Jun 2000; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GALAXIES; OPTICAL DEPTH CURVE; GRAVITATIONAL LENSES; MATHEMATICAL MODELS; INTERSTELLAR SPACE; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Gyuk, Geza, and Crotts, Arlin. Optical Depth from Realistic Microlensing Models of M31. United States: N. p., 2000. Web. doi:10.1086/308896.
Gyuk, Geza, & Crotts, Arlin. Optical Depth from Realistic Microlensing Models of M31. United States. doi:10.1086/308896.
Gyuk, Geza, and Crotts, Arlin. Thu . "Optical Depth from Realistic Microlensing Models of M31". United States. doi:10.1086/308896.
@article{osti_20217582,
title = {Optical Depth from Realistic Microlensing Models of M31},
author = {Gyuk, Geza and Crotts, Arlin},
abstractNote = {We provide a set of microlensing optical depth maps for M31. Optical depths toward Andromeda were calculated on the basis of a four-component model of the lens and source populations: disk and bulge sources lensed by bulge, M31 halo, and Galactic halo lenses. We confirm the high optical depth and the strong optical depth gradient along the M31 minor axis due to a dark halo of lenses and also discuss the magnitude of the self-lensing due to the bulge. We explore how the shape of the optical depth maps to M31 vary with the halo parameters core radius and flattening. (c) 2000 The American Astronomical Society.},
doi = {10.1086/308896},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 535,
place = {United States},
year = {2000},
month = {6}
}