Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (32) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (3)
· NED Objects (1)
· Reads History
· HEP/Spires Information
·
· Translate This Page
Title:
Probing the Large Magellanic Cloud halo for MACHOs
Authors:
Gould, Andrew
Affiliation:
AA(Inst. for Advanced Study, Princeton, NJ)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 2, p. 451-454. (ApJ Homepage)
Publication Date:
02/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Galactic Halos, Gravitational Lenses, Magellanic Clouds, Dark Matter, Optical Thickness
DOI:
10.1086/172298
Bibliographic Code:
1993ApJ...404..451G

Abstract

If galactic halos are composed of massive compact halo objects (MACHOs) in the mass range M less than about 0.01 M(solar), then ongoing gravitational lensing experiments could be capable of detecting them in the Large Magellanic Cloud (LMC). The signature of LMC (as opposed to Galactic) MACHOs is a variation of the optical depth to lensing as a function of sky position. Assuming that the LMC halo is spherical, the optical depth along lines of sight toward the far side of the LMC disk should be about 20 percent higher than those toward the near side because the former pass through more of the halo. If the LMC halo is oblate, the effect is diminished as the square of the halo flatness ratio. The amplitude of the spatial variation in the lensing rate can therefore provide information about the flattening of the LMC halo.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences


More Article Retrieval Options

HELP for Article Retrieval
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints