NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Finite source sizes and the information content of macho-type lens search light curvesIf the dark halo matter is primarily composed of Massive Compact Halo Objects (MACHOs) toward the lower end of the possible detection range (less than 10(exp -3) solar mass) a fraction of the lens detection events should involve the lens crossing directly in front of the disk of the background star. Previously, Nemiroff has shown that each crossing would create an inflection point in the light curve of the MACHO event. Such inflection points would allow a measure of the time it took for the lens to cross the stellar disk. Given an independent estimate of the stellar radius by other methods, one could then obtain a more accurate estimate of the velocity of the lens. This velocity could then, in turn, be used to obtain a more accurate estimate of the mass range for the MACHO or disk star doing the lensing.
Document ID
19950033998
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Nemiroff, Robert J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wickramasinghe, W. A. D. T.
(University of Pennsylvania, Philadelphia, PA United States)
Date Acquired
August 16, 2013
Publication Date
March 20, 1994
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 424
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A65597
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available