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Author Coles, Jonathan ♦ Saha, Prasenjit ♦ Schmid, Hans Martin
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 2009-12-02
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword Astrophysics - Solar and Stellar Astrophysics ♦ Astrophysics - Instrumentation and Methods for Astrophysics ♦ physics:astro-ph
Abstract A nearby star having a near-transit of a galaxy will cause a time-dependent weak lensing of the galaxy. Because the effect is small, we refer to this as weak microlensing. This could provide a useful method to weigh low-mass stars and brown dwarfs. We examine the feasibility of measuring masses in this way and we find that a star causes measurable weak microlensing in a galaxy even at 10 Einstein radii away. Of order one magnitude I < 25 galaxy comes close enough to one or other of the ~100 nearest stars per year.
Description Comment: Accepted for publication in MNRAS (4 pages, 5 figures, 1 table)
Educational Use Research
Learning Resource Type Article
Page Count 4


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