Mass Determination with Gravitational Microlensing | Zendy

Shude Mao | Zendy; B. Paczyński | Zendy

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Mass Determination with Gravitational Microlensing

Author(s) -

Shude Mao,

B. Paczyński

Publication year - 1996

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/178126

Subject(s) - gravitational microlensing , gravitational lens , mass distribution , physics , lens (geology) , gravitation , monte carlo method , kinematics , distribution (mathematics) , astrophysics , stars , astronomy , classical mechanics , optics , mathematics , mathematical analysis , galaxy , statistics , redshift

We present a simple toy model of the distribution of objects responsible forgravitational microlensing. We use Monte Carlo simulations to demonstrate howdifficult it is to determine the parameters of the lens mass distribution onthe basis of the observed distribution of event time scales. A robustdetermination requires $ \sim 100 $ events, or more, even if the geometry oflens distribution, and the lens kinematics are known.Comment: 19 pages in postscript (four figures included), submitted to Ap

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