The microlensing events in Q2237+0305A: No case against small masses/large sources

Details The microlensing events in Q2237+0305A: No case against small masses/large sources The microlensing events in Q2237+0305A: No case against small masses/large sources

1995-08-23

arxiv.org/abs/astro-ph/9508103v1

IAU Symp. 173 (1996) 255

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure. Uses crckapb.sty. To appear in the Proceedings of the IAU Symposium 173: ``Astrophysical Applications of Gr

Scientific paper

It is demonstrated that the 1988-90 microlensing events in image A of Q2237+0305 reported by Racine (1992) do not exclude microlensing models with very low average mass, making the source radius larger than the projected Einstein radius $\eta_0$ (Refsdal and Stabell 1991, 1993). This is contrary to what has been claimed by Witt and Mao (1994). Since these events are the best resolved microlensing events recorded in Q2237+0305, further work should not exclude the possibility of a large source when interpreting lightcurve data.

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