[ExI] Scientists Find Solar System Like Ours

Amara Graps amara at amara.com
Sat Feb 16 06:16:16 UTC 2008

>I am curious, could microlensing be performed with a galaxy aligned in
>the background instead of another star? Seems to me that that would
>greatly increase the technique's usefulness.

My guess is that one needs a point source, not an extended source, in
order to extract the events cleanly from the photometric light curve.
Look at Figures 1 and 2 of the paper; there are five identifiable
(clean) features of the light curve; some of which I think could
get smeared if the source were extended. But this is just my guess.
Thanks for the Valentines Smooch!


Amara Graps, PhD      www.amara.com
Research Scientist, Southwest Research Institute (SwRI), Boulder, Colorado

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