Optical gravitational lensing experiment: OGLE-1999-BUL-19 – the first multipeak parallax event
نویسندگان
چکیده
منابع مشابه
Optical Gravitational Lensing Experiment. OGLE-1999-BUL-19: The First Multi-Peak Parallax Event
We describe a highly unusual microlensing event, OGLE-1999-BUL-19. Unlike most standard microlensing events, this event exhibits multiple peaks in its light curve. The Einstein radius crossing time for this event is approximately one year, which is unusually long. We show that the additional peaks in the light curve can be caused by the very small value for the relative transverse velocity of t...
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We describe the discovery of the longest microlensing event ever observed, OGLE-1999-BUL-32, also independently identified by the MACHO collaboration as MACHO-99-BLG-22. This unique event has an Einstein radius crossing time of 641 days. The high quality data obtained with difference image analysis shows a small but significant parallax signature. This parallax effect allows one to determine th...
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The cosmological density of compact objects in the range 10 10 is currently uncertain. Potentially important components to the density of the universe include stars, MAssive Compact Halo Objects (MACHOs), and massive black holes. Here one hypothetical path to estimating the space density of these objects is proposed: the simultaneous measurement by separated observers of compact sources at cosm...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2002
ISSN: 1365-2966,0035-8711
DOI: 10.1046/j.1365-8711.2002.05811.x