Confirmation of Black Hole, Planetary, and Binary Microlensing Events

Details Confirmation of Black Hole, Planetary, and Binary Microlensing Events Confirmation of Black Hole, Planetary, and Binary Microlensing Events

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8654b&link_type=abstract

HST Proposal ID #8654

Computer Science

Hst Proposal Id #8654 Stellar Populations

Scientific paper

We propose WFPC2 images of five MACHO Project microlensing events in order to confirm our microlensing models which indicate that these events were caused by black holes and stars with extra-solar planets. Our microlensing parallax fits for MACHO-96-BLG-5 and MACHO-97-BLG-6 indicate that the lenses are likely to be black holes of 40M{sun} and 8M{sun}, respectively, and we can test these models by comparing the amount of stellar blended predicted by the model with the blended determined from the WFPC2 images. For the large mass black hole candidate MACHO-96-BLG-5, we propose a time series of observations to follow the declining magnification of 0.4 mag over the next several years as predicted by the microlensing model. For the two extra-solar planet candidates reported by the Microlensing Planet Search {MPS} Collaboration, MACHO-97-BLG-41 and MACHO-98-BLG-35, we propose to test the planetary microlensing models by determining the amount of blending between each source star and its neighbors. Our observations of MACHO-97-BLG-41, will serve as a first epoch for the possible observation of this triple lens system moving away from the source star. Finally, we propose to image binary lensing event MACHO-98-SMC-1 to test our ability to determine the location of the lens systems for such events.

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