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Subaru Seminars are usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you would like to give a seminar, please contact Subaru seminar organizers (Rusu Cristian Eduard, Tae-Soo Pyo, Nagayoshi Ohashi) by email : sseminar_at_subaru.naoj.org (please change"_at" to @).

January 31, Wednesday, 10am in 104A

" Study of Exoplanets and Stellar Remnants through Gravitational Microlensing "

Dr. Kailash Sahu (Space Telescope Science Institute)


Gravitational microlensing provides a powerful tool to study a wide range of astrophysical phenomena -- from detecting dark matter and exoplanets to measuring the masses of white dwarfs, neutron stars and black holes. After an introduction to microlensing, I will discuss the results on planet detections through microlensing, with a special emphasis on the results from the PLANET collaboration. I will also discuss the detection of transiting planets around stars in the Galactic bulge through our SWEEPS program with HST, and subsequent implications on the frequency of exoplanets across the Milky Way. I will then discuss our astrometric microlensing measurements by the nearby white dwarf Stein 2051 B -- the first such measurement by a star outside the solar system -- to determine its mass. Finally, I will discuss our HST programs aimed at the first detections of isolated stellar-mass black holes and their mass measurements.


Seminars are also held at JAC, CFHT, and IfA.



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