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[Fizinfo] csillagda szeminariuma


Chronological Thread 
  • From: uhlar AT konkoly.hu (Karola_Uhlar)
  • To: fizinfo AT lists.kfki.hu
  • Subject: [Fizinfo] csillagda szeminariuma
  • Date: Fri, 13 Apr 2012 16:13:51 +0200 (CEST)
  • List-archive: <http://mailman.kfki.hu/pipermail/fizinfo>
  • List-id: ELFT HÍRADÓ <fizinfo.lists.kfki.hu>

Meghívó
az MTA CSFK Csillagászati Intézete
szemináriumára

Elõadó: David Heyrovsky (Charles University, Prague)

Cím: Detecting Planets by Gravitational Microlensing

Kivonat:
The two main techniques for finding exoplanets, the Doppler and planetary
transit methods, are both sensitive primarily to close-in giant planets.
In comparison, gravitational microlensing enables the detection of other
types of planets, such as Earth-mass planets at AU separations from their
host stars. The gravitational microlensing effect occurs when a
stellar-mass object passes in the foreground of a distant observed star,
located for example in the Galactic Bulge. During the course of the
passage the gravitational field of the object temporarily amplifies the
light from the background star. The structure of the measured light curve
of such a microlensing event depends on the nature of the lensing object.
Usually the lens is just a single star or a binary star, but occasionally
the lens is found to be a star with one or more planets. In this seminar I
will describe the technique, the planets detected by it so far, and
discuss its prospects for the future.

Az elõadás idõpontja: 2012. április 19., csütörtök 14 óra

Helye: MTA CSFK CSI elõadóterme Budapest, XII., Konkoly Thege M. út 15-17.





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