[Phys-seminars] 2017-01-24 Astrophysics and Cosmology Seminar

griv griv at bgu.ac.il
Sun Jan 22 10:37:03 IST 2017

Astrophysics and Cosmology Seminar

 DATE: 24-01-17

 TIME: 13:30

 PLACE: Seminar Room 207, Building 54

Observational Studies of Exoplanets –- Transits and More

Dr. Aviv Ofir, Weizmann Institute

How can one study objects one cannot even see? In this talk I will start by shortly reviewing the different observational techniques used for studying exoplanets: radial velocity, microlensing, direct imaging, astrometry and transits, before focusing on transits. These are usually thought of as the passage of a circular black disk in front of a luminous one, but this description is extremely simplistic and ignores a multitude of other effects. Indeed, detailed transit analysis can help to constrain a surprisingly large number of exoplanetary parameters: from planetary system formation and system architecture, through bulk and atmospheric compositions, to moons and rings, and to global weather patterns and biomarkers detection. These prospects underline the major shift in the focus of the exoplanets community from planet detection to planet characterization. The relentless pace of discoveries during the past two decades, about these objects that one cannot even see, is expecte
 d to continue and even intensify in the future.

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