Searching for extrasolar planetsusing microlensing

eBiblioteka

 
 

Searching for extrasolar planetsusing microlensing

Show simple item record

dc.contributor.author Dominis Prester, Dijana
dc.date.accessioned 2011-01-20T12:14:08Z
dc.date.available 2011-01-20T12:14:08Z
dc.date.issued 2007
dc.identifier.isbn 978-86-80019-26-0 en_US
dc.identifier.uri http://hdl.handle.net/123456789/1520
dc.description.provenance Submitted by Slavisha Milisavljevic (slavisha) on 2011-01-20T12:14:08Z No. of bitstreams: 1 dominis-prester1.pdf: 2761961 bytes, checksum: 7e675bc762fd0f869538391cbbe1aa53 (MD5) en
dc.description.provenance Made available in DSpace on 2011-01-20T12:14:08Z (GMT). No. of bitstreams: 1 dominis-prester1.pdf: 2761961 bytes, checksum: 7e675bc762fd0f869538391cbbe1aa53 (MD5) Previous issue date: 2007 en
dc.language.iso en en_US
dc.publisher Astronomical Observatory Belgrade en_US
dc.title Searching for extrasolar planetsusing microlensing en_US
mf.subject.keywords Gravitational microlensing can reveal extrasolar planets orbiting the foreground lens stars if the light curves are measured frequently enough to characterize planetary light curves with features lasting a few hours. Microlensing is most sensitive to planets in Earth-to Jupiter-like orbits with semi-major axis in the range 1-5 AU. We (PLANET, OGLE and MOA collaborations) have detected a 5.5 Earth mass planet named OGLE-2005-BLG-390Lb orbiting a 2.2 solar mass M-dwarf host star at a separation of 2.6 AU, at a distance of 6.6kpc. This is the lowest-mass and the coolest extrasolar planet, out of more than 200 planets discovered up to date. Our detection, together with a latter detection of OGLE-2005-BLG-169Lb, suggests that cool, sub-Neptune-mass may be more common than gas giant planets, as predicted by the core accretion theory. The basics of microlensing will be explained, and microlensing surveys towards the Galactic Bulge searching for extrasolar planets presented, with special emphasis on the role of binary stars as lenses and sources. Numerical optimization methods for light curve modeling and breaking ambiuguitis in light curve solutions will be discussed, explained using the example of OGLE-2005-BLG-390Lb planet discovery. Some new ideas and methods for improving planet detection by microlensing will be presented. en_US
mf.document.pages 69 en_US
mf.contributor.editor-in-chief Dimitrijević, S. Milan
mf.contributor.technical-editor Milovanov, Tatjana

Files in this item

Files Size Format View
dominis-prester1.pdf 2.761Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record