Naslov
Pathway to the Galactic Distribution of Planets: Combined Spitzer and Ground-Based Microlens Parallax Measurements of 21 Single-Lens Events

Autori
Calchi Novati, S. ; ... ; Dominis Prester, Dijana ; ... ; Lončarić, Klaudija ; ... ; DePoy, D. L.

Izvornik
The Astrophysical journal (0004-637X) 804 (2015), 1; 20-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
gravitational lensing: micro — planets

Sažetak
We present microlens parallax measurements for 21 (apparently) isolated lenses observed toward the Galactic bulge that were imaged simultaneously from Earth and Spitzer, which was ~1 AU West of Earth in projection. We combine these measurements with a kinematic model of the Galaxy to derive distance estimates for each lens, with error bars that are small compared to the Sun's Galactocentric distance. The ensemble therefore yields a well-defined cumulative distribution of lens distances. In principle it is possible to compare this distribution against a set of planets detected in the same experiment in order to measure the Galactic distribution of planets. Since these Spitzer observations yielded only one planet, this is not yet possible in practice. However, it will become possible as larger samples are accumulated.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
OGLE Collaboration ; PLANET Collaboration ; MOA Collaboration ; Wise Group ; RoboNet Collaboration ; MiNDSTEp Consortium ; μFUN Collaboration.

POVEZANOST RADA