Naslov
MOA-2010-BLG-328Lb : A Sub-Neptune Orbiting very Late M Dwarf?

Autori
Furusawa, K. ; ... ; Dominis Prester, Dijana ; ... ; Zub, M.

Izvornik
The Astrophysical journal (0004-637X) 779 (2013), 2; 91-1

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

Ključne riječi
gravitational lensing: micro; planetary systems

Sažetak
We analyze the planetary microlensing event MOA-2010-BLG-328. The best fit yields host and planetary masses of M h = 0.11 ± 0.01 M ☉ and M p = 9.2 ± 2.2 M ⊕, corresponding to a very late M dwarf and sub-Neptune-mass planet, respectively. The system lies at D L = 0.81 ± 0.10 kpc with projected separation r = 0.92 ± 0.16 AU. Because of the host's a priori unlikely close distance, as well as the unusual nature of the system, we consider the possibility that the microlens parallax signal, which determines the host gravitational lensing: micro, planetary systems mass and distance, is actually due to xallarap (source orbital motion) that is being misinterpreted as parallax. We show a result that favors the parallax solution, even given its close host distance. We show that future high-resolution astrometric measurements could decisively resolve the remaining ambiguity of these solutions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA