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MOA-2010-BLG-311 : A Planetary Candidate below the Threshold of Reliable Detection


Yee, J.C.; ...; Dominis Prester, Dijana; ...; Wambsgans, J.
MOA-2010-BLG-311 : A Planetary Candidate below the Threshold of Reliable Detection // The Astrophysical journal, 769 (2013), 1; 77-1 (međunarodna recenzija, članak, znanstveni)


Naslov
MOA-2010-BLG-311 : A Planetary Candidate below the Threshold of Reliable Detection

Autori
Yee, J.C. ; ... ; Dominis Prester, Dijana ; ... ; Wambsgans, J.

Izvornik
The Astrophysical journal (0004-637X) 769 (2013), 1; 77-1

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

Ključne riječi
Galaxy: bulge; gravitational lensing: micro; planets and satellites: detection

Sažetak
We analyze MOA-2010-BLG-311, a high magnification (A max > 600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a point lens and a two-body lens model and find that the two-body lens model is a better fit but with only Δχ2 ~ 80. The preferred mass ratio between the lens star and its companion is q = 10-3.7 ± 0.1, placing the candidate companion in the planetary regime. Despite the formal significance of the planet, we show that because of systematics in the data the evidence for a planetary companion to the lens is too tenuous to claim a secure detection. When combined with analyses of other high-magnification events, this event helps empirically define the threshold for reliable planet detection in high-magnification events, which remains an open question.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
316-0000000-2824 - Dijagnostika i fizička svojstva cirkumstelarne tvari (Dubravka Kotnik-Karuza, )

Ustanove
Sveučilište u Rijeci - Odjel za fiziku

Autor s matičnim brojem:
Dijana Dominis Prester, (241452)

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus