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Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486


Hwang, K-H.; ...; Dominis Prester, Dijana; ...; street, R.A.
Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486 // The Astrophysical Journal, 778 (2013), 1; 55-1 (međunarodna recenzija, članak, znanstveni)


Naslov
Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486

Autori
Hwang, K-H. ; ... ; Dominis Prester, Dijana ; ... ; street, R.A.

Izvornik
The Astrophysical Journal (0004-637X) 778 (2013), 1; 55-1

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

Ključne riječi
Binaries: general; gravitational lensing: micro; planets and satellites: detection

Sažetak
A planetary microlensing signal is generally characterized by a short-term perturbation to the standard single lensing light curve. A subset of binary-source events can produce perturbations that mimic planetary signals, thereby introducing an ambiguity between the planetary and binary-source interpretations. In this paper, we present the analysis of the microlensing event MOA-2012-BLG-486, for which the light curve exhibits a short-lived perturbation. Routine modeling not considering data taken in different passbands yields a best-fit planetary model that is slightly preferred over the best-fit binary-source model. However, when allowed for a change in the color during the perturbation, we find that the binary-source model yields a significantly better fit and thus the degeneracy is clearly resolved. This event not only signifies the importance of considering various interpretations of short-term anomalies, but also demonstrates the importance of multi-band data for checking the possibility of false-positive planetary signals.

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