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Pregled bibliografske jedinice broj: 661757

Časopis

Autori: Hwang, K-H.; ...; Dominis Prester, Dijana; ...; street, R.A.
Naslov: Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486
Izvornik: The Astrophysical Journal (0004-637X) 778 (2013), 1; 55-1-55-6
Vrsta rada: članak
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.
Projekt / tema: 316-0000000-2824
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 661757.1308.5762v1.pdf (tekst priložen 27. Kol. 2014. u 13:14 sati)
URL Internet adrese: http://arxiv.org/abs/1308.5762
URL cjelovitog teksta:
Google Scholar: Interpretation of a Short-term Anomaly in the Gravitational Microlensing Event MOA-2012-BLG-486
Upisao u CROSBI: Dijana Dominis Prester (dijana@phy.uniri.hr), 7. Pro. 2013. u 06:10 sati



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