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Pregled bibliografske jedinice broj: 619100

Časopis

Autori: Shin, I.-G.; ...; Dominis Prester, Dijana; ...; Zub, M.
Naslov: Microlensing Binaries with Candidate Brown Dwarf Companions
Izvornik: The Astrophysical journal (0004-637X) 760 (2012), 2; 116-1-116-10
Vrsta rada: članak
Ključne riječi: binaries: general; brown dwarfs; gravitational lensing: micro
Sažetak:
Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q < 0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 ± 0.01 M sun and 0.019 ± 0.002 M sun for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.
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
URL Internet adrese: http://iopscience.iop.org/0004-637X/760/2/116/article
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/760/2/116
URL cjelovitog teksta:
Google Scholar: Microlensing Binaries with Candidate Brown Dwarf Companions
Upisao u CROSBI: Dijana Dominis Prester (dijana@phy.uniri.hr), 20. Vel. 2013. u 14:33 sati



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