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Pregled bibliografske jedinice broj: 661758

Časopis

Autori: Choi, J-Y.; ...; Dominis Prester, Dijana; ...; treet, R.A.
Naslov: Microlensing Discovery of a Population of Very Tight, Very Low Mass Binary Brown Dwarfs
Izvornik: The Astrophysical Journal (0004-637X) 768 (2013), 2; 129-1-129-7
Vrsta rada: članak
Ključne riječi: binaries: general; gravitational lensing: micro
Sažetak:
Although many models have been proposed, the physical mechanisms responsible for the formation of low-mass brown dwarfs (BDs) are poorly understood. The multiplicity properties and minimum mass of the BD mass function provide critical empirical diagnostics of these mechanisms. We present the discovery via gravitational microlensing of two very low mass, very tight binary systems. These binaries have directly and precisely measured total system masses of 0.025 M ⊙ and 0.034 M ⊙, and projected separations of 0.31 AU and 0.19 AU, making them the lowest-mass and tightest field BD binaries known. The discovery of a population of such binaries indicates that BD binaries can robustly form at least down to masses of ~0.02 M ⊙. Future microlensing surveys will measure a mass-selected sample of BD binary systems, which can then be directly compared to similar samples of stellar binaries.
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://adsabs.harvard.edu/abs/2013ApJ...768..129C
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/768/2/129
URL cjelovitog teksta:
Google Scholar: Microlensing Discovery of a Population of Very Tight, Very Low Mass Binary Brown Dwarfs
Upisao u CROSBI: Dijana Dominis Prester (dijana@phy.uniri.hr), 7. Pro. 2013. u 06:14 sati



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