THE FIRST SIMULTANEOUS MICROLENSING OBSERVATIONS BY TWO SPACE TELESCOPES: SPITZER AND SWIFT REVEAL A BROWN DWARF IN EVENT OGLE-2015-BLG-1319

	THE FIRST SIMULTANEOUS MICROLENSING OBSERVATIONS BY TWO SPACE TELESCOPES: SPITZER AND SWIFT REVEAL A BROWN DWARF IN EVENT OGLE-2015-BLG-1319
	Shvartzvald, Y.1; Li, Z.2; Udalski, A.3; Gould, A.4; Sumi, T.5; Street, R. A.2; Novati, S. Calchi 6,7,8; Hundertmark, M.9,10; Bozza, V.8,11; Beichman, C.12
刊名	ASTROPHYSICAL JOURNAL
	2016-11-10
卷号	831 期号:2
关键词	binaries: general brown dwarfs Galaxy: bulge gravitational lensing: micro
英文摘要	Simultaneous observations of microlensing events from multiple locations allow for the breaking of degeneracies between the physical properties of the lensing system, specifically by exploring different regions of the lens plane and by directly measuring the "microlens parallax." We report the discovery of a 30-65M(J) brown dwarf orbiting a K dwarf in the microlensing event OGLE-2015-BLG-1319. The system is located at a distance of similar to 5 kpc toward the Galactic Bulge. The event was observed by several ground-based groups as well as by Spitzer and Swift, allowing a measurement of the physical properties. However, the event is still subject to an eight-fold degeneracy, in particular the well-known close-wide degeneracy, and thus the projected separation between the two lens components is either similar to 0.25 au or similar to 45 au. This is the first microlensing event observed by Swift, with the UVOT camera. We study the region of microlensing parameter space to which Swift is sensitive, finding that though Swift could not measure the microlens parallax with respect to ground-based observations for this event, it can be important for other events. Specifically, it is important for detecting nearby brown dwarfs and free-floating planets in high magnification events.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GRAVITATIONAL LENSING EXPERIMENT ; PARALLAX SATELLITE MASS ; GALACTIC BULGE ; PLANET SENSITIVITY ; OGLE-III ; BINARY ; STARS ; PHOTOMETRY ; CAUSTICS ; SYSTEMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000400474400003
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8851]
专题	国家天文台_星系宇宙学研究部
作者单位	1.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA 2.Las Cumbres Observ Global Telescope Network, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA 3.Univ Warsaw Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland 4.Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA 5.Osaka Univ, Dept Earth & Space Sci, Osaka 5600043, Japan 6.CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA 7.CALTECH, NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA 8.Univ Salerno, Dipartimento Fis ER Caianiello, Via Giovanni Paolo 2 132, I-84084 Fisciano, Italy 9.Univ Copenhagen, Niels Bohr Inst, Oster Voldgade 5, DK-1350 Copenhagen, Denmark 10.Univ Copenhagen, Ctr Star & Planet Format, Oster Voldgade 5, DK-1350 Copenhagen, Denmark
推荐引用方式 GB/T 7714	Shvartzvald, Y.,Li, Z.,Udalski, A.,et al. THE FIRST SIMULTANEOUS MICROLENSING OBSERVATIONS BY TWO SPACE TELESCOPES: SPITZER AND SWIFT REVEAL A BROWN DWARF IN EVENT OGLE-2015-BLG-1319[J]. ASTROPHYSICAL JOURNAL,2016,831(2).
APA	Shvartzvald, Y..,Li, Z..,Udalski, A..,Gould, A..,Sumi, T..,...&Swift.(2016).THE FIRST SIMULTANEOUS MICROLENSING OBSERVATIONS BY TWO SPACE TELESCOPES: SPITZER AND SWIFT REVEAL A BROWN DWARF IN EVENT OGLE-2015-BLG-1319.ASTROPHYSICAL JOURNAL,831(2).
MLA	Shvartzvald, Y.,et al."THE FIRST SIMULTANEOUS MICROLENSING OBSERVATIONS BY TWO SPACE TELESCOPES: SPITZER AND SWIFT REVEAL A BROWN DWARF IN EVENT OGLE-2015-BLG-1319".ASTROPHYSICAL JOURNAL 831.2(2016).