Spitzer Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-rotating Low-mass Brown Dwarf

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Fältnamn	Indikatorer	Metadata
000		05333naa a2201105 4500
001		oai:DiVA.org:su-166674
003		SwePub
008		190306s2019 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1666742 URI
024	7	a https://doi.org/10.3847/1538-3881/aafe122 DOI
040		a (SwePub)su
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Shvartzvald, Yossi4 aut
245	1 0	a Spitzer Microlensing Parallax for OGLE-2017-BLG-0896 Reveals a Counter-rotating Low-mass Brown Dwarf
264		c 2019-02-11
264	1	b American Astronomical Society,c 2019
338		a print2 rdacarrier
520		a The kinematics of isolated brown dwarfs in the Galaxy, beyond the solar neighborhood, is virtually unknown. Microlensing has the potential to probe this hidden population, as it can measure both the mass and five of the six phase-space coordinates (all except the radial velocity) even of a dark isolated lens. However, the measurements of both the microlens-parallax and finite-source effects are needed in order to recover the full information. Here, we combine the Spitzer satellite parallax measurement with the ground-based light curve, which exhibits strong finite-source effects, of event OGLE-2017-BLG-0896. We find two degenerate solutions for the lens (due to the known satellite-parallax degeneracy), which are consistent with each other except for their proper motion. The lens is an isolated brown dwarf with a mass of either 18 +/- 1 M-J or 20 +/- 1 M-J. This is the lowest isolated-object mass measurement to date, only similar to 45% more massive than the theoretical deuterium-fusion boundary at solar metallicity, which is the common definition of a free-floating planet. The brown dwarf is located at either 3.9 +/- 0.1 kpc or 4.1 +/- 0.1 kpc toward the Galactic bulge, but with proper motion in the opposite direction of disk stars, with one solution suggesting it is moving within the Galactic plane. While it is possibly a halo brown dwarf, it might also represent a different, unknown population.
650	7	a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650	7	a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653		a Galaxy: bulge
653		a gravitational lensing: micro
700	1	a Yee, Jennifer C.4 aut
700	1	a Skowron, Jan4 aut
700	1	a Lee, Chung-Uk4 aut
700	1	a Udalski, Andrzej4 aut
700	1	a Novati, Sebastiano Calchi4 aut
700	1	a Bozza, Valerio4 aut
700	1	a Beichman, Charles A.4 aut
700	1	a Bryden, Geoffery4 aut
700	1	a Carey, Sean4 aut
700	1	a Gaudi, B. Scott4 aut
700	1	a Henderson, Calen B.4 aut
700	1	a Zhu, Wei4 aut
700	1	a Bachelet, Etienne4 aut
700	1	a Bolt, Greg4 aut
700	1	a Christie, Grant4 aut
700	1	a Maoz, Dan4 aut
700	1	a Natusch, Tim4 aut
700	1	a Pogge, Richard W.4 aut
700	1	a Street, Rachel A.4 aut
700	1	a Tan, Thiam-Guan4 aut
700	1	a Tsapras, Yiannis4 aut
700	1	a Pietrukowicz, Pawel4 aut
700	1	a Soszynski, Igor4 aut
700	1	a Szymanski, Michal K.4 aut
700	1	a Mroz, Przemek4 aut
700	1	a Poleski, Radoslaw4 aut
700	1	a Kozlowski, Szymon4 aut
700	1	a Ulaczyk, Krzysztof4 aut
700	1	a Pawlak, Michal4 aut
700	1	a Rybicki, Krzysztof A.4 aut
700	1	a Iwanek, Patryk4 aut
700	1	a Albrow, Michael D.4 aut
700	1	a Cha, Sang-Mok4 aut
700	1	a Chung, Sun-Ju4 aut
700	1	a Gould, Andrew4 aut
700	1	a Han, Cheongho4 aut
700	1	a Hwang, Kyu-Ha4 aut
700	1	a Jung, Youn Kil4 aut
700	1	a Kim, Dong-Jin4 aut
700	1	a Kim, Hyoun-Woo4 aut
700	1	a Kim, Seung-Lee4 aut
700	1	a Lee, Dong-Joo4 aut
700	1	a Lee, Yongseok4 aut
700	1	a Park, Byeong-Gon4 aut
700	1	a Ryu, Yoon-Hyun4 aut
700	1	a Shin, In-Gu4 aut
700	1	a Zang, Weicheng4 aut
700	1	a Dominik, Martin4 aut
700	1	a Helling, Christiane4 aut
700	1	a Hundertmark, Markus4 aut
700	1	a Jorgensen, Uffe G.4 aut
700	1	a Longa-Pena, Penelope4 aut
700	1	a Lowry, Stephen4 aut
700	1	a Sajadian, Sedighe4 aut
700	1	a Burgdorf, Martin J.4 aut
700	1	a Campbell-White, Justyn4 aut
700	1	a Ciceri, Simonau Stockholms universitet,Institutionen för astronomi4 aut0 (Swepub:su)scice
700	1	a Evans, Daniel F.4 aut
700	1	a Fujii, Yuri4 aut
700	1	a Hinse, Tobias C.4 aut
700	1	a Rahvar, Sohrab4 aut
700	1	a Rabus, Markus4 aut
700	1	a Skottfelt, Jesper4 aut
700	1	a Snodgrass, Colin4 aut
700	1	a Southworth, John4 aut
710	2	a Stockholms universitetb Institutionen för astronomi4 org
773	0	t Astronomical Journald : American Astronomical Societyg 157:3q 157:3x 0004-6256x 1538-3881
856	4	u https://discovery.dundee.ac.uk/ws/files/36093646/Shvartzvald_2019_AJ_157_106.pdf
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-166674
856	4 8	u https://doi.org/10.3847/1538-3881/aafe12

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Av författaren/redakt...: Shvartzvald, Yos ...; Yee, Jennifer C.; Skowron, Jan; Lee, Chung-Uk; Udalski, Andrzej; Novati, Sebastia ...; visa fler...; Bozza, Valerio; Beichman, Charle ...; Bryden, Geoffery; Carey, Sean; Gaudi, B. Scott; Henderson, Calen ...; Zhu, Wei; Bachelet, Etienn ...; Bolt, Greg; Christie, Grant; Maoz, Dan; Natusch, Tim; Pogge, Richard W ...; Street, Rachel A ...; Tan, Thiam-Guan; Tsapras, Yiannis; Pietrukowicz, Pa ...; Soszynski, Igor; Szymanski, Micha ...; Mroz, Przemek; Poleski, Radosla ...; Kozlowski, Szymo ...; Ulaczyk, Krzyszt ...; Pawlak, Michal; Rybicki, Krzyszt ...; Iwanek, Patryk; Albrow, Michael ...; Cha, Sang-Mok; Chung, Sun-Ju; Gould, Andrew; Han, Cheongho; Hwang, Kyu-Ha; Jung, Youn Kil; Kim, Dong-Jin; Kim, Hyoun-Woo; Kim, Seung-Lee; Lee, Dong-Joo; Lee, Yongseok; Park, Byeong-Gon; Ryu, Yoon-Hyun; Shin, In-Gu; Zang, Weicheng; Dominik, Martin; Helling, Christi ...; Hundertmark, Mar ...; Jorgensen, Uffe ...; Longa-Pena, Pene ...; Lowry, Stephen; Sajadian, Sedigh ...; Burgdorf, Martin ...; Campbell-White, ...; Ciceri, Simona; Evans, Daniel F.; Fujii, Yuri; Hinse, Tobias C.; Rahvar, Sohrab; Rabus, Markus; Skottfelt, Jespe ...; Snodgrass, Colin; Southworth, John; visa färre...

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