Sökning: WFRF:(Lee Stephen) > Spitzer Microlensin...
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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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