Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 660670.0, MPI für Astronomie / Publikationen_mpia
Microlensig binaries with candidate brown dwarf companions
Authors:Shin, I. -. G.; Han, C.; Gould, A.; Udalski, A.; Sumi, T.; Dominik, M.; Beaulieu, J. -. P.; Tsapras, Y.; Bozza, V.; Szymański, M. K.; Kubiak, M.; Soszyński, I.; Pietrzyński, G.; Poleski, R.; Ulaczyk, K.; Pietrukowicz, P.; Kozłowski, S.; Skowron, J.; Wyrzykowski, Å. .; Abe, F.; Bennett, D. P.; Bond, I. A.; Botzler, C. S.; Freeman, M.; Fukui, A.; Furusawa, K.; Hayashi, F.; Hearnshaw, J. B.; Hosaka, S.; Itow, Y.; Kamiya, K.; Kilmartin, P. M.; Kobara, S.; Korpela, A.; Lin, W.; Ling, C. H.; Makita, S.; Masuda, K.; Matsubara, Y.; Miyake, N.; Muraki, Y.; Nagaya, M.; Nishimoto, K.; Ohnishi, K.; Okumura, T.; Omori, K.; Perrott, Y. C.; Rattenbury, N.; Saito, T.; Skuljan, L.; Sullivan, D. J.; Suzuki, D.; Sweatman, W. L.; Tristram, P. J.; Wada, K.; Yock, P. C. M.; Christie, G. W.; Depoy, D. L.; Dong, S.; Gal-Yam, A.; Gaudi, B. S.; Hung, L. -. W.; Janczak, J.; Kaspi, S.; Maoz, D.; McCormick, J.; McGregor, D.; Moorhouse, D.; Muñoz, J. A.; Natusch, T.; Nelson, C.; Pogge, R. W.; Tan, T. -. G.; Polishook, D.; Shvartzvald, Y.; Shporer, A.; Thornley, G.; Malamud, U.; Yee, J. C.; Choi, J. -. Y.; Jung, Y. -. K.; Park, H.; Lee, C. -. U.; Park, B. -. G.; Koo, J. -. R.; Bajek, D.; Bramich, D. M.; Browne, P.; Horne, K.; Ipatov, S.; Snodgrass, C.; Steele, I.; Street, R.; Alsubai, K. A.; Burgdorf, M. J.; Calchi Novati, S.; Dodds, P.; Dreizler, S.; Fang, X. -. S.; Grundahl, F.
Date of Publication (YYYY-MM-DD):2012
Journal Abbrev.:The Astrophysical Journal
Volume:760
Issue / Number:2
Start Page:id. 116
Audience:Not Specified
Abstract / Description:Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation history. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during 2004 - 2011 observation seasons. Based on the low mass ratio criterion of q < 0.2, we found 7 candidate events, including 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 mass 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.
Free Keywords:Astrophysics - Solar and Stellar Astrophysics
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012arXiv1208.2323S
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.