Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/mnras/stw191 |
The frequency of snowline-region planets from four years of OGLE-MOA-Wise second-generation microlensing | |
Shvartzvald, Y.1; Maoz, D.1; Udalski, A.2; Sumi, T.3; Friedmann, M.1; Kaspi, S.1; Poleski, R.4; Szymanski, M. K.2; Skowron, J.2; Kozlowski, S.2; Wyrzykowski, L.2; Mroz, P.2; Pietrukowicz, P.2; Pietrzynski, G.2; Soszynski, I.2; Ulaczyk, K.5; Abe, F.6; Barry, R. K.7; Bennett, D. P.8; Bhattacharya, A.8; Bond, I. A.9; Freeman, M.10; Inayama, K.11; Itow, Y.6; Koshimoto, N.3; Ling, C. H.9; Masuda, K.6; Fukui, A.12; Matsubara, Y.6; Muraki, Y.6; Ohnishi, K.13; Rattenbury, N. J.10; Saito, To.14; Sullivan, D. J.15; Suzuki, D.8; Tristram, P. J.16; Wakiyama, Y.6; Yonehara, A.11 | |
通讯作者 | Shvartzvald, Y. |
来源期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
![]() |
ISSN | 0035-8711 |
EISSN | 1365-2966 |
出版年 | 2016 |
卷号 | 457期号:4页码:4089-4113 |
英文摘要 | We present a statistical analysis of the first four seasons from a ’second-generation’ microlensing survey for extrasolar planets, consisting of near-continuous time coverage of 8 deg(2) of the Galactic bulge by the Optical Gravitational Lens Experiment (OGLE), Microlensing Observations in Astrophysics (MOA), and Wise microlensing surveys. During this period, 224 microlensing events were observed by all three groups. Over 12 per cent of the events showed a deviation from single-lens microlensing, and for similar to one-third of those the anomaly is likely caused by a planetary companion. For each of the 224 events, we have performed numerical ray-tracing simulations to calculate the detection efficiency of possible companions as a function of companion-to-host mass ratio and separation. Accounting for the detection efficiency, we find that 55(-22)(+34) per cent of microlensed stars host a snowline planet. Moreover, we find that Neptune-mass planets are similar to 10 times more common than Jupiter-mass planets. The companion-to-host mass-ratio distribution shows a deficit at q similar to 10(-2), separating the distribution into two companion populations, analogous to the stellar-companion and planet populations, seen in radial-velocity surveys around solar-like stars. Our survey, however, which probes mainly lower mass stars, suggests a minimum in the distribution in the super-Jupiter mass range, and a relatively high occurrence of brown-dwarf companions. |
英文关键词 | gravitational lensing: micro surveys binaries: general planetary systems Galaxy: stellar content |
类型 | Article |
语种 | 英语 |
国家 | Israel ; Poland ; Japan ; USA ; England ; New Zealand |
收录类别 | SCI-E |
WOS记录号 | WOS:000373586000051 |
WOS关键词 | GRAVITATIONAL LENSING EXPERIMENT ; BROWN DWARF DESERT ; EXTRASOLAR PLANETS ; GALACTIC BULGE ; MASS ; EVENTS ; SYSTEMS ; STARS ; MOA-2011-BLG-293LB ; MULTIPLICITY |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/195127 |
作者单位 | 1.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel; 2.Univ Warsaw Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland; 3.Osaka Univ, Dept Earth & Space Sci, Osaka 5600043, Japan; 4.Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA; 5.Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England; 6.Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan; 7.NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA; 8.Univ Notre Dame, Dept Phys, 225 Nieuwland Sci Hall, Notre Dame, IN 46556 USA; 9.Massey Univ, Inst Informat & Math Sci, North Shore Mail Ctr, Private Bag 102-904, Auckland, New Zealand; 10.Univ Auckland, Dept Phys, Private Bag 92-019, Auckland 1001, New Zealand; 11.Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan; 12.Natl Astron Observ Japan, Okayama Astrophys Observ, Asakuchi, Okayama 7190232, Japan; 13.Nagano Natl Coll Technol, Nagano 3818550, Japan; 14.Tokyo Metropolitan Coll Aeronaut, Tokyo 1168523, Japan; 15.Victoria Univ, Sch Chem & Phys Sci, Wellington, New Zealand; 16.Mt John Univ Observ, POB 56, Lake Tekapo 8770, New Zealand |
推荐引用方式 GB/T 7714 | Shvartzvald, Y.,Maoz, D.,Udalski, A.,et al. The frequency of snowline-region planets from four years of OGLE-MOA-Wise second-generation microlensing[J],2016,457(4):4089-4113. |
APA | Shvartzvald, Y..,Maoz, D..,Udalski, A..,Sumi, T..,Friedmann, M..,...&Yonehara, A..(2016).The frequency of snowline-region planets from four years of OGLE-MOA-Wise second-generation microlensing.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,457(4),4089-4113. |
MLA | Shvartzvald, Y.,et al."The frequency of snowline-region planets from four years of OGLE-MOA-Wise second-generation microlensing".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 457.4(2016):4089-4113. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。