PLANET SENSITIVITY FROM COMBINED GROUND- AND SPACE-BASED MICROLENSING OBSERVATIONS

被引：7

作者：

Zhu, Wei ^{[1
]}

Gould, Andrew ^{[1
]}

Beichman, Charles ^{[2
]}

Novati, Sebastiano Calchi ^{[2
,3
,4
]}

Carey, Sean ^{[5
]}

Gaudi, B. Scott ^{[1
]}

Henderson, Calen B. ^{[1
,6
]}

Penny, Matthew ^{[1
]}

Shvartzvald, Yossi ^{[6
]}

Yee, Jennifer C. ^{[7
]}

Udalski, A. ^{[8
]}

Poleski, R. ^{[1
,8
]}

Skowron, J. ^{[8
]}

Kozlowski, S. ^{[8
]}

Mroz, P. ^{[8
]}

Pietrukowicz, P. ^{[8
]}

Pietrzynski, G. ^{[8
]}

Szymanski, M. K. ^{[8
]}

Soszynski, I. ^{[8
]}

Ulaczyk, K. ^{[8
]}

Wyrzykowski, L. ^{[8
]}

Abe, F. ^{[9
]}

Barry, R. K. ^{[10
]}

Bennett, D. P. ^{[11
]}

Bhattacharya, A. ^{[11
]}

Bond, I. A. ^{[12
]}

Freeman, M. ^{[13
]}

Fukui, A. ^{[14
]}

Hirao, Y. ^{[15
]}

Itow, Y. ^{[9
]}

Koshimoto, N. ^{[15
]}

Ling, H. ^{[12
]}

Masuda, K. ^{[9
]}

Matsubara, Y. ^{[9
]}

Muraki, Y. ^{[9
]}

Nagakane, M. ^{[15
]}

Ohnishi, K. ^{[16
]}

Saito, To. ^{[17
]}

Sullivan, D. J. ^{[18
]}

Sumi, T. ^{[15
]}

Suzuki, D. ^{[11
]}

Tristram, P. J. ^{[19
]}

Rattenbury, N. ^{[13
]}

Wakiyama, Y. ^{[9
]}

Yonehara, A. ^{[20
]}

Maoz, D. ^{[21
]}

Kaspi, S. ^{[21
]}

Friedmann, M. ^{[21
]}

机构：

[1] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[2] CALTECH, NASA Exoplanet Sci Inst, Pasadena, CA 91125 USA

[3] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano, SA, Italy

[4] IIASS, I-84019 Vietri Sul Mare, SA, Italy

[5] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA

[6] NASA Jet Prop Lab, Pasadena, CA 91109 USA

[7] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[8] Univ Warsaw Observ, PL-00478 Warsaw, Poland

[9] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan

[10] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA

[11] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[12] Massey Univ, North Shore Mail Ctr, Inst Informat & Math Sci, Auckland, New Zealand

[13] Univ Auckland, Dept Phys, Auckland 1, New Zealand

[14] Natl Astron Observ Japan, Okayama Astrophys Observ, Asakuchi, Okayama 7190232, Japan

[15] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

[16] Nagano Natl Coll Technol, Nagano 3818550, Japan

[17] Tokyo Metropolitan Coll Aeronaut, Tokyo 1168523, Japan

[18] Victoria Univ, Sch Chem & Phys Sci, Wellington, New Zealand

[19] Mt John Univ Observ, Lake Tekapo 8770, New Zealand

[20] Kyoto Sangyo Univ, Dept Phys, Fac Sci, Kyoto 6038555, Japan

[21] Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 814卷 / 02期

基金：

美国国家科学基金会;

关键词：

gravitational lensing: micro; planetary systems; PARALLAX SATELLITE MASS; SPITZER OBSERVATIONS; EXTRASOLAR PLANETS; MAGNIFICATION; COMPANIONS; STAR; LENS; SYSTEMS; EVENTS; FREQUENCY;

D O I：

10.1088/0004-637X/814/2/129

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

To move one step forward toward a Galactic distribution of planets, we present the first planet sensitivity analysis for microlensing events with simultaneous observations from space and the ground. We present this analysis for two such events, OGLE-2014-BLG-0939 and OGLE-2014-BLG-0124, which both show substantial planet sensitivity even though neither of them reached high magnification. This suggests that an ensemble of low to moderate magnification events can also yield significant planet sensitivity, and therefore probability, for detecting planets. The implications of our results to the ongoing and future space-based microlensing experiments to measure the Galactic distribution of planets are discussed.

引用

页数：10

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