CHARACTERIZING K2 PLANET DISCOVERIES: A SUPER-EARTH TRANSITING THE BRIGHT K DWARF HIP 116454

被引：85

作者：

Vanderburg, Andrew ^{[1
]}

Montet, Benjamin T. ^{[1
,2
]}

Johnson, John Asher ^{[1
]}

Buchhave, Lars A. ^{[1
]}

Zeng, Li ^{[1
]}

Pepe, Francesco ^{[3
]}

Cameron, Andrew Collier ^{[4
]}

Latham, David W. ^{[1
]}

Molinari, Emilio ^{[5
,6
]}

Udry, Stephane ^{[3
]}

Lovis, Christophe ^{[3
]}

Matthews, Jaymie M. ^{[7
]}

Cameron, Chris ^{[8
]}

Law, Nicholas ^{[9
]}

Bowler, Brendan P. ^{[2
]}

Angus, Ruth ^{[1
,10
]}

Baranec, Christoph ^{[11
]}

Bieryla, Allyson ^{[1
]}

Boschin, Walter ^{[5
]}

Charbonneau, David ^{[1
]}

Cosentino, Rosario ^{[5
]}

Dumusque, Xavier ^{[1
]}

Figueira, Pedro ^{[12
,13
]}

Guenther, David B. ^{[14
]}

Harutyunyan, Avet ^{[5
]}

Hellier, Coel ^{[15
]}

Kuschnig, Rainer ^{[16
]}

Lopez-Morales, Mercedes ^{[1
]}

Mayor, Michel ^{[3
]}

Micela, Giusi ^{[17
]}

Moffat, Anthony F. J. ^{[18
,19
]}

Pedani, Marco ^{[5
]}

Phillip, David F. ^{[1
]}

Piotto, Giampaolo ^{[5
,6
]}

Pollacco, Don ^{[20
]}

Queloz, Didier ^{[21
]}

Rice, Ken ^{[22
]}

Riddle, Reed ^{[2
]}

Rowe, Jason F. ^{[23
,24
]}

Rucinski, Slavek M. ^{[25
]}

Sasselov, Dimitar ^{[1
]}

Segransan, Damien ^{[3
]}

Sozzetti, Alessandro ^{[26
]}

Szentgyorgyi, Andrew ^{[1
]}

Watson, Chris ^{[27
]}

Weiss, Werner W. ^{[16
]}

机构：

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

[2] CALTECH, Pasadena, CA 91125 USA

[3] Univ Geneva, Astron Observ, CH-1290 Versoix, Switzerland

[4] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

[5] INAF Fdn Galileo Galilei, E-38712 Brena Baja, Spain

[6] INAF IASF Milano, I-20133 Milan, Italy

[7] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada

[8] Cape Breton Univ, Sydney, NS B1P 6L2, Canada

[9] Univ N Carolina, Chapel Hill, NC 27599 USA

[10] Univ Oxford, Oxford, England

[11] Univ Hawaii Manoa, Hilo, HI 96720 USA

[12] Univ Porto, Ctr Astrofis, P-4150762 Porto, Portugal

[13] Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, P-4150762 Porto, Portugal

[14] St Marys Univ, Halifax, NS B3H 3C3, Canada

[15] Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England

[16] Univ Vienna, Inst Astron, A-1180 Vienna, Austria

[17] INAF Osservatorio Astron Palermo, I-90124 Palermo, Italy

[18] Univ Montreal, Montreal, PQ H3C 3J7, Canada

[19] Obs Mont Megant, Notre Dame Des Bois, PQ J0B 2E0, Canada

[20] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[21] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[22] Univ Edinburgh, Inst Astron, Royal Observ, SUPA, Edinburgh EH9 3HJ, Midlothian, Scotland

[23] SETI Inst, Mountain View, CA 94043 USA

[24] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[25] Univ Toronto, Toronto, ON M5S 3H4, Canada

[26] INAF Osservatorio Astron Torino, I-10025 Pino Torinese, Italy

[27] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 800卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会; 美国安德鲁·梅隆基金会; 奥地利科学基金会; 英国科学技术设施理事会;

关键词：

planets and satellites: detection; techniques: photometric; PROPER-MOTION; SHORT-PERIOD; KEPLER; STARS; PHOTOMETRY; MISSION; III; COMPANION; WORLD; WARM;

D O I：

10.1088/0004-637X/800/1/59

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first planet discovery from the two-wheeled Kepler (K2) mission: HIP 116454 b. The host star HIP 116454 is a bright (V = 10.1, K = 8.0) K1 dwarf with high proper motion and a parallax-based distance of 55.2 +/- 5.4 pc. Based on high-resolution optical spectroscopy, we find that the host star is metal-poor with [Fe/H]= -0.16 +/- 0.08 and has a radius R-star = 0.716 +/- 0.024 R-circle dot and mass M-star = 0.775 +/- 0.027M(circle dot). The star was observed by the Kepler spacecraft during its Two-Wheeled Concept Engineering Test in 2014 February. During the 9 days of observations, K2 observed a single transit event. Using a new K2 photometric analysis technique, we are able to correct small telescope drifts and recover the observed transit at high confidence, corresponding to a planetary radius of R-p = 2.53 +/- 0.18 R-circle plus. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 +/- 1.33 M-circle plus planet in a 9.1 day orbit, consistent with the transit depth, duration, and ephemeris. Follow-up photometric measurements from the MOST satellite confirm the transit observed in the K2 photometry and provide a refined ephemeris, making HIP 116454 b amenable for future follow-up observations of this latest addition to the growing population of transiting super-Earths around nearby, bright stars.

引用

页数：14

共 45 条

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