K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13

被引：7

作者：

Wittenmyer, Robert A. ^{[1
]}

Clark, Jake T. ^{[1
]}

Sharma, Sanjib ^{[2
]}

Stello, Dennis ^{[3
]}

Horner, Jonathan ^{[1
]}

Kane, Stephen R. ^{[4
]}

Stevens, Catherine P. ^{[5
]}

Wright, Duncan J. ^{[1
]}

Spina, Lorenzo ^{[6
]}

Asplund, Martin ^{[8
]}

Bland-Hawthorn, Joss ^{[2
]}

Buder, Sven ^{[8
,9
,10
]}

Casey, Andrew R. ^{[6
]}

De Silva, Gayandhi M. ^{[2
]}

D'Orazi, Valentina ^{[11
]}

Freeman, Ken ^{[8
]}

Kos, Janez ^{[2
]}

Lewis, Geraint ^{[2
]}

Lin, Jane ^{[2
]}

Lind, Karin ^{[10
,12
]}

Martell, Sarah L. ^{[3
,9
]}

Simpson, Jeffrey D. ^{[3
]}

Zucker, Daniel B. ^{[13
,14
]}

Zwitter, Tomaz ^{[7
]}

Cotar, Klemen ^{[7
]}

机构：

[1] Univ Southern Queensland, Ctr Astrophys, USQ Toowoomba, Toowoomba, Qld 4350, Australia

[2] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[3] Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia

[4] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA 92521 USA

[5] Westminster Coll, Dept Phys, New Wilmington, PA 16172 USA

[6] Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Monash, Vic 3800, Australia

[7] Univ Ljubljana, Fac Math & Phys, Jadranska 19, Ljubljana 1000, Slovenia

[8] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

[9] ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Canberra, ACT 2611, Australia

[10] Max Planck Inst Astron MPIA, Koenigstuhl 17, D-69117 Heidelberg, Germany

[11] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[12] Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden

[13] Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia

[14] Macquarie Univ, Res Ctr Astron Astrophys & Astrophoton, Sydney, NSW 2109, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 496卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

techniques: spectroscopic; planets and satellites: fundamental parameters; stars: fundamental parameters; GALAH SURVEY; SUPER-EARTH; STARS; SPECTROSCOPY; EXOPLANETS; COMPANION; SEARCH; VALLEY; IMAGES;

D O I：

10.1093/mnras/staa1528

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Accurate and precise radius estimates of transiting exoplanets are critical for understanding their compositions and formation mechanisms. To know the planet, we must know the host star in as much detail as possible. We present complete results for planet-candidate hosts from the K2-HERMES survey, which uses the HERMES multi-object spectrograph on the Anglo-Australian Telescope to obtain R similar to 28 000 spectra for more than 30 000 K2 stars. We present complete host-star parameters and planet-candidate radii for 224 K2 candidate planets from C1-C13. Our results cast severe doubt on 30 K2 candidates, as we derive unphysically large radii, larger than 2R(Jup). This work highlights the importance of obtaining accurate, precise, and self-consistent stellar parameters for ongoing large planet search programs - something that will only become more important in the coming years, as TESS begins to deliver its own harvest of exoplanets.

引用

页码：851 / 863

页数：13

共 50 条

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