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

Robert A. Wittenmyer; Jake T. Clark; Sanjib Sharma; Dennis Stello; Jonathan Horner; Stephen R. Kane; Catherine P. Stevens; Duncan J. Wright; Lorenzo Spina; Klemen Čotar; Martin Asplund; Joss Bland-Hawthorn; Sven Buder; Andrew R. Casey; Gayandhi M. De Silva; Valentina D'Orazi; Ken Freeman; Janez Kos; Geraint Lewis; Jane Lin; Karin Lind; Sarah L. Martell; Jeffrey D. Simpson; Daniel B. Zucker; Tomaz Zwitter

doi:10.1093/mnras/staa1528

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

Robert A. Wittenmyer^*, Jake T. Clark, Sanjib Sharma, Dennis Stello, Jonathan Horner, Stephen R. Kane, Catherine P. Stevens, Duncan J. Wright, Lorenzo Spina, Klemen Čotar, Martin Asplund, Joss Bland-Hawthorn, Sven Buder, Andrew R. Casey, Gayandhi M. De Silva, Valentina D'Orazi, Ken Freeman, Janez Kos, Geraint Lewis, Jane LinKarin Lind, Sarah L. Martell, Jeffrey D. Simpson, Daniel B. Zucker, Tomaz Zwitter

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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∼ 28000 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.

Original language	English
Pages (from-to)	851-863
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	496
Issue number	1
DOIs	https://doi.org/10.1093/mnras/staa1528
Publication status	Published - 11 Jun 2020

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Wittenmyer, R. A., Clark, J. T., Sharma, S., Stello, D., Horner, J., Kane, S. R., Stevens, C. P., Wright, D. J., Spina, L., Čotar, K., Asplund, M., Bland-Hawthorn, J., Buder, S., Casey, A. R., De Silva, G. M., D'Orazi, V., Freeman, K., Kos, J., Lewis, G., ... Zwitter, T. (2020). K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13. Monthly Notices of the Royal Astronomical Society, 496(1), 851-863. https://doi.org/10.1093/mnras/staa1528

@article{e0c7b472898e4a239d16c0757900c78d,

title = "K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13",

abstract = "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∼ 28000 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 2RJup. 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.",

keywords = "planets and satellites: fundamental parameters, stars: fundamental parameters, techniques: spectroscopic",

author = "Wittenmyer, {Robert A.} and Clark, {Jake T.} and Sanjib Sharma and Dennis Stello and Jonathan Horner and Kane, {Stephen R.} and Stevens, {Catherine P.} and Wright, {Duncan J.} and Lorenzo Spina and Klemen {\v C}otar and Martin Asplund and Joss Bland-Hawthorn and Sven Buder and Casey, {Andrew R.} and {De Silva}, {Gayandhi M.} and Valentina D'Orazi and Ken Freeman and Janez Kos and Geraint Lewis and Jane Lin and Karin Lind and Martell, {Sarah L.} and Simpson, {Jeffrey D.} and Zucker, {Daniel B.} and Tomaz Zwitter",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2020",

month = jun,

day = "11",

doi = "10.1093/mnras/staa1528",

language = "English",

volume = "496",

pages = "851--863",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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Wittenmyer, RA, Clark, JT, Sharma, S, Stello, D, Horner, J, Kane, SR, Stevens, CP, Wright, DJ, Spina, L, Čotar, K, Asplund, M, Bland-Hawthorn, J, Buder, S, Casey, AR, De Silva, GM, D'Orazi, V, Freeman, K, Kos, J, Lewis, G, Lin, J, Lind, K, Martell, SL, Simpson, JD, Zucker, DB & Zwitter, T 2020, 'K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13', Monthly Notices of the Royal Astronomical Society, vol. 496, no. 1, pp. 851-863. https://doi.org/10.1093/mnras/staa1528

TY - JOUR

T1 - K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13

AU - Wittenmyer, Robert A.

AU - Clark, Jake T.

AU - Sharma, Sanjib

AU - Stello, Dennis

AU - Horner, Jonathan

AU - Kane, Stephen R.

AU - Stevens, Catherine P.

AU - Wright, Duncan J.

AU - Spina, Lorenzo

AU - Čotar, Klemen

AU - Asplund, Martin

AU - Bland-Hawthorn, Joss

AU - Buder, Sven

AU - Casey, Andrew R.

AU - De Silva, Gayandhi M.

AU - D'Orazi, Valentina

AU - Freeman, Ken

AU - Kos, Janez

AU - Lewis, Geraint

AU - Lin, Jane

AU - Lind, Karin

AU - Martell, Sarah L.

AU - Simpson, Jeffrey D.

AU - Zucker, Daniel B.

AU - Zwitter, Tomaz

PY - 2020/6/11

Y1 - 2020/6/11

N2 - 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∼ 28000 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 2RJup. 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.

AB - 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∼ 28000 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 2RJup. 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.

KW - planets and satellites: fundamental parameters

KW - stars: fundamental parameters

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=85088582948&partnerID=8YFLogxK

U2 - 10.1093/mnras/staa1528

DO - 10.1093/mnras/staa1528

M3 - Article

SN - 0035-8711

VL - 496

SP - 851

EP - 863

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

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

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