Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454

Andrew Vanderburg; Benjamin T. Montet; John Asher Johnson; Lars A. Buchhave; Li Zeng; Francesco Pepe; Andrew Collier Cameron; David W. Latham; Emilio Molinari; Stéphane Udry; Christophe Lovis; Jaymie M. Matthews; Chris Cameron; Nicholas Law; Brendan P. Bowler; Ruth Angus; Christoph Baranec; Allyson Bieryla; Walter Boschin; David Charbonneau; Rosario Cosentino; Xavier Dumusque; Pedro Figueira; David B. Guenther; Avet Harutyunyan; Coel Hellier; Rainer Kuschnig; Mercedes Lopez-Morales; Michel Mayor; Giusi Micela; Anthony F. J. Moffat; Marco Pedani; David F. Phillips; Giampaolo Piotto; Don Pollacco; Didier Queloz; Ken Rice; Reed Riddle; Jason F. Rowe; Slavek M. Rucinski; Dimitar Sasselov; Damien Ségransan; Alessandro Sozzetti; Andrew Szentgyorgyi; Chris Watson; Werner W. Weiss

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

Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454

Andrew Vanderburg, Benjamin T. Montet, John Asher Johnson, Lars A. Buchhave, Li Zeng, Francesco Pepe, Andrew Collier Cameron, David W. Latham, Emilio Molinari, Stéphane Udry, Christophe Lovis, Jaymie M. Matthews, Chris Cameron, Nicholas Law, Brendan P. Bowler, Ruth Angus, Christoph Baranec, Allyson Bieryla, Walter Boschin, David CharbonneauRosario Cosentino, Xavier Dumusque, Pedro Figueira, David B. Guenther, Avet Harutyunyan, Coel Hellier, Rainer Kuschnig, Mercedes Lopez-Morales, Michel Mayor, Giusi Micela, Anthony F. J. Moffat, Marco Pedani, David F. Phillips, Giampaolo Piotto, Don Pollacco, Didier Queloz, Ken Rice, Reed Riddle, Jason F. Rowe, Slavek M. Rucinski, Dimitar Sasselov, Damien Ségransan, Alessandro Sozzetti, Andrew Szentgyorgyi, Chris Watson, Werner W. Weiss

School of Physics and Astronomy

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

Abstract

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 sstarf = 0.716 ± 0.024 R ☉ and mass M sstarf = 0.775 ± 0.027 M ☉. 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 Rp = 2.53 ± 0.18 R ⊕. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 ± 1.33 M ⊕ 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.

Original language	English
Pages (from-to)	59
Journal	Astrophysical Journal
Volume	800
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/800/1/59
Publication status	Published - 1 Feb 2015

Keywords / Materials (for Non-textual outputs)

planets and satellites: detection
techniques: photometric

Access to Document

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

Vandenberg_etal_2015Final published version, 1.5 MBLicence: Creative Commons: Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)

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Vanderburg, A., Montet, B. T., Johnson, J. A., Buchhave, L. A., Zeng, L., Pepe, F., Collier Cameron, A., Latham, D. W., Molinari, E., Udry, S., Lovis, C., Matthews, J. M., Cameron, C., Law, N., Bowler, B. P., Angus, R., Baranec, C., Bieryla, A., Boschin, W., ... Weiss, W. W. (2015). Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454. Astrophysical Journal, 800(1), 59. https://doi.org/10.1088/0004-637X/800/1/59

@article{f199e0afd1644c4987911ddb08525663,

title = "Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454",

abstract = "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 sstarf = 0.716 ± 0.024 R ☉ and mass M sstarf = 0.775 ± 0.027 M ☉. 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 Rp = 2.53 ± 0.18 R ⊕. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 ± 1.33 M ⊕ 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.",

keywords = "planets and satellites: detection, techniques: photometric",

author = "Andrew Vanderburg and Montet, \{Benjamin T.\} and Johnson, \{John Asher\} and Buchhave, \{Lars A.\} and Li Zeng and Francesco Pepe and \{Collier Cameron\}, Andrew and Latham, \{David W.\} and Emilio Molinari and St{\'e}phane Udry and Christophe Lovis and Matthews, \{Jaymie M.\} and Chris Cameron and Nicholas Law and Bowler, \{Brendan P.\} and Ruth Angus and Christoph Baranec and Allyson Bieryla and Walter Boschin and David Charbonneau and Rosario Cosentino and Xavier Dumusque and Pedro Figueira and Guenther, \{David B.\} and Avet Harutyunyan and Coel Hellier and Rainer Kuschnig and Mercedes Lopez-Morales and Michel Mayor and Giusi Micela and Moffat, \{Anthony F. J.\} and Marco Pedani and Phillips, \{David F.\} and Giampaolo Piotto and Don Pollacco and Didier Queloz and Ken Rice and Reed Riddle and Rowe, \{Jason F.\} and Rucinski, \{Slavek M.\} and Dimitar Sasselov and Damien S{\'e}gransan and Alessandro Sozzetti and Andrew Szentgyorgyi and Chris Watson and Weiss, \{Werner W.\}",

year = "2015",

month = feb,

day = "1",

doi = "10.1088/0004-637X/800/1/59",

language = "English",

volume = "800",

pages = "59",

journal = "Astrophysical Journal",

issn = "1538-4357",

publisher = "American Astronomical Society",

number = "1",

}

Vanderburg, A, Montet, BT, Johnson, JA, Buchhave, LA, Zeng, L, Pepe, F, Collier Cameron, A, Latham, DW, Molinari, E, Udry, S, Lovis, C, Matthews, JM, Cameron, C, Law, N, Bowler, BP, Angus, R, Baranec, C, Bieryla, A, Boschin, W, Charbonneau, D, Cosentino, R, Dumusque, X, Figueira, P, Guenther, DB, Harutyunyan, A, Hellier, C, Kuschnig, R, Lopez-Morales, M, Mayor, M, Micela, G, Moffat, AFJ, Pedani, M, Phillips, DF, Piotto, G, Pollacco, D, Queloz, D, Rice, K, Riddle, R, Rowe, JF, Rucinski, SM, Sasselov, D, Ségransan, D, Sozzetti, A, Szentgyorgyi, A, Watson, C & Weiss, WW 2015, 'Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454', Astrophysical Journal, vol. 800, no. 1, pp. 59. https://doi.org/10.1088/0004-637X/800/1/59

TY - JOUR

T1 - Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454

AU - Vanderburg, Andrew

AU - Montet, Benjamin T.

AU - Johnson, John Asher

AU - Buchhave, Lars A.

AU - Zeng, Li

AU - Pepe, Francesco

AU - Collier Cameron, Andrew

AU - Latham, David W.

AU - Molinari, Emilio

AU - Udry, Stéphane

AU - Lovis, Christophe

AU - Matthews, Jaymie M.

AU - Cameron, Chris

AU - Law, Nicholas

AU - Bowler, Brendan P.

AU - Angus, Ruth

AU - Baranec, Christoph

AU - Bieryla, Allyson

AU - Boschin, Walter

AU - Charbonneau, David

AU - Cosentino, Rosario

AU - Dumusque, Xavier

AU - Figueira, Pedro

AU - Guenther, David B.

AU - Harutyunyan, Avet

AU - Hellier, Coel

AU - Kuschnig, Rainer

AU - Lopez-Morales, Mercedes

AU - Mayor, Michel

AU - Micela, Giusi

AU - Moffat, Anthony F. J.

AU - Pedani, Marco

AU - Phillips, David F.

AU - Piotto, Giampaolo

AU - Pollacco, Don

AU - Queloz, Didier

AU - Rice, Ken

AU - Riddle, Reed

AU - Rowe, Jason F.

AU - Rucinski, Slavek M.

AU - Sasselov, Dimitar

AU - Ségransan, Damien

AU - Sozzetti, Alessandro

AU - Szentgyorgyi, Andrew

AU - Watson, Chris

AU - Weiss, Werner W.

PY - 2015/2/1

Y1 - 2015/2/1

N2 - 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 sstarf = 0.716 ± 0.024 R ☉ and mass M sstarf = 0.775 ± 0.027 M ☉. 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 Rp = 2.53 ± 0.18 R ⊕. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 ± 1.33 M ⊕ 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.

AB - 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 sstarf = 0.716 ± 0.024 R ☉ and mass M sstarf = 0.775 ± 0.027 M ☉. 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 Rp = 2.53 ± 0.18 R ⊕. Radial velocity observations with the HARPS-N spectrograph reveal a 11.82 ± 1.33 M ⊕ 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.

KW - planets and satellites: detection

KW - techniques: photometric

U2 - 10.1088/0004-637X/800/1/59

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

M3 - Article

SN - 1538-4357

VL - 800

SP - 59

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Characterizing K2 Planet Discoveries: A Super-Earth Transiting the Bright K Dwarf HIP 116454

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