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; Stephane 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 Segransan; 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, Stephane 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 Segransan, Alessandro Sozzetti, Andrew Szentgyorgyi, Chris Watson, Werner W. Weiss

^*Corresponding author for this work

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

86 Citations (Scopus)

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-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.

Original language	English
Article number	59
Number of pages	14
Journal	Astrophysical Journal
Volume	800
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/800/1/59
Publication status	Published - 10 Feb 2015

Keywords

planets and satellites: detection
techniques: photometric
LASER ADAPTIVE OPTICS
NEPTUNE-MASS PLANET
SKY SURVEY
PROPER-MOTION
SHORT-PERIOD
HD 97658B
EXOPLANET
KEPLER
STARS
MISSION

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

Christopher Watson
- c.a.watsonqub.acuk
- School of Mathematics and Physics - Professor
- Astrophysics Research Centre (ARC)
Person: Academic

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Vanderburg, A., Montet, B. T., Johnson, J. A., Buchhave, L. A., Zeng, L., Pepe, F., Cameron, A. C., 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), Article 59. https://doi.org/10.1088/0004-637X/800/1/59

@article{8fbf005aee4242caacde1ebad4c11909,

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-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.",

keywords = "planets and satellites: detection, techniques: photometric, LASER ADAPTIVE OPTICS, NEPTUNE-MASS PLANET, SKY SURVEY, PROPER-MOTION, SHORT-PERIOD, HD 97658B, EXOPLANET, KEPLER, STARS, MISSION",

author = "Andrew Vanderburg and Montet, {Benjamin T.} and Johnson, {John Asher} and Buchhave, {Lars A.} and Li Zeng and Francesco Pepe and Cameron, {Andrew Collier} and Latham, {David W.} and Emilio Molinari and Stephane 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 Segransan and Alessandro Sozzetti and Andrew Szentgyorgyi and Chris Watson and Weiss, {Werner W.}",

year = "2015",

month = feb,

day = "10",

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

language = "English",

volume = "800",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd",

number = "1",

}

Vanderburg, A, Montet, BT, Johnson, JA, Buchhave, LA, Zeng, L, Pepe, F, Cameron, AC, 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, Segransan, 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, 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 - Cameron, Andrew Collier

AU - Latham, David W.

AU - Molinari, Emilio

AU - Udry, Stephane

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 - Segransan, Damien

AU - Sozzetti, Alessandro

AU - Szentgyorgyi, Andrew

AU - Watson, Chris

AU - Weiss, Werner W.

PY - 2015/2/10

Y1 - 2015/2/10

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-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.

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-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.

KW - planets and satellites: detection

KW - techniques: photometric

KW - LASER ADAPTIVE OPTICS

KW - NEPTUNE-MASS PLANET

KW - SKY SURVEY

KW - PROPER-MOTION

KW - SHORT-PERIOD

KW - HD 97658B

KW - EXOPLANET

KW - KEPLER

KW - STARS

KW - MISSION

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

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

M3 - Article

SN - 0004-637X

VL - 800

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 59

ER -

Characterizing K2 Planet Discoveries: A super-Earth transiting the bright K-dwarf HIP 116454

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