Kepler-21b: a 1.6 REarth planet transiting the bright oscillating F subgiant star HD 179070

Steve B. Howell; Jason F. Rowe; Stephen T. Bryson; Samuel N. Quinn; Geoffrey W. Marcy; Howard Isaacson; David R. Ciardi; William J. Chaplin; Travis S. Metcalfe; Mario J. P. F. G. Monteiro; Thierry Appourchaux; Sarbani Basu; Orlagh L. Creevey; Ronald L. Gilliland; Pierre-Olivier Quirion; Denis Stello; Hans Kjeldsen; Jörgen Christensen-Dalsgaard; Yvonne Elsworth; Rafael A. García; Günter Houdek; Christoffer Karoff; Joanna Molenda-Zakowicz; Michael J. Thompson; Graham A. Verner; Guillermo Torres; Francois Fressin; Justin R. Crepp; Elisabeth Adams; Andrea Dupree; Dimitar D. Sasselov; Courtney D. Dressing; William J. Borucki; David G. Koch; Jack J. Lissauer; David W. Latham; Lars A. Buchhave; Thomas N. Gautier; Mark Everett; Elliott Horch; Natalie M. Batalha; Edward W. Dunham; Paula Szkody; David R. Silva; Ken Mighell; Jay Holberg; Jerôme Ballot; Timothy R. Bedding; Hans Bruntt; Tiago L. Campante; Rasmus Handberg; Saskia Hekker; Daniel Huber; Savita Mathur; Benoit Mosser; Clara Régulo; Timothy R. White; Jessie L. Christiansen; Christopher K. Middour; Michael R. Haas; Jennifer R. Hall; Jon M. Jenkins; Sean McCaulif; Michael N. Fanelli; Craig Kulesa; Don McCarthy; Christopher E. Henze

doi:10.1088/0004-637X/746/2/123

Kepler-21b: a 1.6 R_Earth planet transiting the bright oscillating F subgiant star HD 179070

Steve B. Howell, Jason F. Rowe, Stephen T. Bryson, Samuel N. Quinn, Geoffrey W. Marcy, Howard Isaacson, David R. Ciardi, William J. Chaplin, Travis S. Metcalfe, Mario J. P. F. G. Monteiro, Thierry Appourchaux, Sarbani Basu, Orlagh L. Creevey, Ronald L. Gilliland, Pierre-Olivier Quirion, Denis Stello, Hans Kjeldsen, Jörgen Christensen-Dalsgaard, Yvonne Elsworth, Rafael A. GarcíaGünter Houdek, Christoffer Karoff, Joanna Molenda-Zakowicz, Michael J. Thompson, Graham A. Verner, Guillermo Torres, Francois Fressin, Justin R. Crepp, Elisabeth Adams, Andrea Dupree, Dimitar D. Sasselov, Courtney D. Dressing, William J. Borucki, David G. Koch, Jack J. Lissauer, David W. Latham, Lars A. Buchhave, Thomas N. Gautier, Mark Everett, Elliott Horch, Natalie M. Batalha, Edward W. Dunham, Paula Szkody, David R. Silva, Ken Mighell, Jay Holberg, Jerôme Ballot, Timothy R. Bedding, Hans Bruntt, Tiago L. Campante, Rasmus Handberg, Saskia Hekker, Daniel Huber, Savita Mathur, Benoit Mosser, Clara Régulo, Timothy R. White, Jessie L. Christiansen, Christopher K. Middour, Michael R. Haas, Jennifer R. Hall, Jon M. Jenkins, Sean McCaulif, Michael N. Fanelli, Craig Kulesa, Don McCarthy, Christopher E. Henze

Astrophysics and Planetary Science

92 Citations (Scopus)

Abstract

We present Kepler observations of the bright (V = 8.3), oscillating star HD179070. The observations show transit-like events which reveal that the star is orbited every 2.8days by a small, 1.6 R _Earth object. Seismic studies of HD179070 using short cadence Kepler observations show that HD179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD179070, 1.34 ± 0.06 M _⊙ and 1.86 ± 0.04 R _⊙, respectively, as well as yielding an age of 2.84 ± 0.34Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3σ) that the transit event is caused by a 1.64 0.04 R _Earth exoplanet in a 2.785755 ± 0.000032day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ∼10 M _Earth (2σ). HD179070 is the brightest exoplanet host star yet discovered by Kepler.

Original language	English
Article number	123
Journal	Astrophysical Journal
Volume	746
Issue number	2
Number of pages	18
ISSN	0004-637X
DOIs	https://doi.org/10.1088/0004-637X/746/2/123
Publication status	Published - 20 Feb 2012

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Howell, S. B., Rowe, J. F., Bryson, S. T., Quinn, S. N., Marcy, G. W., Isaacson, H., Ciardi, D. R., Chaplin, W. J., Metcalfe, T. S., Monteiro, M. J. P. F. G., Appourchaux, T., Basu, S., Creevey, O. L., Gilliland, R. L., Quirion, P-O., Stello, D., Kjeldsen, H., Christensen-Dalsgaard, J., Elsworth, Y., ... Henze, C. E. (2012). Kepler-21b: a 1.6 R_Earth planet transiting the bright oscillating F subgiant star HD 179070. Astrophysical Journal, 746(2), [123]. https://doi.org/10.1088/0004-637X/746/2/123

Howell, SB, Rowe, JF, Bryson, ST, Quinn, SN, Marcy, GW, Isaacson, H, Ciardi, DR, Chaplin, WJ, Metcalfe, TS, Monteiro, MJPFG, Appourchaux, T, Basu, S, Creevey, OL, Gilliland, RL, Quirion, P-O, Stello, D, Kjeldsen, H, Christensen-Dalsgaard, J, Elsworth, Y, García, RA, Houdek, G, Karoff, C, Molenda-Zakowicz, J, Thompson, MJ, Verner, GA, Torres, G, Fressin, F, Crepp, JR, Adams, E, Dupree, A, Sasselov, DD, Dressing, CD, Borucki, WJ, Koch, DG, Lissauer, JJ, Latham, DW, Buchhave, LA, Gautier, TN, Everett, M, Horch, E, Batalha, NM, Dunham, EW, Szkody, P, Silva, DR, Mighell, K, Holberg, J, Ballot, J, Bedding, TR, Bruntt, H, Campante, TL, Handberg, R, Hekker, S, Huber, D, Mathur, S, Mosser, B, Régulo, C, White, TR, Christiansen, JL, Middour, CK, Haas, MR, Hall, JR, Jenkins, JM, McCaulif, S, Fanelli, MN, Kulesa, C, McCarthy, D & Henze, CE 2012, 'Kepler-21b: a 1.6 R_Earth planet transiting the bright oscillating F subgiant star HD 179070', Astrophysical Journal, vol. 746, no. 2, 123. https://doi.org/10.1088/0004-637X/746/2/123

@article{4f4889ea03e14743a24b795270a00d13,

title = "Kepler-21b: a 1.6 REarth planet transiting the bright oscillating F subgiant star HD 179070",

abstract = "We present Kepler observations of the bright (V = 8.3), oscillating star HD179070. The observations show transit-like events which reveal that the star is orbited every 2.8days by a small, 1.6 R Earth object. Seismic studies of HD179070 using short cadence Kepler observations show that HD179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD179070, 1.34 ± 0.06 M ⊙ and 1.86 ± 0.04 R ⊙, respectively, as well as yielding an age of 2.84 ± 0.34Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3σ) that the transit event is caused by a 1.64 0.04 R Earth exoplanet in a 2.785755 ± 0.000032day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ∼10 M Earth (2σ). HD179070 is the brightest exoplanet host star yet discovered by Kepler.",

author = "Howell, {Steve B.} and Rowe, {Jason F.} and Bryson, {Stephen T.} and Quinn, {Samuel N.} and Marcy, {Geoffrey W.} and Howard Isaacson and Ciardi, {David R.} and Chaplin, {William J.} and Metcalfe, {Travis S.} and Monteiro, {Mario J. P. F. G.} and Thierry Appourchaux and Sarbani Basu and Creevey, {Orlagh L.} and Gilliland, {Ronald L.} and Pierre-Olivier Quirion and Denis Stello and Hans Kjeldsen and J{\"o}rgen Christensen-Dalsgaard and Yvonne Elsworth and Garc{\'i}a, {Rafael A.} and G{\"u}nter Houdek and Christoffer Karoff and Joanna Molenda-Zakowicz and Thompson, {Michael J.} and Verner, {Graham A.} and Guillermo Torres and Francois Fressin and Crepp, {Justin R.} and Elisabeth Adams and Andrea Dupree and Sasselov, {Dimitar D.} and Dressing, {Courtney D.} and Borucki, {William J.} and Koch, {David G.} and Lissauer, {Jack J.} and Latham, {David W.} and Buchhave, {Lars A.} and Gautier, {Thomas N.} and Mark Everett and Elliott Horch and Batalha, {Natalie M.} and Dunham, {Edward W.} and Paula Szkody and Silva, {David R.} and Ken Mighell and Jay Holberg and Jer{\^o}me Ballot and Bedding, {Timothy R.} and Hans Bruntt and Campante, {Tiago L.} and Rasmus Handberg and Saskia Hekker and Daniel Huber and Savita Mathur and Benoit Mosser and Clara R{\'e}gulo and White, {Timothy R.} and Christiansen, {Jessie L.} and Middour, {Christopher K.} and Haas, {Michael R.} and Hall, {Jennifer R.} and Jenkins, {Jon M.} and Sean McCaulif and Fanelli, {Michael N.} and Craig Kulesa and Don McCarthy and Henze, {Christopher E.}",

year = "2012",

month = feb,

day = "20",

doi = "10.1088/0004-637X/746/2/123",

language = "English",

volume = "746",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing, Inc",

number = "2",

}

TY - JOUR

T1 - Kepler-21b

T2 - a 1.6 REarth planet transiting the bright oscillating F subgiant star HD 179070

AU - Howell, Steve B.

AU - Rowe, Jason F.

AU - Bryson, Stephen T.

AU - Quinn, Samuel N.

AU - Marcy, Geoffrey W.

AU - Isaacson, Howard

AU - Ciardi, David R.

AU - Chaplin, William J.

AU - Metcalfe, Travis S.

AU - Monteiro, Mario J. P. F. G.

AU - Appourchaux, Thierry

AU - Basu, Sarbani

AU - Creevey, Orlagh L.

AU - Gilliland, Ronald L.

AU - Quirion, Pierre-Olivier

AU - Stello, Denis

AU - Kjeldsen, Hans

AU - Christensen-Dalsgaard, Jörgen

AU - Elsworth, Yvonne

AU - García, Rafael A.

AU - Houdek, Günter

AU - Karoff, Christoffer

AU - Molenda-Zakowicz, Joanna

AU - Thompson, Michael J.

AU - Verner, Graham A.

AU - Torres, Guillermo

AU - Fressin, Francois

AU - Crepp, Justin R.

AU - Adams, Elisabeth

AU - Dupree, Andrea

AU - Sasselov, Dimitar D.

AU - Dressing, Courtney D.

AU - Borucki, William J.

AU - Koch, David G.

AU - Lissauer, Jack J.

AU - Latham, David W.

AU - Buchhave, Lars A.

AU - Gautier, Thomas N.

AU - Everett, Mark

AU - Horch, Elliott

AU - Batalha, Natalie M.

AU - Dunham, Edward W.

AU - Szkody, Paula

AU - Silva, David R.

AU - Mighell, Ken

AU - Holberg, Jay

AU - Ballot, Jerôme

AU - Bedding, Timothy R.

AU - Bruntt, Hans

AU - Campante, Tiago L.

AU - Handberg, Rasmus

AU - Hekker, Saskia

AU - Huber, Daniel

AU - Mathur, Savita

AU - Mosser, Benoit

AU - Régulo, Clara

AU - White, Timothy R.

AU - Christiansen, Jessie L.

AU - Middour, Christopher K.

AU - Haas, Michael R.

AU - Hall, Jennifer R.

AU - Jenkins, Jon M.

AU - McCaulif, Sean

AU - Fanelli, Michael N.

AU - Kulesa, Craig

AU - McCarthy, Don

AU - Henze, Christopher E.

PY - 2012/2/20

Y1 - 2012/2/20

N2 - We present Kepler observations of the bright (V = 8.3), oscillating star HD179070. The observations show transit-like events which reveal that the star is orbited every 2.8days by a small, 1.6 R Earth object. Seismic studies of HD179070 using short cadence Kepler observations show that HD179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD179070, 1.34 ± 0.06 M ⊙ and 1.86 ± 0.04 R ⊙, respectively, as well as yielding an age of 2.84 ± 0.34Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3σ) that the transit event is caused by a 1.64 0.04 R Earth exoplanet in a 2.785755 ± 0.000032day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ∼10 M Earth (2σ). HD179070 is the brightest exoplanet host star yet discovered by Kepler.

AB - We present Kepler observations of the bright (V = 8.3), oscillating star HD179070. The observations show transit-like events which reveal that the star is orbited every 2.8days by a small, 1.6 R Earth object. Seismic studies of HD179070 using short cadence Kepler observations show that HD179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD179070, 1.34 ± 0.06 M ⊙ and 1.86 ± 0.04 R ⊙, respectively, as well as yielding an age of 2.84 ± 0.34Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3σ) that the transit event is caused by a 1.64 0.04 R Earth exoplanet in a 2.785755 ± 0.000032day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ∼10 M Earth (2σ). HD179070 is the brightest exoplanet host star yet discovered by Kepler.

U2 - 10.1088/0004-637X/746/2/123

DO - 10.1088/0004-637X/746/2/123

M3 - Journal article

SN - 0004-637X

VL - 746

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 123

ER -

Kepler-21b: a 1.6 REarth planet transiting the bright oscillating F subgiant star HD 179070

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Kepler-21b: a 1.6 R_Earth planet transiting the bright oscillating F subgiant star HD 179070