WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus

B. Smalley; D.~R. Anderson; A. Collier-Cameron; A.~P. Doyle; A. Fumel; M. Gillon; C. Hellier; E. Jehin; M. Lendl; P.~F.~L. Maxted; F. Pepe; D. Pollacco; D. Queloz; D. Ségransan; A.~M.~S. Smith; J. Southworth; A.~H.~M.~J. Triaud; S. Udry; R.~G. West

doi:10.1051/0004-6361/201219731

WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus

B. Smalley, D.~R. Anderson, A. Collier-Cameron, A.~P. Doyle, A. Fumel, M. Gillon, C. Hellier, E. Jehin, M. Lendl, P.~F.~L. Maxted, F. Pepe, D. Pollacco, D. Queloz, D. Ségransan, A.~M.~S. Smith, J. Southworth, A.~H.~M.~J. Triaud, S. Udry, R.~G. West

Physics and Astronomy

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Abstract

We report the discovery of WASP-78b and WASP-79b, two highly-bloated Jupiter-mass exoplanets orbiting F-type host stars. WASP-78b orbits its V = 12.0 host star (TYC 5889-271-1) every 2.175 days and WASP-79b orbits its V = 10.1 host star (CD-30 1812) every 3.662 days. Planetary parameters have been determined using a simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements. For WASP-78b a planetary mass of 0.89 plusmn 0.08 M$_Jup$ and a radius of 1.70 plusmn 0.11 R$_Jup$ is found. The planetary equilibrium temperature of T$_P$ = 2350 plusmn 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. WASP-79b its found to have a planetary mass of 0.90 plusmn 0.08 M$_Jup$, but with a somewhat uncertain radius due to lack of sufficient TRAPPIST photometry. The planetary radius is at least 1.70 plusmn 0.11 R$_Jup$, but could be as large as 2.09 plusmn 0.14 R$_Jup$, which would make WASP-79b the largest known exoplanet. Photometric data is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/547/A61Table 1 is available in electronic form at http://www.aanda.org

Original language	English
Pages (from-to)	A61
Journal	Astronomy and Astrophysics
Volume	547
DOIs	https://doi.org/10.1051/0004-6361/201219731
Publication status	Published - 1 Nov 2012

Keywords

planets and satellites: general, stars: individual: WASP-78, stars: individual: WASP-79, techniques: spectroscopic, techniques: radial velocities, techniques: photometric

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10.1051/0004-6361/201219731

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Smalley, B., Anderson, D. R., Collier-Cameron, A., Doyle, A. P., Fumel, A., Gillon, M., Hellier, C., Jehin, E., Lendl, M., Maxted, P. F. L., Pepe, F., Pollacco, D., Queloz, D., Ségransan, D., Smith, A. M. S., Southworth, J., Triaud, A. H. M. J., Udry, S., & West, R. G. (2012). WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus. Astronomy and Astrophysics, 547, A61. https://doi.org/10.1051/0004-6361/201219731

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title = "WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus",

abstract = "We report the discovery of WASP-78b and WASP-79b, two highly-bloated Jupiter-mass exoplanets orbiting F-type host stars. WASP-78b orbits its V = 12.0 host star (TYC 5889-271-1) every 2.175 days and WASP-79b orbits its V = 10.1 host star (CD-30 1812) every 3.662 days. Planetary parameters have been determined using a simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements. For WASP-78b a planetary mass of 0.89 plusmn 0.08 M$_Jup$ and a radius of 1.70 plusmn 0.11 R$_Jup$ is found. The planetary equilibrium temperature of T$_P$ = 2350 plusmn 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. WASP-79b its found to have a planetary mass of 0.90 plusmn 0.08 M$_Jup$, but with a somewhat uncertain radius due to lack of sufficient TRAPPIST photometry. The planetary radius is at least 1.70 plusmn 0.11 R$_Jup$, but could be as large as 2.09 plusmn 0.14 R$_Jup$, which would make WASP-79b the largest known exoplanet. Photometric data is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/547/A61Table 1 is available in electronic form at http://www.aanda.org ",

keywords = "planets and satellites: general, stars: individual: WASP-78, stars: individual: WASP-79, techniques: spectroscopic, techniques: radial velocities, techniques: photometric",

author = "B. Smalley and D.~R. Anderson and A. Collier-Cameron and A.~P. Doyle and A. Fumel and M. Gillon and C. Hellier and E. Jehin and M. Lendl and P.~F.~L. Maxted and F. Pepe and D. Pollacco and D. Queloz and D. S{\'e}gransan and A.~M.~S. Smith and J. Southworth and A.~H.~M.~J. Triaud and S. Udry and R.~G. West",

year = "2012",

month = nov,

day = "1",

doi = "10.1051/0004-6361/201219731",

language = "English",

volume = "547",

pages = "A61",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Smalley, B, Anderson, DR, Collier-Cameron, A, Doyle, AP, Fumel, A, Gillon, M, Hellier, C, Jehin, E, Lendl, M, Maxted, PFL, Pepe, F, Pollacco, D, Queloz, D, Ségransan, D, Smith, AMS, Southworth, J, Triaud, AHMJ, Udry, S & West, RG 2012, 'WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus', Astronomy and Astrophysics, vol. 547, pp. A61. https://doi.org/10.1051/0004-6361/201219731

TY - JOUR

T1 - WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus

AU - Smalley, B.

AU - Anderson, D.~R.

AU - Collier-Cameron, A.

AU - Doyle, A.~P.

AU - Fumel, A.

AU - Gillon, M.

AU - Hellier, C.

AU - Jehin, E.

AU - Lendl, M.

AU - Maxted, P.~F.~L.

AU - Pepe, F.

AU - Pollacco, D.

AU - Queloz, D.

AU - Ségransan, D.

AU - Smith, A.~M.~S.

AU - Southworth, J.

AU - Triaud, A.~H.~M.~J.

AU - Udry, S.

AU - West, R.~G.

PY - 2012/11/1

Y1 - 2012/11/1

N2 - We report the discovery of WASP-78b and WASP-79b, two highly-bloated Jupiter-mass exoplanets orbiting F-type host stars. WASP-78b orbits its V = 12.0 host star (TYC 5889-271-1) every 2.175 days and WASP-79b orbits its V = 10.1 host star (CD-30 1812) every 3.662 days. Planetary parameters have been determined using a simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements. For WASP-78b a planetary mass of 0.89 plusmn 0.08 M$_Jup$ and a radius of 1.70 plusmn 0.11 R$_Jup$ is found. The planetary equilibrium temperature of T$_P$ = 2350 plusmn 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. WASP-79b its found to have a planetary mass of 0.90 plusmn 0.08 M$_Jup$, but with a somewhat uncertain radius due to lack of sufficient TRAPPIST photometry. The planetary radius is at least 1.70 plusmn 0.11 R$_Jup$, but could be as large as 2.09 plusmn 0.14 R$_Jup$, which would make WASP-79b the largest known exoplanet. Photometric data is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/547/A61Table 1 is available in electronic form at http://www.aanda.org

AB - We report the discovery of WASP-78b and WASP-79b, two highly-bloated Jupiter-mass exoplanets orbiting F-type host stars. WASP-78b orbits its V = 12.0 host star (TYC 5889-271-1) every 2.175 days and WASP-79b orbits its V = 10.1 host star (CD-30 1812) every 3.662 days. Planetary parameters have been determined using a simultaneous fit to WASP and TRAPPIST transit photometry and CORALIE radial-velocity measurements. For WASP-78b a planetary mass of 0.89 plusmn 0.08 M$_Jup$ and a radius of 1.70 plusmn 0.11 R$_Jup$ is found. The planetary equilibrium temperature of T$_P$ = 2350 plusmn 80 K for WASP-78b makes it one of the hottest of the currently known exoplanets. WASP-79b its found to have a planetary mass of 0.90 plusmn 0.08 M$_Jup$, but with a somewhat uncertain radius due to lack of sufficient TRAPPIST photometry. The planetary radius is at least 1.70 plusmn 0.11 R$_Jup$, but could be as large as 2.09 plusmn 0.14 R$_Jup$, which would make WASP-79b the largest known exoplanet. Photometric data is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/547/A61Table 1 is available in electronic form at http://www.aanda.org

KW - planets and satellites: general, stars: individual: WASP-78, stars: individual: WASP-79, techniques: spectroscopic, techniques: radial velocities, techniques: photometric

U2 - 10.1051/0004-6361/201219731

DO - 10.1051/0004-6361/201219731

M3 - Article

SN - 0004-6361

VL - 547

SP - A61

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

WASP-78b and WASP-79b: two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus

Abstract

Keywords

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