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

被引：55

作者：

Smalley, B. ^{[1
]}

Anderson, D. R. ^{[1
]}

Collier-Cameron, A. ^{[2
]}

Doyle, A. P. ^{[1
]}

Fumel, A. ^{[3
]}

Gillon, M. ^{[3
]}

Hellier, C. ^{[1
]}

Jehin, E. ^{[2
]}

Lendl, M. ^{[4
]}

Maxted, P. F. L. ^{[1
]}

Pepe, F. ^{[4
]}

Pollacco, D. ^{[5
]}

Queloz, D. ^{[4
]}

Segransan, D. ^{[4
]}

Smith, A. M. S. ^{[1
]}

Southworth, J. ^{[1
]}

Triaud, A. H. M. J. ^{[4
]}

Udry, S. ^{[4
]}

West, R. G. ^{[6
]}

机构：

[1] Univ Keele, Astrophys Grp, Keele ST5 5BG, Staffs, England

[2] Univ St Andrews, Sch Phys & Astron, SUPA, Haugh KY16 9SS, Fife, Scotland

[3] Univ Liege, Liege 1, Belgium

[4] Univ Geneva, Observ Geneve, CH-1290 Sauverny, Switzerland

[5] Queens Univ Belfast, Sch Math & Phys, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland

[6] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 547卷

关键词：

planets and satellites: general; stars: individual: WASP-78; stars: individual: WASP-79; techniques: spectroscopic; techniques: radial velocities; techniques: photometric; TRANSITING EXTRASOLAR PLANETS; GAS-GIANT PLANET; SOLAR-TYPE STAR; OHMIC DISSIPATION; THERMAL EMISSION; CORALIE SURVEY; LIGHT CURVES; LOW-DENSITY; PARAMETERS; RADII;

D O I：

10.1051/0004-6361/201219731

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 +/- 0.08 M-Jup and a radius of 1.70 +/- 0.11 R-Jup is found. The planetary equilibrium temperature of T-P = 2350 +/- 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 +/- 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 +/- 0.11 R-Jup, but could be as large as 2.09 +/- 0.14 R-Jup, which would make WASP-79b the largest known exoplanet.

引用

页数：7

共 2 条

[1] SOPHIE velocimetry of Kepler transit candidates: XV. KOI-614b, KOI-206b, and KOI-680b: A massive warm Jupiter orbiting a G0 metallic dwarf and two highly inflated planets with a distant companion around evolved F-type stars
Almenara, J.M.
Damiani, C.
Bouchy, F.
Havel, M.
Bruno, G.
Hébrard, G.
Diaz, R.F.
Deleuil, M.
Barros, S.C.C.
Boisse, I.
Bonomo, A.S.
Montagnier, G.
Santerne, A.
Astronomy and Astrophysics, 2015, 575
[2] SOPHIE velocimetry of Kepler transit candidates XV. KOI-614b, KOI-206b, and KOI-680b: a massive warm Jupiter orbiting a G0 metallic dwarf and two highly inflated planets with a distant companion around evolved F-type stars
Almenara, J. M.
Damiani, C.
Bouchy, F.
Havel, M.
Bruno, G.
Hebrard, G.
Diaz, R. F.
Deleuil, M.
Barros, S. C. C.
Boisse, I.
Bonomo, A. S.
Montagnier, G.
Santerne, A.
ASTRONOMY & ASTROPHYSICS, 2015, 575

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