The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert

被引：43

作者：

Demangeon, O. D. S. ^{[1
]}

Faedi, F. ^{[2
,10
]}

Hebrard, G. ^{[3
,4
,5
]}

Brown, D. J. A. ^{[2
]}

Barros, S. C. C. ^{[1
]}

Doyle, A. P. ^{[2
]}

Maxted, P. F. L.

Cameron, A. Collier ^{[8
]}

Hay, K. L. ^{[8
]}

Alikakos, J. ^{[18
]}

Anderson, D. R. ^{[13
]}

Armstrong, D. J. ^{[7
]}

Boumis, P. ^{[18
]}

Bonomo, A. S. ^{[9
]}

Bouchy, F. ^{[6
]}

Delrez, L. ^{[11
,21
]}

Gillon, M. ^{[21
]}

Haswell, C. A. ^{[17
]}

Hellier, C. ^{[13
]}

Jehin, E. ^{[21
]}

Kiefer, F. ^{[3
]}

Lam, K. W. F. ^{[2
]}

Lendl, M. ^{[6
,20
]}

Mancini, L. ^{[9
,19
]}

McCormac, J. ^{[2
]}

Norton, A. J. ^{[17
]}

Osborn, H. P. ^{[2
]}

Palle, E. ^{[15
,16
]}

Pepe, F. ^{[6
]}

Pollacco, D. L. ^{[2
]}

Prieto-Arranz, J. ^{[15
,16
]}

Queloz, D. ^{[6
,11
]}

Segransan, D. ^{[6
]}

Smalley, B. ^{[13
]}

Triaud, A. H. M. J. ^{[12
,14
]}

Udry, S. ^{[6
]}

West, R. ^{[2
]}

Wheatley, P. J. ^{[2
]}

机构：

[1] Univ Porto, Inst Astrofis Ciencias Espaco, CAUP, Rua Estrelas, P-4150762 Porto, Portugal

[2] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[3] Univ Paris 06, Inst Astrophys Paris, CNRS, UMR7095, 98bis Blvd Arago, F-75014 Paris, France

[4] Univ Aix Marseille, Observ Haute Provence, F-04870 St Michel lObservatoire, France

[5] CNRS, F-04870 St Michel lObservatoire, France

[6] Univ Geneva, Observ Geneve, 51 Chemin Maillettes, CH-1290 Sauverny, Switzerland

[7] Queens Univ Belfast, Astrophys Res Ctr, Univ Rd, Belfast BT7 1NN, Antrim, North Ireland

[8] Univ St Andrews, Sch Phys & Astron, Ctr Exoplanet Sci, SUPA, St Andrews KY16 9SS, Scotland

[9] INAF Osservatorio Astrofisi Torino, Via Osservatorio 20, I-10025 Pino Torinese, Italy

[10] INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy

[11] Cavendish Lab, JJ Thompson Ave, Cambridge CB3 0HE, England

[12] Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

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

[14] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[15] Inst Astrofis Canarias, Tenerife 38205, Spain

[16] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[17] Open Univ, Sch Phys Sci, Milton Keynes MK7 6AA, Bucks, England

[18] Natl Observ Athens, Inst Astron Astrophys Space Applicat & Remote Sen, Penteli 15236, Greece

[19] Univ Roma Tor Vergata, Dept Phys, Via Ric Sci 1, I-00133 Rome, Italy

[20] Austrian Acad Sci, Space Res Inst, Schmiedlstr 6, A-8042 Graz, Austria

[21] Univ Liege, Space Sci Technol & Astrophys Res STAR Inst, Allee 6 Aout 17,Bat B5C, B-4000 Liege, Belgium

来源：

ASTRONOMY & ASTROPHYSICS | 2018年 / 610卷

关键词：

planets and satellites: detection; techniques: radial velocities; techniques: photometric; stars: individual: WASP-151; stars: individual: WASP-153; stars: individual: WASP-156; EXTRA-SOLAR PLANETS; 100 EARTH MASSES; CORALIE SURVEY; LIGHT CURVES; HOST STARS; KEPLER; ALGORITHM; MISSION; EXOPLANETS; EVOLUTION;

D O I：

10.1051/0004-6361/201731735

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

To investigate the origin of the features discovered in the exoplanet population, the knowledge of exoplanets mass and radius with a good precision (less than or similar to 10%) is essential. To achieve this purpose the discovery of transiting exoplanets around bright stars is of prime interest. In this paper, we report the discovery of three transiting exoplanets by the SuperWASP survey and the SOPHIE spectrograph with mass and radius determined with a precision better than 15%. WASP-151b and WASP-153b are two hot Saturns with masses, radii, densities and equilibrium temperatures of 0.31(-0.03)(+0.04) M-J, 1.13(-0.03)(+0.03) R-J, 0.22(-0.02)(+0.03) rho(J) and 1290(-10)(+20) K, and 0.39(-0.02)(+0.02) M-J, 1.55(-0.08)(+0.10) R-J, 0.11(-0.02)(+0.02) rho(J) and 1700(-40)(+40) K, respectively. Their host stars are early G type stars (with mag V similar to 13) and their orbital periods are 4.53 and 3.33 days, respectively. WASP-156b is a super-Neptune orbiting a K type star (mag V = 11.6). It has a mass of 0.128(-0.009)(+0.010) M-J, a radius of 0.51(-0.02)(+0.02) R-J, a density of 1.0(-0.1)(+0.1) rho(J), an equilibrium temperature of 970(-20)(+30) K and an orbital period of 3.83 days. The radius of WASP-151b appears to be only slightly inflated, while WASP-153b presents a significant radius anomaly compared to a recently published model. WASP-156b, being one of the few well characterized super-Neptunes, will help to constrain the still debated formation of Neptune size planets and the transition between gas and ice giants. The estimates of the age of these three stars confirms an already observed tendency for some stars to have gyrochronological ages significantly lower than their isochronal ages. We propose that high eccentricity migration could partially explain this behavior for stars hosting a short period planet. Finally, these three planets also lie close to (WASP-151b and WASP-153b) or below (WASP-156b) the upper boundary of the Neptunian desert. Their characteristics support that the ultra-violet irradiation plays an important role in this depletion of planets observed in the exoplanet population.

引用

页数：19

共 8 条

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