☆ 4.6 Article

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

ASTRONOMY & ASTROPHYSICS (2018)

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ASTRONOMY & ASTROPHYSICS
Volume 610, Issue -, Pages -

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EDP SCIENCES S A
DOI: 10.1051/0004-6361/201731735

Keywords

planets and satellites: detection; techniques: radial velocities; techniques: photometric; stars: individual: WASP-151; stars: individual: WASP-153; stars: individual: WASP-156

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Astronomy & Astrophysics

Funding

  1. STFC [ST/M001296/1, ST/P000584/1, ST/P006892/1, ST/M000095/1, ST/P000495/1, ST/P002218/1, ST/R000824/1, ST/M003035/1] Funding Source: UKRI
  2. Science and Technology Facilities Council [ST/P002218/1, ST/P000495/1, ST/M000095/1, ST/P000584/1, ST/M003035/1, 1506589, ST/P006892/1, ST/M001296/1, ST/R000824/1] Funding Source: researchfish

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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.

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Article Astronomy & Astrophysics

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MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

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Article Astronomy & Astrophysics

Two warm Neptunes transiting HIP 9618 revealed by TESS and Cheops

H. P. Osborn, G. Nowak, G. Hebrard, T. Masseron, J. Lillo-Box, E. Palle, A. Bekkelien, H-G Floren, P. Guterman, A. E. Simon, V Adibekyan, A. Bieryla, L. Borsato, A. Brandeker, D. R. Ciardi, A. Collier Cameron, K. A. Collins, J. A. Egger, D. Gandolfi, M. J. Hooton, D. W. Latham, M. Lendl, E. C. Matthews, A. Tuson, S. Ulmer-Moll, A. Vanderburg, T. G. Wilson, C. Ziegler, Y. Alibert, R. Alonso, G. Anglada, L. Arnold, J. Asquier, D. Barrado y Navascues, W. Baumjohann, T. Beck, A. A. Belinski, W. Benz, F. Biondi, I Boisse, X. Bonfils, C. Broeg, L. A. Buchhave, T. Barczy, S. C. C. Barros, J. Cabrera, C. Cardona Guillen, I Carleo, A. Castro-Gonzalez, S. Charnoz, J. Christiansen, P. Cortes-Zuleta, S. Csizmadia, S. Dalal, M. B. Davies, M. Deleuil, X. Delfosse, L. Delrez, B-O Demory, A. B. Dunlavey, D. Ehrenreich, A. Erikson, R. B. Fernandes, A. Fortier, T. Forveille, L. Fossati, M. Fridlund, M. Gillon, R. F. Goeke, M. Goliguzova, E. J. Gonzales, M. N. Guenther, M. Guedel, N. Heidari, C. E. Henze, S. Howell, S. Hoyer, J. Frey, K. G. Isaak, J. M. Jenkins, F. Kiefer, L. Kiss, J. Korth, P. F. L. Maxted, J. Laskar, A. Lecavelier des Etangs, C. Lovis, M. B. Lund, R. Luque, D. Magrin, J. M. Almenara, E. Martioli, M. Mecina, J. Medina, D. Moldovan, M. Morales-Calderon, G. Morello, C. Moutou, F. Murgas, E. L. N. Jensen, V Nascimbeni, G. Olofsson, R. Ottensamer, I Pagano, G. Peter, G. Piotto, D. Pollacco, D. Queloz, R. Ragazzoni, N. Rando, H. Rauer, I Ribas, G. Ricker, O. D. S. Demangeon, A. M. S. Smith, N. Santos, G. Scandariato, S. Seager, S. G. Sousa, M. Steller, G. M. Szabo, D. Segransan, N. Thomas, S. Udry, B. Ulmer, V. Van Grootel, R. Vanderspek, N. Walton, J. N. Winn

Summary: HIP 9618 is a bright solar analogue with two candidate planets, HIP 9618 b and HIP 9618 c. Through targeted photometry and high-resolution spectroscopy, the true period of HIP 9618 c was determined to be 52.56349 days and the mass of HIP 9618 b was measured to be 10.0 +/- 3.1M(circle plus), while the mass of HIP 9618 c is estimated to be lower with an upper limit of <18M(circle plus).

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

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Article Astronomy & Astrophysics

Small body harvest with the Antarctic Search for Transiting Exoplanets (ASTEP) project

S. N. Hasler, A. Y. Burdanov, J. de Wit, G. Dransfield, L. Abe, A. Agabi, P. Bendjoya, N. Crouzet, T. Guillot, D. Mekarnia, F. X. Schmider, O. Suarez, A. H. M. J. Triaud

Summary: Small Solar system bodies are valuable records for understanding the formation and evolution of our Solar system. Interstellar objects can provide insights into exoplanetary system formation and planetary system evolution. This study presents the application of a framework to search for small Solar system bodies in data collected by the Antarctic Search for Transiting ExoPlanets (ASTEP) project. Known objects ranging from asteroids to comets were identified and future work will extend the pipeline to reach fainter objects.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

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Article Multidisciplinary Sciences

A super-massive Neptune-sized planet

Luca Naponiello, Luigi Mancini, Alessandro Sozzetti, Aldo S. Bonomo, Alessandro Morbidelli, Jingyao Dou, Li Zeng, Zoe M. Leinhardt, Katia Biazzo, Patricio E. Cubillos, Matteo Pinamonti, Daniele Locci, Antonio Maggio, Mario Damasso, Antonino F. Lanza, Jack J. Lissauer, Karen A. Collins, Philip J. Carter, Eric L. N. Jensen, Andrea Bignamini, Walter Boschin, Luke G. Bouma, David R. Ciardi, Rosario Cosentino, Silvano Desidera, Xavier Dumusque, Aldo F. M. Fiorenzano, Akihiko Fukui, Paolo Giacobbe, Crystal L. Gnilka, Adriano Ghedina, Gloria Guilluy, Avet Harutyunyan, Steve B. Howell, Jon M. Jenkins, Michael B. Lund, John F. Kielkopf, Katie V. Lester, Luca Malavolta, Andrew W. Mann, Rachel A. Matson, Elisabeth C. Matthews, Domenico Nardiello, Norio Narita, Emanuele Pace, Isabella Pagano, Enric Palle, Marco Pedani, Sara Seager, Joshua E. Schlieder, Richard P. Schwarz, Avi Shporer, Joseph D. Twicken, Joshua N. Winn, Carl Ziegler, Tiziano Zingales

Summary: Neptune-sized planets exhibit diverse compositions and densities, which are influenced by factors such as their distance from the host stars and atmospheric escape processes. TOI-1853 b, a planet in the hot-Neptune desert, has a mass almost twice that of any other Neptune-sized planet known so far and a high density dominated by heavy elements. The properties of TOI-1853 b challenge conventional theories of planetary formation and evolution and could be the result of multiple proto-planet collisions or the final state of a planet that migrated closer to its parent star.

NATURE (2023)

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Correction Multidisciplinary Sciences

A super-massive Neptune-sized planet (vol 622, pg 255, 2023)

Luca Naponiello, Luigi Mancini, Alessandro Sozzetti, Aldo S. Bonomo, Alessandro Morbidelli, Jingyao Dou, Li Zeng, Zoe M. Leinhardt, Katia Biazzo, Patricio E. Cubillos, Matteo Pinamonti, Daniele Locci, Antonio Maggio, Mario Damasso, Antonino F. Lanza, Jack J. Lissauer, Karen A. Collins, Philip J. Carter, Eric L. N. Jensen, Andrea Bignamini, Walter Boschin, Luke G. Bouma, David R. Ciardi, Rosario Cosentino, Ian Crossfield, Silvano Desidera, Xavier Dumusque, Aldo F. M. Fiorenzano, Akihiko Fukui, Paolo Giacobbe, Crystal L. Gnilka, Adriano Ghedina, Gloria Guilluy, Avet Harutyunyan, Steve B. Howell, Jon M. Jenkins, Michael B. Lund, John F. Kielkopf, Katie V. Lester, Luca Malavolta, Andrew W. Mann, Rachel A. Matson, Elisabeth C. Matthews, Domenico Nardiello, Norio Narita, Emanuele Pace, Isabella Pagano, Enric Palle, Marco Pedani, Sara Seager, Joshua E. Schlieder, Richard P. Schwarz, Avi Shporer, Joseph D. Twicken, Joshua N. Winn, Carl Ziegler, Tiziano Zingales

NATURE (2023)

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