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Title: K2-29 b/WASP-152 b: AN ALIGNED AND INFLATED HOT JUPITER IN A YOUNG VISUAL BINARY

Abstract

In the present paper we report the discovery of a new hot Jupiter, K2-29 b, first detected by the Super-WASP observatory and then by the K2 space mission during its campaign 4. The planet has a period of 3.25 days, a mass of 0.73 ± 0.04 M {sub ♃}, and a radius of 1.19 ± 0.02 R {sub ♃}. The host star is a relatively bright ( V = 12.5) G7 dwarf with a nearby K5V companion. Based on stellar rotation and the abundance of lithium, we find that the system might be as young as ∼450 Myr. The observation of the Rossiter–McLaughlin effect shows that the planet is aligned with respect to the stellar spin. Given the deep transit (20 mmag), the magnitude of the star and the presence of a nearby stellar companion, the planet is a good target for both space- and ground-based transmission spectroscopy, in particular in the near-infrared where both stars are relatively bright.

Authors:
; ; ; ; ;  [1];  [2]; ;  [3]; ; ;  [4]; ;  [5]; ; ;  [6];  [7];  [8];  [9] more »; « less
  1. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, 4150-762 Porto (Portugal)
  2. Institut d’Astrophysique de Paris, UMR7095 CNRS, Université Pierre and Marie Curie, 98bis boulevard Arago, F-75014 Paris (France)
  3. Departamento de Astrofsica, Centro de Astrobiologa (CSIC-INTA), ESAC campus E-28692 Villanueva de la Caada (Madrid) (Spain)
  4. Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL (United Kingdom)
  5. Aix Marseille Université, CNRS, Laboratoire d’Astrophysique de Marseille UMR 7326, F-13388, Marseille (France)
  6. European Pro/Am Network of Exoplanetary Transit Observers (France)
  7. Laboratoire Lagrange, UMR7239, Université de Nice Sophia-Antipolis, CNRS, Observatoire de la Cote d’Azur, F-06300 Nice (France)
  8. Université Grenoble Alpes, IPAG, F-38000 Grenoble (France)
  9. Observatoire de Belesta-en-Lauragais-Assoc. Astronomie Adagio 30 Route de Revel, F-31450 Varennes (France)
Publication Date:
OSTI Identifier:
22666189
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 824; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; BINARY STARS; DETECTION; DWARF STARS; JUPITER PLANET; MASS; PLANETS; RADIAL VELOCITY; RESOLUTION; ROTATION; SATELLITES; SPACE; SPIN; STARS

Citation Formats

Santerne, A., Barros, S. C. C., Mena, E. Delgado, Montalto, M., Sousa, S. G., Adibekyan, V., Hébrard, G., Lillo-Box, J., Barrado, D., Armstrong, D. J., Pollacco, D., Osborn, H. P., Demangeon, O., Deleuil, M., Debackere, A., Arlic, G., Barthe, G., Abe, L., Almenara, J.-M., André, P., E-mail: alexandre.santerne@astro.up.pt, and and others. K2-29 b/WASP-152 b: AN ALIGNED AND INFLATED HOT JUPITER IN A YOUNG VISUAL BINARY. United States: N. p., 2016. Web. doi:10.3847/0004-637X/824/1/55.
Santerne, A., Barros, S. C. C., Mena, E. Delgado, Montalto, M., Sousa, S. G., Adibekyan, V., Hébrard, G., Lillo-Box, J., Barrado, D., Armstrong, D. J., Pollacco, D., Osborn, H. P., Demangeon, O., Deleuil, M., Debackere, A., Arlic, G., Barthe, G., Abe, L., Almenara, J.-M., André, P., E-mail: alexandre.santerne@astro.up.pt, & and others. K2-29 b/WASP-152 b: AN ALIGNED AND INFLATED HOT JUPITER IN A YOUNG VISUAL BINARY. United States. doi:10.3847/0004-637X/824/1/55.
Santerne, A., Barros, S. C. C., Mena, E. Delgado, Montalto, M., Sousa, S. G., Adibekyan, V., Hébrard, G., Lillo-Box, J., Barrado, D., Armstrong, D. J., Pollacco, D., Osborn, H. P., Demangeon, O., Deleuil, M., Debackere, A., Arlic, G., Barthe, G., Abe, L., Almenara, J.-M., André, P., E-mail: alexandre.santerne@astro.up.pt, and and others. Fri . "K2-29 b/WASP-152 b: AN ALIGNED AND INFLATED HOT JUPITER IN A YOUNG VISUAL BINARY". United States. doi:10.3847/0004-637X/824/1/55.
@article{osti_22666189,
title = {K2-29 b/WASP-152 b: AN ALIGNED AND INFLATED HOT JUPITER IN A YOUNG VISUAL BINARY},
author = {Santerne, A. and Barros, S. C. C. and Mena, E. Delgado and Montalto, M. and Sousa, S. G. and Adibekyan, V. and Hébrard, G. and Lillo-Box, J. and Barrado, D. and Armstrong, D. J. and Pollacco, D. and Osborn, H. P. and Demangeon, O. and Deleuil, M. and Debackere, A. and Arlic, G. and Barthe, G. and Abe, L. and Almenara, J.-M. and André, P., E-mail: alexandre.santerne@astro.up.pt and and others},
abstractNote = {In the present paper we report the discovery of a new hot Jupiter, K2-29 b, first detected by the Super-WASP observatory and then by the K2 space mission during its campaign 4. The planet has a period of 3.25 days, a mass of 0.73 ± 0.04 M {sub ♃}, and a radius of 1.19 ± 0.02 R {sub ♃}. The host star is a relatively bright ( V = 12.5) G7 dwarf with a nearby K5V companion. Based on stellar rotation and the abundance of lithium, we find that the system might be as young as ∼450 Myr. The observation of the Rossiter–McLaughlin effect shows that the planet is aligned with respect to the stellar spin. Given the deep transit (20 mmag), the magnitude of the star and the presence of a nearby stellar companion, the planet is a good target for both space- and ground-based transmission spectroscopy, in particular in the near-infrared where both stars are relatively bright.},
doi = {10.3847/0004-637X/824/1/55},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 824,
place = {United States},
year = {2016},
month = {6}
}