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

Journal Article · Fri Jun 10 04:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/824/1/55· OSTI ID:22666189

Santerne, A.; Barros, S. C. C.; Mena, E. Delgado; Montalto, M.; Sousa, S. G.; Adibekyan, V. ^[1]; Hébrard, G. ^[2]; Lillo-Box, J.; Barrado, D. ^[3]; Armstrong, D. J.; Pollacco, D.; Osborn, H. P. ^[4]; Demangeon, O.; Deleuil, M. ^[5]; Debackere, A.; Arlic, G.; Barthe, G. ^[6]; Abe, L. ^[7]; Almenara, J. -M. ^[8]; others, and

---

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)

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.

• OSTI ID: 22666189
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 824; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
BINARY STARS
DETECTION
DWARF STARS
JUPITER PLANET
MASS
PLANETS
RADIAL VELOCITY
RESOLUTION
ROTATION
SATELLITES
SPACE
SPIN
STARS