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arXiv · 1601.07680

EPIC211089792 b: an aligned and inflated hot jupiter in a young visual binary

A. Santerne·G. Hébrard·J. Lillo-Box·D. J. Armstrong·S. C. C. Barros·O. Demangeon·D. Barrado·A. Debackere·M. Deleuil·E. Delgado Mena·M. Montalto·D. Pollacco·H. P. Osborn·S. G. Sousa·L. Abe·V. Adibekyan·J. -M. Almenara·P. André·G. Arlic·G. Barthe·P. Bendjoya·R. Behrend·I. Boisse·F. Bouchy·H. Boussier·M. Bretton·D. J. A. Brown·B. Carry·A. Cailleau·E. Conseil·B. Courcol·B. Dauchet·J. -C. Dalouzy·M. Deldem·P. Dubreuil·J. -M. Fehrenbach·S. Ferratfiat·R. Girelli·J. Gregorio·S. Jaecques·F. Kugel·J. Kirk·O. Labrevoir·J. -C. Lachurié·K. W. F. Lam·P. Le Guen·P. Martinez·L. Maurin·J. McCormac·J-B. Pioppa·U. Quadri·A. Rajpurohit·J. Rey·J. -P. Rivet·R. Roy·N. C. Santos·F. Signoret·L. Strabla·O. Suarez·D. Toublanc·M. Tsantaki·P. A. Wilson·M. Bachschmidt·F. Colas·O. Gerteis·P. Louis·J. -C. Mario·C. Marlot·J. Montier·V. Perroud·V. Pic·D. Romeuf·S. Ubaud·D. Verilhac
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Abstract

In the present paper we report the discovery of a new hot Jupiter, EPIC211089792 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 3.25d, a mass of 0.73 +/- 0.04 Mjup, and a radius of 1.19 +/- 0.02 Rjup. 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 about 450 Myr. The observation of the Rossiter-McLaughlin effect shows the planet is aligned with respect to the stellar spin. Given the deep transit (20mmag), 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 the both stars are relatively bright.

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A. Santerne, G. Hébrard, J. Lillo-Box, D. J. Armstrong, S. C. C. Barros, O. Demangeon, D. Barrado, A. Debackere, M. Deleuil, E. Delgado Mena, M. Montalto, D. Pollacco, H. P. Osborn, S. G. Sousa, L. Abe, V. Adibekyan, J. -M. Almenara, P. André, G. Arlic, G. Barthe, P. Bendjoya, R. Behrend, I. Boisse, F. Bouchy, H. Boussier, M. Bretton, D. J. A. Brown, B. Carry, A. Cailleau, E. Conseil, B. Courcol, B. Dauchet, J. -C. Dalouzy, M. Deldem, P. Dubreuil, J. -M. Fehrenbach, S. Ferratfiat, R. Girelli, J. Gregorio, S. Jaecques, F. Kugel, J. Kirk, O. Labrevoir, J. -C. Lachurié, K. W. F. Lam, P. Le Guen, P. Martinez, L. Maurin, J. McCormac, J-B. Pioppa, U. Quadri, A. Rajpurohit, J. Rey, J. -P. Rivet, R. Roy, N. C. Santos, F. Signoret, L. Strabla, O. Suarez, D. Toublanc, M. Tsantaki, P. A. Wilson, M. Bachschmidt, F. Colas, O. Gerteis, P. Louis, J. -C. Mario, C. Marlot, J. Montier, V. Perroud, V. Pic, D. Romeuf, S. Ubaud, D. Verilhac. 2016-01-28. EPIC211089792 b: an aligned and inflated hot jupiter in a young visual binary. https://doi.org/10.3847/0004-637x/824/1/55

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