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Your search keyword '"Lachurié, J. C."' showing total 3 results
Start Over Author "Lachurié, J. C." Topic astrophysics - earth and planetary astrophysics
3 results on '"Lachurié, J. C."'

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

Author

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

Subjects
Astrophysics - Earth and Planetary Astrophysics
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., Comment: Submitted to ApJ

Published
2016
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2. Photo-dynamical mass determination of the multi-planetary system K2-19

Author

Barros, S. C. C., Almenara, J. M., Demangeon, O., Tsantaki, M., Santerne, A., Armstrong, D. J., Barrado, D., Brown, D., Deleuil, M., Lillo-Box, J., Osborn, H., Pollacco, D., Abe, L., Andre, P., Bendjoya, P., Boisse, I., Bonomo, A. S., Bouchy, F., Bruno, G., Cerda, J. Rey, Courcol, B., Díaz, R. F., Hébrard, G., Kirk, J., Lachurié, J. C., Lam, K. W. F., Martinez, P., McCormac, J., Moutou, C., Rajpurohit, A., Rivet, J. -P., Spake, J., Suarez, O., Toublanc, D., and Walker, S. R.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

K2-19 is the second multi-planetary system discovered with K2 observations. The system is composed of two Neptune size planets close to the 3:2 mean-motion resonance. To better characterise the system we obtained two additional transit observations of K2-19b and five additional radial velocity observations. These were combined with K2 data and fitted simultaneously with the system dynamics (photo-dynamical model) which increases the precision of the transit time measurements. The higher transit time precision allows us to detect the chopping signal of the dynamic interaction of the planets that in turn permits to uniquely characterise the system. Although the reflex motion of the star was not detected, dynamic modelling of the system allowed us to derive planetary masses of $M_b= 44 \pm 12\, M_{\oplus}$ and $M_c = 15.9 \pm 7.0\, M_{\oplus}$ for the inner and the outer planets respectively, leading to densities close to Uranus. We also show that our method allows the derivation of mass ratios using only the 80 days of observations during the first campaign of K2., Comment: 10 pages, 7 figures, 2 tables, MNRAS accepted

Published
2015
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3. EPIC211089792 b: an aligned and inflated hot jupiter in a young visual binary

Author

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

Subjects
Earth and Planetary Astrophysics (astro-ph.EP), FOS: Physical sciences, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Earth and Planetary Astrophysics
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., Submitted to ApJ

Published
2016

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