Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Cowan, N. B."'
Autor:
Masson, A., Vinatier, S., Bézard, B., López-Puertas, M., Lampón, M., Debras, F., Carmona, A., Klein, B., Artigau, E., Dethier, W., Pelletier, S., Hood, T., Allart, R., Bourrier, V., Cadieux, C., Charnay, B., Cowan, N. B., Cook, N. J., Delfosse, X., Donati, J. -F., Gu, P. -G., Hébrard, G., Martioli, E., Moutou, C., Venot, O., Wyttenbach, A.
For several years, the metastable helium triplet line has been successfully used as a tracer to probe atmospheric escape in transiting exoplanets. This absorption in the near-infrared (1083.3 nm) can be observed from the ground using high-resolution
Externí odkaz:
http://arxiv.org/abs/2406.09225
Autor:
Almenara, J. M., Bonfils, X., Bryant, E. M., Jordán, A., Hébrard, G., Martioli, E., Correia, A. C. M., Astudillo-Defru, N., Cadieux, C., Arnold, L., Artigau, É., Bakos, G. Á., Barros, S. C. C., Bayliss, D., Bouchy, F., Boué, G., Brahm, R., Carmona, A., Charbonneau, D., Ciardi, D. R., Cloutier, R., Cointepas, M., Cook, N. J., Cowan, N. B., Delfosse, X., Nascimento, J. Dias do, Donati, J. -F., Doyon, R., Forveille, T., Fouqué, P., Gaidos, E., Gilbert, E. A., da Silva, J. Gomes, Hartman, J. D., Hesse, K., Hobson, M. J., Jenkins, J. M., Kiefer, F., Kostov, V. B., Laskar, J., Lendl, M., L'Heureux, A., Martins, J. H. C., Menou, K., Moutou, C., Murgas, F., Polanski, A. S., Rapetti, D., Sedaghati, E., Shang, H.
We report the discovery and characterisation of a giant transiting planet orbiting a nearby M3.5V dwarf (d = 80.4 pc, $G$ = 15.1 mag, $K$=11.2 mag, R$_\star$ = 0.358 $\pm$ 0.015 R$_\odot$, M$_\star$ = 0.340 $\pm$ 0.009 M$_\odot$). Using the photometr
Externí odkaz:
http://arxiv.org/abs/2308.01454
Autor:
Allart, R., Lemée-Joliecoeur, P. -B., Jaziri, A. Y., Lafrenière, D., Artigau, E., Cook, N., Darveau-Bernier, A., Dang, L., Cadieux, C., Boucher, A., Bourrier, V., Deibert, E. K., Pelletier, S., Radica, M., Benneke, B., Carmona, A., Cloutier, R., Cowan, N. B., Delfosse, X., Donati, J. -F., Doyon, R., Figueira, P., Forveille, T., Fouqué, P., Gaidos, E., Gu, P. -G., Hébrard, G., Kiefer, F., Kóspál, Á, Jayawardhana, R., Martioli, E., Santos, L. A. Dos, Turner, H. Shang J. D., Vidotto, A.
Publikováno v:
A&A 677, A164 (2023)
The metastable helium triplet in the near-infrared (10833{\AA}) is among the most important probes of exoplanet atmospheres. It can trace their extended outer layers and constrain mass-loss. We use the near-infrared high-resolution spectropolarimeter
Externí odkaz:
http://arxiv.org/abs/2307.05580
Autor:
Zieba, S., Zilinskas, M., Kreidberg, L., Nguyen, T. G., Miguel, Y., Cowan, N. B., Pierrehumbert, R., Carone, L., Dang, L., Hammond, M., Louden, T., Lupu, R., Malavolta, L., Stevenson, K. B.
Publikováno v:
A&A 664, A79 (2022)
K2-141 b is a transiting, small (1.5 Re) ultra-short-period (USP) planet discovered by Kepler orbiting a K-dwarf host star every 6.7 hours. The planet's high surface temperature makes it an excellent target for thermal emission observations. Here we
Externí odkaz:
http://arxiv.org/abs/2203.00370
Autor:
von Essen, C., Mallonn, M., Piette, A., Cowan, N. B., Madhusudhan, N., Agol, E., Antoci, V., Poppenhaeger, K., Stassun, K. G., Khalafinejad, S., Tautvaišienė, G.
We present the detection and analysis of the phase curve of KELT-1b at optical wavelengths, analyzing data taken by the Transiting Exoplanet Survey Satellite (TESS). With a mass of ~27 M_J, KELT-1b is a low-mass brown dwarf. Due to the high mass and
Externí odkaz:
http://arxiv.org/abs/2006.09750
Akademický článek
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Only one exoplanet has so far been mapped in both longitude and latitude, but the James Webb Space Telescope should provide mapping-quality data for dozens of exoplanets. The thermal phase mapping problem has previously been solved analytically, with
Externí odkaz:
http://arxiv.org/abs/1806.05700
Low-resolution near-infrared spectroscopic signatures of unresolved ultracool companions to M dwarfs
Autor:
Cook, N. J., Pinfield, D. J., Marocco, F., Burningham, B., Jones, H. R. A., Frith, J., Zhong, J., Luo, A. L., Qi, Z. X., Cowan, N. B., Gromadzki, M., Kurtev, R. G., Guo, Y. X., Wang, Y. F., Song, Y. H., Yi, Z. P., Smart, R. L.
We develop a method to identify the spectroscopic signature of unresolved L-dwarf ultracool companions, which compares the spectra of candidates and their associated control stars using spectral ratio differences and residual spectra. We present SpeX
Externí odkaz:
http://arxiv.org/abs/1703.00463
Autor:
de Wit, J., Lewis, N. K., Knutson, H. A., Fuller, J., Antoci, V., Fulton, B. J., Laughlin, G., Deming, D., Shporer, A., Batygin, K., Cowan, N. B., Agol, E., Burrows, A. S., Fortney, J. J., Langton, J., Showman, A. P.
Publikováno v:
2017, ApJL, 836, L17
Extrasolar planets on eccentric short-period orbits provide a laboratory in which to study radiative and tidal interactions between a planet and its host star under extreme forcing conditions. Studying such systems probes how the planet's atmosphere
Externí odkaz:
http://arxiv.org/abs/1702.03797
Autor:
Cowan, N. B., Greene, T., Angerhausen, D., Batalha, N. E., Clampin, M., Colon, K., Crossfield, I. J. M., Fortney, J. J., Gaudi, B. S., Harrington, J., Iro, N., Lillie, C. F., Linsky, J. L., Lopez-Morales, M., Mandell, A. M., Stevenson, K. B.
[Abridged] We have only been able to comprehensively characterize the atmospheres of a handful of transiting planets, because most orbit faint stars. TESS will discover transiting planets orbiting the brightest stars, enabling, in principle, an atmos
Externí odkaz:
http://arxiv.org/abs/1502.00004