Zobrazeno 1 - 10
of 516
pro vyhledávání: '"Snellen, I."'
Due to the unprecedented signal strengths offered by the newest high-resolution spectrographs on 10-m class telescopes, exploring the 3D nature of exoplanets is possible with an unprecedented level of precision. In this paper, we present a new techni
Externí odkaz:
http://arxiv.org/abs/2409.03124
Autor:
Picos, D. González, Snellen, I. A. G., de Regt, S., Landman, R., Zhang, Y., Gandhi, S., Ginski, C., Kesseli, A. Y., Mollière, P., Stolker, T.
Publikováno v:
A&A 689, A212 (2024)
Young brown dwarfs exhibit atmospheric characteristics similar to those of super-Jupiters, providing a unique opportunity to study planetary atmospheres. The ESO SupJup Survey, utilizing CRIRES$^+$ on the Very Large Telescope, aims to assess the role
Externí odkaz:
http://arxiv.org/abs/2407.07678
Autor:
de Regt, S., Gandhi, S., Snellen, I. A. G., Zhang, Y., Ginski, C., Picos, D. González, Kesseli, A. Y., Landman, R., Mollière, P., Nasedkin, E., Sánchez-López, A., Stolker, T.
Publikováno v:
A&A 688, A116 (2024)
It has been proposed that the distinct formation and evolution of exoplanets and brown dwarfs may affect the chemical and isotopic content of their atmospheres. Recent work has indeed shown differences in the $^{12}$C/$^{13}$C isotope ratio, provisio
Externí odkaz:
http://arxiv.org/abs/2405.10841
Autor:
Palma-Bifani, P., Chauvin, G., Bonnefoy, M., Rojo, P. M., Petrus, S., Rodet, L., Langlois, M., Allard, F., Charnay, B., Desgrange, C., Homeier, D., Lagrange, A. -M., Beuzit, J. -L., Baudoz, P., Boccaletti, A., Chomez, A., Delorme, P., Desidera, S., Feldt, M., Ginski, C., Gratton, R., Maire, A. -L., Meyer, M., Samland, M., Snellen, I., Vigan, A., Zhang, Y.
Publikováno v:
A&A 670, A90 (2023)
We aim to revisit the system AB Pic which has a known companion at the exoplanet/ brown-dwarf boundary. We based this study on a rich set of observations to investigate the companion's orbit and atmosphere. We composed a spectrum of AB Pic b merging
Externí odkaz:
http://arxiv.org/abs/2211.01474
Autor:
Sánchez-López, A., Lin, L., Snellen, I. A. G., Casasayas-Barris, N., Muñoz, A. García, Lampón, M., López-Puertas, M.
Publikováno v:
A&A 666, L1 (2022)
Hydrogen and helium transmission signals trace the upper atmospheres of hot gas-giant exoplanets, where the incoming stellar extreme ultraviolet and X-ray fluxes are deposited. Further, for the hottest stars, the near-ultraviolet excitation of hydrog
Externí odkaz:
http://arxiv.org/abs/2209.01854
Autor:
Boccaletti, A., Chauvin, G., Wildi, F., Milli, J., Stadler, E., Diolaiti, E., Gratton, R., Vidal, F., Loupias, M., Langlois, M., Cantalloube, F., N'Diaye, M., Gratadour, D., Ferreira, F., Tallon, M., Mazoyer, J., Segransan, D., Mouillet, D., Beuzit, J. -L., Bonnefoy, M., Galicher, R., Vigan, A., Snellen, I., Feldt, M., Desidera, S., Rousseau, S., Baruffolo, A., Goulas, C., Baudoz, P., Bechet, C., Benisty, M., Bianco, A., Carry, B., Cascone, E., Charnay, B., Choquet, E., Christiaens, V., Cortecchia, F., de Caprio, V., De Rosa, A., Desgrange, C., D'Orazi, V., Douté, S., Frangiamore, M., Gendron, E., Ginski, C., Huby, E., Keller, C., Kulcsár, C., Landman, R., Lagarde, S., Lagadec, E., Lagrange, A. -M., Kasper, M. Lombini M., Ménard, F., Magnard, Y., Malaguti, G., Maurel, D., Mesa, D., Morgante, G., Pantin, E., Pichon, T., Potier, A., Rabou, P., Rochat, S., Terenzi, L., Thiébaut, E., Tallon-Bosc, I., Raynaud, H. -F., Rouan, D., Sevin, A., Schiavone, F., Schreiber, L., Zanutta, A.
SPHERE+ is a proposed upgrade of the SPHERE instrument at the VLT, which is intended to boost the current performances of detection and characterization for exoplanets and disks. SPHERE+ will also serve as a demonstrator for the future planet finder
Externí odkaz:
http://arxiv.org/abs/2209.02092
Autor:
Casasayas-Barris, N., Borsa, F., Pallé, E., Allart, R., Bourrier, V., Hernández, J. I. González, Kesseli, A., Sánchez-López, A., Osorio, M. R. Zapatero, Snellen, I. A. G., Orell-Miquel, J., Stangret, M., Esparza-Borges, E., Lovis, C., Hooton, M., Lend, M., Smith, A. M. S., Pepe, F., Rebolo, R., Cristiani, S., Santos, N. C., Adibekyan, V., Alibert, Y., Cristo, E., Demangeon, O. D. S., Figueira, P., Di Marcantonio, P., Martins, C. J. A. P., Micela, G., Seidel, J. V., Silva, T. Azevedo, Sousa, S. G., Sozzetti, A., Mascareño, A. Suárez, Tabernero, H. M.
Atmospheric studies at high spectral resolution have shown the presence of molecules, neutral and ionised metals, and hydrogen in the transmission spectrum of ultra-hot Jupiters, and have started to probe the dynamics of their atmospheres. We analyse
Externí odkaz:
http://arxiv.org/abs/2206.09443
Autor:
Sánchez-López, A., López-Puertas, M., García-Comas, M., Funke, B., Fouchet, T., Snellen, I. A. G.
Publikováno v:
A&A 662, A91 (2022)
Hydrocarbon species, and in particular CH$_4$, play a key role in the stratosphere--thermosphere boundary of Jupiter, which occurs around the $\mu$-bar pressure level. Previous analyses of solar occultation, He and Ly-$\alpha$ airglow, and ISO/SWS me
Externí odkaz:
http://arxiv.org/abs/2203.10086
Publikováno v:
A&A 661, A109 (2022)
Metal hydrides and oxides are important species in hot-Jupiters since they can affect their energy budgets and the thermal structure of their atmospheres. One such species is VO, which is prominent in stellar M-dwarf spectra. Evidence for VO has been
Externí odkaz:
http://arxiv.org/abs/2203.03585