Zobrazeno 1 - 10
of 561
pro vyhledávání: '"Koskinen T"'
Autor:
Stephenson, P., Koskinen, T. T., Brown, Z., Quémerais, E., Lavvas, P., Moses, J. I., Sandel, B., Yelle, R.
We examine Saturn's non-auroral (dayglow) emissions at Lyman-$\alpha$ observed by the {Cassini/UVIS} instrument from 2004 until 2016, to constrain meridional and seasonal trends in the upper atmosphere. We separate viewing geometry effects from trend
Externí odkaz:
http://arxiv.org/abs/2407.09389
Autor:
Fossati, L., Biassoni, F., Cappello, G. M., Borsa, F., Shulyak, D., Bonomo, A. S., Gandolfi, D., Haardt, F., Koskinen, T., Lanza, A. F., Nascimbeni, V., Sicilia, D., Young, M., Aresu, G., Bignamini, A., Brogi, M., Carleo, I., Claudi, R., Cosentino, R., Guilluy, G., Knapic, C., Malavolta, L., Mancini, L., Nardiello, D., Pinamonti, M., Pino, L., Poretti, E., Rainer, M., Rigamonti, F., Sozzetti, A.
Publikováno v:
A&A 676, A99 (2023)
We aim at extracting the transmission spectrum of the HI Balmer lines of the ultra-hot Jupiter (UHJ) KELT-20b/MASCARA-2b from observations and to further compare the results with what obtained through forward modelling accounting for non-local thermo
Externí odkaz:
http://arxiv.org/abs/2306.15776
Autor:
Chadney, J. M., Koskinen, T. T., Hu, X., Galand, M., Lavvas, P., Unruh, Y. C., Serigano, J., Hörst, S. M., Yelle, R. V.
We construct Saturn equatorial neutral temperature and density profiles of H, H$_2$, He, and CH$_4$, between 10$^{-12}$ and 1 bar using measurements from Cassini's Ion Neutral Mass Spectrometer (INMS) taken during the spacecraft's final plunge into S
Externí odkaz:
http://arxiv.org/abs/2110.08014
Autor:
Fossati, L., Young, M. E., Shulyak, D., Koskinen, T., Huang, C., Cubillos, P. E., France, K., Sreejith, A. G.
Publikováno v:
A&A 653, A52 (2021)
Several results indicate that the atmospheric temperature of the ultra-hot Jupiter KELT-9b in the main line formation region is a few thousand degrees higher than predicted by self-consistent models. We test whether non-local thermodynamic equilibriu
Externí odkaz:
http://arxiv.org/abs/2106.11263
Autor:
Fletcher, L. N., Sromovsky, L., Hue, V., Moses, J. I., Guerlet, S., West, R. A., Koskinen, T.
The incredible longevity of Cassini's orbital mission at Saturn has provided the most comprehensive exploration of a seasonal giant planet to date. This review explores Saturn's changing global temperatures, composition, and aerosol properties betwee
Externí odkaz:
http://arxiv.org/abs/2012.09288
Autor:
Cho, J. Y-K., Thrastarson, H. Th., Koskinen, T. T., Read, P. L., Tobias, S. M., Moon, W., Skinner, J. W.
We review the recent progress in understanding the jet structures on exoplanets as well as on and inside the Sun. The emphasis is on the more robust aspects of observation and numerical modeling that relate directly to jets. For the exoplanets, the p
Externí odkaz:
http://arxiv.org/abs/2010.09878
Autor:
Fossati, L., Shulyak, D., Sreejith, A. G., Koskinen, T., Young, M. E., Cubillos, P. E., Lara, L. M., France, K., Rengel, M., Cauley, P. W., Turner, J. D., Wyttenbach, A., Yan, F.
Publikováno v:
A&A 643, A131 (2020)
Context. Observationally constraining the atmospheric temperature-pressure (TP) profile of exoplanets is an important step forward for improving planetary atmosphere models, further enabling one to place the detection of spectral features and the mea
Externí odkaz:
http://arxiv.org/abs/2010.00997
Autor:
Serigano, J., Hörst, S. M., He, C., Gautier, T., Yelle, R. V., Koskinen, T. T., Trainer, M. G
The Cassini spacecraft's last orbits directly sampled Saturn's thermosphere and revealed a much more chemically complex environment than previously believed. Observations from the Ion and Neutral Mass Spectrometer (INMS) aboard Cassini provided compo
Externí odkaz:
http://arxiv.org/abs/2005.06554
Autor:
D'Angelo, C. Villarreal, Vidotto, A. A., Esquivel, A., Sgró, M. A., Koskinen, T., Fossati, L.
The growth of spectroscopic observations of exoplanetary systems allows the possibility of testing theoretical models and studying the interaction that exoplanetary atmospheres have with the wind and the energetic photons from the star. In this work,
Externí odkaz:
http://arxiv.org/abs/1912.03778
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