Výsledky vyhledávání - "Pierrehumbert R"

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Carbon cycle instability for high-$\mathrm{CO_2}$ exoplanets: Implications for habitability

Autor: Graham, R. J., Pierrehumbert, R. T.

Implicit in the definition of the classical circumstellar habitable zone (HZ) is the hypothesis that the carbonate-silicate cycle can maintain clement climates on exoplanets with land and surface water across a range of instellations by adjusting atm

Externí odkaz: http://arxiv.org/abs/2405.05396

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Cloud-convection feedback in brown dwarfs atmosphere

Autor: Lefèvre, Maxence, Tan, Xianyu, Lee, Elspeth K. H., Pierrehumbert, R. T.

Numerous observational evidence has suggested the presence of active meteorology in the atmospheres of brown dwarfs. A near-infrared brightness variability has been observed. Clouds have a major role in shaping the thermal structure and spectral prop

Externí odkaz: http://arxiv.org/abs/2203.08625

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K2 and Spitzer phase curves of the rocky ultra-short-period planet K2-141 b hint at a tenuous rock vapor atmosphere

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

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Evidence for disequilibrium chemistry from vertical mixing in hot Jupiter atmospheres. A comprehensive survey of transiting close-in gas giant exoplanets with warm-Spitzer/IRAC

Autor: Baxter, C., Désert, J-M., Tsai, S-M., Todorov, K. O., Bean, J. L., Deming, D., Parmentier, V., Fortney, J. J., Line, M., Thorngren, D., Pierrehumbert, R. T., Burrows, A., Showman, A. P.

[Abridged] Aims. We present a large atmospheric study of 49 gas giant exoplanets using infrared transmission photometry with Spitzer/IRAC at 3.6 and 4.5um. Methods. We uniformly analyze 70 photometric light curves of 33 transiting planets using our c

Externí odkaz: http://arxiv.org/abs/2103.07185

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Thermodynamic and Energetic Limits on Continental Silicate Weathering Strongly Impact the Climate and Habitability of Wet, Rocky Worlds

Autor: Graham, R. J., Pierrehumbert, R. T.

The "liquid water habitable zone" (HZ) concept is predicated on the ability of the silicate weathering feedback to stabilize climate across a wide range of instellations. However, representations of silicate weathering used in current estimates of th

Externí odkaz: http://arxiv.org/abs/2004.14058

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The climate and compositional variation of the highly eccentric planet HD 80606 b – the rise and fall of carbon monoxide and elemental sulfur

Autor: Tsai, S-M, Steinrueck, M, Parmentier, V, Lewis, N, Pierrehumbert, R

Publikováno v: Monthly Notices of the Royal Astronomical Society. 520:3867-3886

The gas giant HD 80606 b has a highly eccentric orbit (e $\sim$ 0.93). The variation due to the rapid shift of stellar irradiation provides a unique opportunity to probe the physical and chemical timescales and to study the interplay between climate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50e08f223c32c9cb2186cc015b2b2b00
https://doi.org/10.1093/mnras/stad214