Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Vidotto, Aline"'
Hot Jupiters might reside inside the Alfv\'en surface of their host star wind, where the stellar wind is dominated by magnetic energy. The implications of such a sub-Alfv\'enic environment for atmospheric escape are not fully understood. Here, we emp
Externí odkaz:
http://arxiv.org/abs/2410.08881
Autor:
Namekata, Kosuke, Ikuta, Kai, Petit, Pascal, Airapetian, Vladimir S., Vidotto, Aline A., Heinzel, Petr, Wollmann, Jiří, Maehara, Hiroyuki, Notsu, Yuta, Inoue, Shun, Marsden, Stephen, Morin, Julien, Jeffers, Sandra V., Neiner, Coralie, Paudel, Rishi R., Avramova-Boncheva, Antoaneta A., Gendreau, Keith, Shibata, Kazunari
EK Draconis, a nearby young solar-type star (G1.5V, 50-120 Myr), is known as one of the best proxies for inferring the environmental conditions of the young Sun. The star frequently produces superflares and Paper I presented the first evidence of an
Externí odkaz:
http://arxiv.org/abs/2410.05523
AB Dor is a young solar-type star with a surface large-scale magnetic field $10^2$ to $10^3$ times stronger than the that of the Sun. Although strong magnetic fields are thought to inhibit coronal mass ejections (CMEs), dimming signatures typically a
Externí odkaz:
http://arxiv.org/abs/2408.00637
Autor:
Egan, Arika, France, Kevin, Sreejith, Aickara Gopinathan, Fossati, Luca, Koskinen, Tommi, Fleming, Brian, Nell, Nicholas, Suresh, Ambily, Cauley, P. Wilson, Desert, Jean-Michele, Petit, Pascal, Vidotto, Aline A.
We present new near-ultraviolet (NUV, $\lambda$ = 2479 $-$ 3306 $\r{A}$) transmission spectroscopy of KELT-9b, the hottest known exoplanet, obtained with the Colorado Ultraviolet Transit Experiment ($CUTE$) CubeSat. Two transits were observed on Sept
Externí odkaz:
http://arxiv.org/abs/2407.13656
Autor:
Alam, Munazza K., Kirk, James, Santos, Leonardo A. Dos, McCreery, Patrick, Allan, Andrew P., Owen, James E., Vidotto, Aline A., Allart, Romain, Bourrier, Vincent, Espinoza, Néstor, King, George W., López-Morales, Mercedes, Seidel, Julia V.
We search for excess in-transit absorption of neutral helium at 1.083 $\mu$m in the atmospheres of the young (<800 Myr) sub-Jovian (0.2-0.5 $\rm R_{J}$) planets HD 63433b, K2-100b, and V1298 Tau c using high-resolution (R~25,000) transit observations
Externí odkaz:
http://arxiv.org/abs/2405.17294
Autor:
Namekata, Kosuke, Airapetian, Vladimir S., Petit, Pascal, Maehara, Hiroyuki, Ikuta, Kai, Inoue, Shun, Notsu, Yuta, Paudel, Rishi R., Arzoumanian, Zaven, Avramova-Boncheva, Antoaneta A., Gendreau, Keith, Jeffers, Sandra V., Marsden, Stephen, Morin, Julien, Neiner, Coralie, Vidotto, Aline A., Shibata, Kazunari
Young solar-type stars frequently produce superflares, serving as a unique window into the young Sun-Earth environments. Large solar flares are closely linked to coronal mass ejections (CMEs) associated with filament/prominence eruptions, but its obs
Externí odkaz:
http://arxiv.org/abs/2311.07380
Autor:
Allan, Andrew P., Vidotto, Aline A., D'Angelo, Carolina Villarreal, Santos, Leonardo A. Dos, Driessen, Florian A.
Atmospheric escape in exoplanets has traditionally been observed using hydrogen Lyman-$\alpha$ and H-$\alpha$ transmission spectroscopy, but more recent detections have utilised the metastable helium triplet at 1083$~$nm. Since this feature is access
Externí odkaz:
http://arxiv.org/abs/2311.01313
Autor:
Metcalfe, Travis S., Buzasi, Derek, Huber, Daniel, Pinsonneault, Marc H., van Saders, Jennifer L., Ayres, Thomas R., Basu, Sarbani, Drake, Jeremy J., Egeland, Ricky, Kochukhov, Oleg, Petit, Pascal, Saar, Steven H., See, Victor, Stassun, Keivan G., Li, Yaguang, Bedding, Timothy R., Breton, Sylvain N., Finley, Adam J., Garcia, Rafael A., Kjeldsen, Hans, Nielsen, Martin B., Ong, J. M. Joel, Rorsted, Jakob L., Stokholm, Amalie, Winther, Mark L., Clark, Catherine A., Godoy-Rivera, Diego, Ilyin, Ilya V., Strassmeier, Klaus G., Jeffers, Sandra V., Marsden, Stephen C., Vidotto, Aline A., Baliunas, Sallie, Soon, Willie
Publikováno v:
Astron. J. 166, 167 (2023)
The bright star $\lambda$ Ser hosts a hot Neptune with a minimum mass of 13.6 $M_\oplus$ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation period of 25.8 days and surface differential rotation very similar to the Sun. W
Externí odkaz:
http://arxiv.org/abs/2308.09808
Autor:
Sreejith, A. G., France, Kevin, Fossati, Luca, Koskinen, Tommi T., Egan, Arika, Cauley, P. Wilson, Cubillos, Patricio. E., Ambily, S., Huang, Chenliang, Lavvas, 5 Panayotis, Fleming, Brian T., Desert, Jean-Michel, Nell, Nicholas, Petit, Pascal, Vidotto, Aline
Ultraviolet observations of Ultra-hot Jupiters (UHJs), exoplanets with temperatures over 2000\,K, provide us with an opportunity to investigate if and how atmospheric escape shapes their upper atmosphere. Near-ultraviolet transit spectroscopy offers
Externí odkaz:
http://arxiv.org/abs/2308.05726
Autor:
Edwards, Billy, Changeat, Quentin, Tsiaras, Angelos, Allan, Andrew, Behr, Patrick, Hagey, Simone R., Himes, Michael D., Ma, Sushuang, Stassun, Keivan G., Thomas, Luis, Thompson, Alexandra, Boley, Aaron, Booth, Luke, Bouwman, Jeroen, France, Kevin, Lowson, Nataliea, Meech, Annabella, Phillips, Caprice L., Vidotto, Aline A., Yip, Kai Hou, Bieger, Michelle, Gressier, Amelie, Janin, Estelle, Jiang, Ing-Guey, Leonardi, Pietro, Sarkar, Subhajit, Skaf, Nour, Taylor, Jake, Yang, Ming, Ward-Thompson, Derek
We present an atmospheric analysis of LTT 9779 b, a rare planet situated in the hot Neptune desert, that has been observed with HST WFC3 G102 and G141. The combined transmission spectrum, which covers 0.8 - 1.6 $\mu$m, shows a gradual increase in tra
Externí odkaz:
http://arxiv.org/abs/2306.13645