Zobrazeno 1 - 10
of 228
pro vyhledávání: '"Hussain, G. A. J"'
Autor:
Bellotti, S., Evensberget, D., Vidotto, A. A., Lavail, A., Lueftinger, T., Hussain, G. A. J., Morin, J., Petit, P., Saikia, S. Boro, Danielski, C., Micela, G.
The accurate characterisation of the stellar magnetism of planetary host stars has been gaining momentum, especially in the context of transmission spectroscopy investigations of exoplanets. Indeed, the magnetic field regulates the amount of energeti
Externí odkaz:
http://arxiv.org/abs/2405.19052
We present a multiwavelength study of AB Doradus, combining modelling that incorporates a spectropolarimetric magnetic field map with 8.4 GHz radio interferometry to measure the coronal extent and density of this young star. We use the surface magnet
Externí odkaz:
http://arxiv.org/abs/2404.06304
Autor:
Bellotti, S., Morin, J., Lehmann, L. T., Petit, P., Hussain, G. A. J., Donati, J. -F., Folsom, C. P., Carmona, A., Martioli, E., Klein, B., Fouque, P., Moutou, C., Alencar, S., Artigau, E., Boisse, I., Bouchy, F., Bouvier, J., Cook, N. J., Delfosse, X., Doyon, R., Hebrard, G.
Dynamo models of stellar magnetic fields for partly and fully convective stars are guided by observational constraints. Zeeman-Doppler imaging has revealed a variety of magnetic field geometries and, for fully convective stars in particular, a dichot
Externí odkaz:
http://arxiv.org/abs/2403.08590
Autor:
Vidotto, A. A., Bourrier, V., Fares, R., Bellotti, S., Donati, J. F., Petit, P., Hussain, G. A. J., Morin, J.
Publikováno v:
A&A 678, A152 (2023)
The M dwarf star GJ 436 hosts a warm-Neptune that is losing substantial amount of atmosphere, which is then shaped by the interactions with the wind of the host star. The stellar wind is formed by particles and magnetic fields that shape the exo-spac
Externí odkaz:
http://arxiv.org/abs/2309.00324
Autor:
Nowacki, H., Alecian, E., Perraut, K., Zaire, B., Folsom, C. P., Pouilly, K., Bouvier, J., Manick, R., Pantolmos, G., Sousa, A. P., Dougados, C., Hussain, G. A. J., Alencar, S. H. P., Bouquin, J. B. Le
Publikováno v:
A&A 678, A86 (2023)
Aims : We aimed at constraining the accretion-ejection phenomena around the strongly-accreting Northern component of the S CrA young binary system (S CrA N) by deriving its magnetic field topology and its magnetospheric properties, and by detecting e
Externí odkaz:
http://arxiv.org/abs/2308.03442
Autor:
Amazo-Gómez, E. M., Alvarado-Gómez, J. D., Poppenhaeger, K., Hussain, G. A. J., Wood, B. E., Drake, J. J., Nascimento Jr., J. -D. do, Anthony, F., Sanz-Forcada, J., Stelzer, B., Donati, J. F., Del Sordo, F., Damasso, M., Redfield, S., König, P. C., Hébrard, G., Miles-Páez, P. A.
A comprehensive multi-wavelength campaign has been carried out to probe stellar activity and variability in the young Sun-like star $\iota$-Horologii. We present the results from long-term spectropolarimetric monitoring of the system by using the ult
Externí odkaz:
http://arxiv.org/abs/2307.01744
Autor:
Bellotti, S., Morin, J., Lehmann, L. T., Folsom, C. P., Hussain, G. A. J., Petit, P., Donati, J. F., Lavail, A., Carmona, A., Martioli, E., Zaire, B. Romano, Alecian, E., Moutou, C., Fouque, P., Alencar, S., Artigau, E., Boisse, I., Bouchy, F., Cadieux, C., Cloutier, R., Cook, N., Delfosse, X., Doyon, R., Hebrard, G., Kochukhov, O., Wade, G.
Publikováno v:
A&A 676, A56 (2023)
One manifestation of dynamo action on the Sun is the 22-yr magnetic cycle, exhibiting a polarity reversal and a periodic conversion between poloidal and toroidal fields. For M dwarfs, several authors claim evidence of activity cycles from photometry
Externí odkaz:
http://arxiv.org/abs/2307.01016
Autor:
Bellotti, S., Fares, R., Vidotto, A. A., Morin, J., Petit, P., Hussain, G. A. J., Bourrier, V., Donati, J. F., Moutou, C., Hebrard, E.
Publikováno v:
A&A 676, A139 (2023)
The space environment in which planets are embedded depends mainly on the host star and impacts the evolution of the planetary atmosphere. The quiet M dwarf GJ 436 hosts a close-in hot Neptune which is known to feature a comet-like tail of hydrogen a
Externí odkaz:
http://arxiv.org/abs/2306.15391
Autor:
Xiang, Yue, Gu, Shenghong, Donati, J. -F., Hussain, G. A. J., Cameron, A. Collier, collaboration, the MaTYSSE
We present a Zeeman-Doppler imaging study of two weak-line T Tauri stars TAP 4 and TAP 40, based on the high-resolution spectropolarimetric observations with ESPaDOnS at the Canada-France-Hawaii Telescope in November 2013, in the framework of the MaT
Externí odkaz:
http://arxiv.org/abs/2302.00426
Autor:
König, P. -C., Damasso, M., Hébrard, G., Naponiello, L., Cortés-Zuleta, P., Biazzo, K., Santos, N. C., Bonomo, A. S., Étangs, A. Lecavelier des, Zeng, L., Hoyer, S., Sozzetti, A., Affer, L., Almenara, J. M., Benatti, S., Bieryla, A., Boisse, I., Bonfils, X., Boschin, W., Carmona, A., Claudi, R., Collins, K. A., Dalal, S., Deleuil, M., Delfosse, X., Demangeon, O. D. S., Desidera, S., Díaz, R. F., Forveille, T., Heidari, N., Hussain, G. A. J., Jenkins, J., Kiefer, F., Lacedelli, G., Latham, D. W., Malavolta, L., Mancini, L., Martioli, E., Micela, G., Miles-Páez, P. A., Moutou, C., Nardiello, D., Nascimbeni, V., Pinamonti, M., Piotto, G., Ricker, G., Schwarz, R. P., Seager, S., Stognone, R. G., Strøm, P. A., Vanderspek, R., Winn, J., Wittrock, J.
Publikováno v:
A&A 666, A183 (2022)
We report the discovery and characterization of the transiting extrasolar planet TOI-1710$\:$b. It was first identified as a promising candidate by the Transiting Exoplanet Survey Satellite (TESS). Its planetary nature was then established with SOPHI
Externí odkaz:
http://arxiv.org/abs/2204.08984