Zobrazeno 1 - 10
of 389
pro vyhledávání: '"Folsom, C. P."'
More than 30% of white dwarfs exhibit atmospheric metals, which are understood to be from recent or ongoing accretion of circumstellar debris. In cool white dwarfs, surface motions should rapidly homogenise photospheric abundances, and the accreted h
Externí odkaz:
http://arxiv.org/abs/2407.17196
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
Dynamically active planetary systems orbit a significant fraction of white dwarf stars. These stars often exhibit surface metals accreted from debris disks, which are detected through infrared excess or transiting structures. However, the full journe
Externí odkaz:
http://arxiv.org/abs/2402.16526
Discovering exoplanets orbiting young Suns can provide insight into the formation and early evolution of our own solar system, but the extreme magnetic activity of young stars obfuscates exoplanet detection. Here we monitor the long-term magnetic fie
Externí odkaz:
http://arxiv.org/abs/2401.12408
Autor:
Tsvetkova, S., Morin, J., Folsom, C. P., Bouquin, J. -B. Le, Alecian, E., Bellotti, S., Hussain, G., Kochukhov, O., Marsden, S. C., Neiner, C., Petit, P., Wade, G. A., collaboration, the BinaMIcS
This work is part of the BinaMIcS project, the aim of which is to understand the interaction between binarity and magnetism in close binary systems. All the studied spectroscopic binaries targeted by the BinaMIcS project encompass hot massive and int
Externí odkaz:
http://arxiv.org/abs/2312.04247
Autor:
Cristofari, P. I., Donati, J. -F., Moutou, C., Lehmann, L. T., Charpentier, P., Fouqué, P., Folsom, C. P., Masseron, T., Carmona, A., Delfosse, X., Petit, P., Artigau, E., Cook, N. J., consortium, the SLS
We present the results of an analysis aimed at probing the small-scale magnetic fields of M dwarfs observed with SPIRou, the nIR high-resolution spectro-polarimeter installed at the Canada-France-Hawaii Telescope, in the context of the SPIRou Legacy
Externí odkaz:
http://arxiv.org/abs/2310.08386
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:
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:
Donati, J. -F., Cristofari, P. I., Finociety, B., Klein, B., Moutou, C., Gaidos, E., Cadieux, C., Artigau, E., Correia, A. C. M., Boué, G., Cook, N. J., Carmona, A., Lehmann, L. T., Bouvier, J., Martioli, E., Morin, J., Fouqué, P., Delfosse, X., Royon, R., Hébrard, G., Alencar, S. H. P., Laskar, J., Arnold, L., Petit, P., Kospal, A., Vidotto, A., Folsom, C. P., collaboration, the SLS
In this paper we present an analysis of near-infrared spectropolarimetric and velocimetric data of the young M dwarf AU Mic, collected with SPIRou at the Canada-France-Hawaii telescope from 2019 to 2022, mostly within the SPIRou Legacy Survey. With t
Externí odkaz:
http://arxiv.org/abs/2304.09642
Autor:
Cristofari, P. I., Donati, J. -F., Folsom, C. P., Masseron, T., Fouqué, P., Moutou, C., Artigau, E., Carmona, A., Petit, P., Delfosse, X., Martioli, E.
We report first results on a method aimed at simultaneously characterising atmospheric parameters and magnetic properties of M dwarfs from high-resolution nIR spectra recorded with SPIRou in the framework of the SPIRou Legacy Survey. Our analysis rel
Externí odkaz:
http://arxiv.org/abs/2303.11241