Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Josselin, E"'
Autor:
Konstantinova-Antova, R., Georgiev, S., Lèbre, A., Palacios, A., Morin, J., Bogdanovski, R., Abbott, C., Baron, F., Aurière, M., Drake, N. A., Tsvetkova, S., Josselin, E., Paladini, C., Mathias, P., Zamanov, R.
We present a detailed long-term study of the single M6 III giant RZ~Ari to obtain direct and simultaneous measurements of the magnetic field, activity indicators, and radial velocity in order to infer the origin of its activity. We study its magnetic
Externí odkaz:
http://arxiv.org/abs/2312.12549
Autor:
Ariste, A. López, Georgiev, S., Mathias, Ph., Lèbre, A., Wavasseur, M., Josselin, E., Konstantinova-Antova, R., Roudier, Th.
Publikováno v:
A&A 661, A91 (2022)
Understanding convection in red supergiants and the mechanisms that trigger the mass loss from these evolved stars are the general goals of most observations of Betelgeuse and its inner circumstellar environment. Linear spectropolarimetry of the atom
Externí odkaz:
http://arxiv.org/abs/2202.12011
Autor:
Ariste, A. López, Mathias, P., Tessore, B., Lèbre, A., Aurière, M., Petit, P., Ikhenache, N., Josselin, E., Morin, J., Montargès, M.
Publikováno v:
A&A 620, A199 (2018)
We assess the ability to image the photosphere of red supergiants and, in particular Betelgeuse, through the modelling of the observed linear polarization in atomic spectral lines. We also aim to analyse the resulting images over time, to measure the
Externí odkaz:
http://arxiv.org/abs/1811.10362
Autor:
Mathias, P., Aurière, M., Ariste, A. López, Petit, P., Tessore, B., Josselin, E., Lèbre, A., Morin, J., Wade, G., Herpin, F., Chiavassa, A., Montargès, M., Konstantinova-Antova, R., Kervella, P., Perrin, G., Donati, J. -F., Grunhut, J.
Publikováno v:
A&A 615, A116 (2018)
Betelgeuse is an M-type supergiant that presents a circularly polarized (Stokes V) signal in its line profiles, interpreted in terms of a surface magnetic field. The weak circular polarization signal has been monitored over 7.5 years in order to foll
Externí odkaz:
http://arxiv.org/abs/1804.01831
Autor:
Acero, F., Acquaviva, J. -T., Adam, R., Aghanim, N., Allen, M., Alves, M., Ammanouil, R., Ansari, R., Araudo, A., Armengaud, E., Ascaso, B., Athanassoula, E., Aubert, D., Babak, S., Bacmann, A., Banday, A., Barriere, K., Bellossi, F., Bernard, J. -P., Bernardini, M. G., Béthermin, M., Blanc, E., Blanchet, L., Bobin, J., Boissier, S., Boisson, C., Boselli, A., Bosma, A., Bosse, S., Bottinelli, S., Boulanger, F., Boyer, R., Bracco, A., Briand, C., Bucher, M., Buat, V., Cambresy, L., Caillat, M., Casandjian, J. -M., Caux, E., Célestin, S., Cerruti, M., Charlot, P., Chassande-Mottin, E., Chaty, S., Christensen, N., Ciesla, L., Clerc, N., Cohen-Tanugi, J., Cognard, I., Combes, F., Comis, B., Corbel, S., Cordier, B., Coriat, M., Courtin, R., Courtois, H., Da Silva, B., Daddi, E., Dallier, R., Dartois, E., Demyk, K., Denis, J. -M., Denis, L., Djannati-Ataï, A., Donati, J. -F., Douspis, M., van Driel, W., Korso, M. N. El, Falgarone, E., Fantina, A., Farges, T., Ferrari, A., Ferrari, C., Ferrière, K., Flamary, R., Gac, N., Gauffre, S., Genova, F., Girard, J., Grenier, I., Griessmeier, J. -M., Guillard, P., Guillemot, L., Gulminelli, F., Gusdorf, A., Habart, E., Hammer, F., Hennebelle, P., Herpin, F., Hervet, O., Hughes, A., Ilbert, O., Janvier, M., Josselin, E., Julier, A., Lachaud, C., Lagache, G., Lallement, R., Lambert, S., Lamy, L., Langer, M., Larzabal, P., Lavaux, G., Bertre, T. Le, Fèvre, O. Le, Tiec, A. Le, Lefloch, B., Lehnert, M., Lemoine-Goumard, M., Levrier, F., Limousin, M., Lis, D., López-Sepulcre, A., Macias-Perez, J., Magneville, C., Marcowith, A., Margueron, J., Marquette, G., Marshall, D., Martin, L., Mary, D., Masson, S., Maurogordato, S., Mazauric, C., Mellier, Y., Miville-Deschênes, M. -A., Montier, L., Mottez, F., Mourard, D., Nesvadba, N., Nezan, J. -F., Noterdaeme, P., Novak, J., Ocvirk, P., Oertel, M., Olive, X., Ollier, V., Palanque-Delabrouille, N., Pandey-Pommier, M., Pennec, Y., Pérault, M., Peroux, C., Petit, P., Pétri, J., Petiteau, A., Pety, J., Pratt, G. W., Puech, M., Quertier, B., Raffin, E., Harison, S. Rakotozafy, Rawson, S., Renaud, M., Revenu, B., Richard, C., Richard, J., Rincon, F., Ristorcelli, I., Rodriguez, J., Schultheis, M., Schimd, C., Semelin, B., Sol, H., Starck, J. -L., Tagger, M., Tasse, C., Theureau, G., Torchinsky, S., Vastel, C., Vergani, S. D., Verstraete, L., Vigouroux, X., Vilmer, N., Vilotte, J. -P., Webb, N., Ysard, N., Zarka, P.
The "Square Kilometre Array" (SKA) is a large international radio telescope project characterised, as suggested by its name, by a total collecting area of approximately one square kilometre, and consisting of several interferometric arrays to observe
Externí odkaz:
http://arxiv.org/abs/1712.06950
Akademický článek
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Autor:
Aurière, M., Ariste, A. López, Mathias, P., Lèbre, A., Josselin, E., Montargès, M., Petit, P., Chiavassa, A., Paletou, F., Fabas, N., Konstantinova-Antova, R., Donati, J. -F., Grunhut, J. H., Wade, G. A., Herpin, F., Kervella, P., Perrin, G., Tessore, B.
Publikováno v:
A&A 591, A119 (2016)
Betelgeuse is an M supergiant that harbors spots and giant granules at its surface and presents linear polarization of its continuum. We have previously discovered linear polarization signatures associated with individual lines in the spectra of cool
Externí odkaz:
http://arxiv.org/abs/1605.04702
This article presents an on-line tool (rttools.irap.omp.eu) and its accompanying software ressources for the numerical solution of basic radiation transfer out of local thermodynamic equilibrium (LTE). State-of-the-art stationary iterative methods su
Externí odkaz:
http://arxiv.org/abs/1509.01158
Autor:
Ryde, N., Lambert, J., Farzone, M., Richter, M. J., Josselin, E., Harper, G. M., Eriksson, K., Greathouse, T. K.
Publikováno v:
A&A 573, A28 (2015)
The structures of the outer atmospheres of red giants are very complex. The notion of large optically thick molecular spheres around the stars (MOLspheres) has been invoked in order to explain e.g. spectro-interferometric observations. However, high-
Externí odkaz:
http://arxiv.org/abs/1410.3999
Autor:
Ryde, N., Lambert, J., Richter, M. J., Josselin, E., Harper, G. M., Eriksson, K., Boogert, A., DeWitt, C., Encrenaz, T., Greathouse, T., Jaffe, D., Kulas, K., McKelvey, M., Najita, J., Vacca, W.
The physical structures of the outer atmospheres of red giants are not known. They are certainly complex and a range of recent observations are showing that we need to embrace to non-classical atmosphere models to interpret these regions. This region
Externí odkaz:
http://arxiv.org/abs/1408.6055