Zobrazeno 1 - 10
of 275
pro vyhledávání: '"Auriere, M."'
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:
Aurière, M., Petit, P., Mathias, P., Konstantinova-Antova, R., Charbonnel, C., Donati, J. -F., Espagnet, O., Folsom, C. P., Roudier, T., Wade, G. A.
Publikováno v:
A&A 646, A130 (2021)
Context: Pollux is considered as an archetype of a giant star hosting a planet. We then discovered a weak magnetic field at its surface using spectropolarimetry. Aims and Methods: We followed up our investigations on Pollux first using ESPaDOnS at CF
Externí odkaz:
http://arxiv.org/abs/2101.02016
Autor:
Ariste, A. López, Tessore, B., Carlín, E. S., Mathias, Ph., Lèbre, A., Morin, J., Petit, P., Aurière, M., Gillet, D., Herpin, F.
Publikováno v:
A&A 632, A30 (2019)
Aims: From a coherent interpretation of the linear polarisation detected in the spectral lines of the Mira star $\chi$ Cyg, we derive information about the dynamics of the stellar photosphere, including pulsation. Methods: From spectropolarimetric ob
Externí odkaz:
http://arxiv.org/abs/1909.03720
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:
Charbonnel, C., Decressin, T., Lagarde, N., Gallet, F., Palacios, A., Auriere, M., Konstantinova-Antova, R., Mathis, S., Anderson, R. I., Dintrans, B.
Publikováno v:
A&A 605, A102 (2017)
Recent spectropolarimetric observations of otherwise ordinary G, K, and M giants revealed localized magnetic strips in the HRD coincident with the regions where the first dredge-up and core He-burning occur. We seek to understand the origin of magnet
Externí odkaz:
http://arxiv.org/abs/1703.10824
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
Publikováno v:
A&A 591, A57 (2016)
Context: When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase. Aims: We c
Externí odkaz:
http://arxiv.org/abs/1604.07647
Autor:
Montargès, M., Kervella, P., Perrin, G., Chiavassa, A., Bouquin, J. B. Le, Aurière, M., López-Ariste, A., Mathias, P., Ridgway, S. T., Lacour, S., Haubois, X., Berger, J. P.
Publikováno v:
A&A 588, A130 (2016)
Context. The mass-loss mechanism of cool massive evolved stars is poorly understood. The proximity of Betelgeuse makes it an appealing target to study its atmosphere, map the shape of its envelope, and follow the structure of its wind from the photos
Externí odkaz:
http://arxiv.org/abs/1602.05108
Autor:
Blazère, A., Petit, P., Lignières, F., Aurière, M., ballot, J., Böhm, T., Folsom, C. P., Gaurat, M., Jouve, L., Ariste, A. Lopez, Neiner, C., Wade, G. A.
An extremely weak circularly polarized signature was recently discovered in spectral lines of the chemically peculiar Am star Sirius A. A weak surface magnetic field was proposed to account for the observed polarized signal, but the shape of the phas
Externí odkaz:
http://arxiv.org/abs/1601.01829