Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Mathias, Philippe"'
Context. Betelgeuse is a red supergiant (RSG) that is known to vary semi-regularly on both short and long timescales. The origin of the short period of Betelgeuse has often been associated to radial pulsations but could also be due to the convection
Externí odkaz:
http://arxiv.org/abs/2410.08819
Autor:
Georgiev, Stefan, Lèbre, Agnès, Josselin, Eric, Mathias, Philippe, Konstantinova-Antova, Renada, Sabin, Laurence
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 522, Issue 3, July 2023, Pages 3861-3876
We present the surface magnetic field conditions of the brightest pulsating RV Tauri star, R Sct. Our investigation is based on the longest spectropolarimetric survey ever performed on this variable star. The analysis of high resolution spectra and c
Externí odkaz:
http://arxiv.org/abs/2305.07849
Autor:
Tessore, Benjamin, Lèbre, Agnès, Morin, Julien, Mathias, Philippe, Josselin, Eric, Aurière, Michel
Publikováno v:
A&A 603, A129 (2017)
RSG stars are very massive cool evolved stars. Recently, a weak magnetic field was measured at the surface of $\alpha$ Ori and this is so far the only M-type supergiant for which a direct detection of a surface magnetic field has been reported. By ex
Externí odkaz:
http://arxiv.org/abs/1704.07761
Autor:
Tessore, Benjamin, Lòpez-Ariste, Arturo, Mathias, Philippe, Lèbre, Agnès, Morin, Julien, Josselin, Eric
In the solar limb, linear polarisation is due to anisotropy of the radiation field induced by limb darkening. It is maximal when it is seen parallel to the limb and it vanishes when it is integrated over the spherically-symmetric solar disk. Therefor
Externí odkaz:
http://arxiv.org/abs/1702.02002
Autor:
Poretti, Ennio, Mathias, Philippe, Barban, Caroline, Baudin, Frederic, Miglio, Andrea, Montalban, Josefina, Morel, Thierry, Mosser, Benoit
The open cluster NGC 6633 was observed with CoRoT in 2011 and simultaneous high-resolution spectroscopy was obtained with the SOPHIE and HARPS spectrographs. One of the four targets was not found to be a cluster member. For all stars we provide estim
Externí odkaz:
http://arxiv.org/abs/1409.2274
Autor:
Poretti, Ennio, Rainer, Monica, Mantegazza, Luciano, Floquet, Michele, Mathias, Philippe, Amado, Pedro, Aerts, Conny, Uytterhoeven, Katrien, Group, the CoRoT Seismology Ground-Based Working
CoRoT photometric measurements of asteroseismic targets need complementary ground-based spectroscopic observations. We are using the planet-hunter HARPS spectrograph attached to the 3.6m-ESO telescope in the framework of two consecutive Large Program
Externí odkaz:
http://arxiv.org/abs/1202.3542
Autor:
Wright, Duncan, Chené, André-Nicolas, De Cat, Peter, Marois, Christian, Mathias, Philippe, Macintosh, Bruce, Isaacs, Josh, Lehmann, Holger, Hartmann, Michael
Direct imaging of the HR8799 system was a major achievement in the study of exoplanets. HR8799 is a $\gamma$\,Doradus variable and asteroseismology can provide an independent constraint on the inclination. Using 650 high signal-to-noise, high resolut
Externí odkaz:
http://arxiv.org/abs/1101.1590
The Toukomtore dam in Burkina Faso was built as a road embankment to meet the water needs of the populations of the commune of Koubri. The dam's watershed is not immune to the various climatic and anthropogenic pressures that have caused it to fill u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae69720d0a142a05d4790ac9928c9548
Autor:
Michel, Eric, Baglin, Annie, Auvergne, Michel, Catala, Claude, Samadi, Reza, Baudin, Frédéric, Appourchaux, Thierry, Barban, Caroline, Weiss, Werner W., Berthomieu, Gabrielle, Bournier, Patrick, Dupret, Marc-Antoine, Garcia, Rafael A., Fridlund, Malcolm, Garrido, Rafael, Goupil, Marie-Jo, Kjeldsen, Hans, Lebreton, Yveline, Mosser, Benoît, Grotsch-Noels, Arlette, Janot-Pacheco, Eduardo, Provost, Janine, Roxburgh, Ian W., Thoul, Anne, Toutain, Thierry, Tiphène, Didier, Turck-Chieze, Sylvaine, Vauclair, Sylvie D., Vauclair, Gérard P., Aerts, Conny, Alecian, Georges, Ballot, Jérôme, Charpinet, Stéphane, Hubert, Anne-Marie, Lignières, François, Mathias, Philippe, Monteiro, Mario J. P. F. G., Neiner, Coralie, Poretti, Ennio, de Medeiros, José Renan, Ribas, Ignasi, Rieutord, Michel L., Cortés, Teodoro Roca, Zwintz, Konstanze
Publikováno v:
Science, 2008 Oct . 322(5901), 558-560.
Externí odkaz:
https://www.jstor.org/stable/20145110
Autor:
Nardetto Nicolas, Poretti Ennio, Mérand Antoine, Anderson Richard I., Fokin Andrei, Fouqué Pascal, Gallenne Alexandre, Gieren Wolfgang, Graczyk Dariusz, Kervella Pierre, Mathias Philippe, Mourard Denis, Neilson Hilding, Pietrzynski Grzegorz, Pilecki Bogumil, Rainer Monica, Storm Jesper
Publikováno v:
EPJ Web of Conferences, Vol 152, p 07003 (2017)
Even ≃ 16000 cycles after its discovery by John Goodricke in 1783, δ Cep, the prototype of classical Cepheids, is still studied intensively in order to better understand its atmospheric dynamical structure and its environment. Using HARPS-N spectr
Externí odkaz:
https://doaj.org/article/4bf272bcf0f54637a02ee21c69b80518