Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Martayan, Christophe"'
Autor:
Labadie-Bartz, Jonathan, Baade, Dietrich, Carciofi, Alex C., Rubio, Amanda, Rivinius, Thomas, Borre, Camilla C., Martayan, Christophe, Siverd, Robert J.
In photometry of $\gamma$ Cas (B0.5 IVe) from the SMEI and BRITE-Constellation satellites, indications of low-order non-radial pulsation have recently been found, which would establish an important commonality with the class of classical Be stars at
Externí odkaz:
http://arxiv.org/abs/2012.06454
Autor:
Laverick, Mike, Lobel, Alex, Merle, Thibault, Royer, Pierre, Martayan, Christophe, David, Marc, Hensberge, Herman, Thienpont, Emmanuel
Publikováno v:
A&A 612, A60 (2018)
Fundamental atomic parameters, such as oscillator strengths, play a key role in modelling and understanding the chemical composition of stars in the universe. Despite the significant work underway to produce these parameters for many astrophysically
Externí odkaz:
http://arxiv.org/abs/1712.07678
Autor:
Boffin, Henri M. J., Rivinius, Thomas, Merand, Antoine, Mehner, Andrea, LeBouquin, Jean-Baptiste, Pourbaix, Dimitri, de Wit, Willem-Jan, Martayan, Christophe, Guieu, Sylvain
Publikováno v:
A&A 593, A90 (2016)
Luminous Blue Variables (LBVs) are massive stars caught in a post-main sequence phase, during which they are losing a significant amount of mass. As, on one hand, it is thought that the majority of massive stars are close binaries that will interact
Externí odkaz:
http://arxiv.org/abs/1607.07724
Autor:
Martayan, Christophe, Lobel, Alex, Baade, Dietrich, Mehner, Andrea, Rivinius, Thomas, Boffin, H. M. J., Girard, Julien, Mawet, Dimitri, Montagnier, Guillaume, Blomme, Ronny, Kervella, Pierre, Sana, Hugues, Štefl, Stanislav, Zorec, Juan, Lacour, Sylvestre, Bouquin, Jean-Baptiste Le, Martins, Fabrice, Mérand, Antoine, Patru, Fabien, Selman, Fernando, Frémat, Yves
Publikováno v:
A&A 587, A115 (2016)
Context. Luminous blue variables (LBVs) are rare massive stars with very high luminosity. They are characterized by strong photo-metric and spectroscopic variability related to transient eruptions. The mechanisms at the origin of these eruptions is n
Externí odkaz:
http://arxiv.org/abs/1601.03542
Autor:
Martayan, Christophe
Si dans la Voie Lactée les populations d'étoiles B et Be sont relativement bien connues, il n'en est pas de même pour celles des Nuages de Magellan. Les Grand et Petit Nuages de Magellan sont des galaxies satellites de notre Galaxie et sont connus
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00012203
http://tel.archives-ouvertes.fr/docs/00/06/73/62/PDF/thesemartayan.pdf
http://tel.archives-ouvertes.fr/docs/00/06/73/62/PDF/thesemartayan.pdf
Autor:
Martayan, Christophe, Zorec, Jean, Baade, Dietrich, Fremat, Yves, Ekstrom, Sylvia, Fabregat, Juan
According to recent theoretical studies, the progenitors of Long Gamma Ray Bursts should be very fast rotating stars, massive enough but not so for collapsing into a black hole. In addition, recent observations seem to show that stars of about 20 sol
Externí odkaz:
http://arxiv.org/abs/1110.3244
Autor:
Martayan, Christophe, Zorec, Jean, Baade, Dietrich, Fremat, Yves, Fabregat, Juan, Ekstrom, Sylvia
Several studies have shown recently that at low metallicity B-type stars rotate faster than in environments of high metallicity. This is a typical case in the SMC. As a consequence, it is expected that a larger number of fast rotators is found in the
Externí odkaz:
http://arxiv.org/abs/1010.3345
Autor:
Martayan, Christophe, Blomme, Ronny, Bouquin, Jean-Baptiste Le, Merand, Antoine, Montagnier, Guillaume, Selman, Fernando, Girard, Julien, Fox, Andrew, Baade, Dietrich, Fremat, Yves, Lobel, Alex, Martins, Fabrice, Patru, Fabien, Rivinius, Thomas, Sana, Hugues, Stefl, Stan, Zorec, Jean, Semaan, Thierry
We present multi-instruments and multi-wavelengths observations of the famous LBV star Pistol Star. These observations are part of a larger program about early O stars at different metallicities. The Pistol star has been claimed as the most massive s
Externí odkaz:
http://arxiv.org/abs/1010.3344
Autor:
Martayan, Christophe, Baade, Dietrich, Zorec, Jean, Fremat, Yves, Fabregat, Juan, Ekstrom, Sylvia
At low metallicity the B-type stars rotate faster than at higher metallicity, typically in the SMC. As a consequence, it was expected a larger number of fast rotators in the SMC than in the Galaxy, in particular more Be/Oe stars. With the ESO-WFI in
Externí odkaz:
http://arxiv.org/abs/1010.3343
Autor:
Martayan, Christophe, Blomme, Ronny, Bouquin, Jean-Baptiste Le, Merand, Antoine, Montagnier, Guillaume, Selman, Fernando, Girard, Julien, Fox, Andrew, Baade, Dietrich, Fremat, Yves, Lobel, Alex, Martins, Fabrice, Patru, Fabien, Rivinius, Thomas, Sana, Hugues, Stefl, Stan, Zorec, Jean, Semaan, Thierry
First results of near-IR adaptive optics (AO)-assisted imaging, interferometry, and spectroscopy of this Luminous Blue Variable (LBV) are presented. They suggest that the Pistol Star is at least double. If the association is physical, it would reinfo
Externí odkaz:
http://arxiv.org/abs/1010.3342