Zobrazeno 1 - 10
of 152
pro vyhledávání: '"Decressin T."'
Publikováno v:
EPJ Web of Conferences, Vol 43, p 01006 (2013)
Thermohaline mixing has been recently identified as the probable dominating process that governs the photospheric composition of low-mass bright red giant stars. Here, we present the predictions of stellar models computed with the code STAREVOL inclu
Externí odkaz:
https://doaj.org/article/7cc633d0914044e5a5590e9b213f254e
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
Multiple or extended turnoffs in young clusters in the Magellanic Clouds have recently received large attention. A number of studies have shown that they may be interpreted as the result of a significant age spread (several 10^8yr in clusters aged 1-
Externí odkaz:
http://arxiv.org/abs/1508.01932
Autor:
Aurière, M., Konstantinova-Antova, R., Charbonnel, C., Wade, G. A., Tsvetkova, S., Petit, P., Dintrans, B., Drake, N. A., Decressin, T., Lagarde, N., Donati, J. -F., Roudier, T., Lignières, F., Schröder, K. -P., Landstreet, J. D., Lèbre, A., Weiss, W. W., Zahn, J-P
Publikováno v:
A&A 574, A90 (2015)
We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. We use the spectropolarimeters Narval and ESPaDOnS to detect circular polarization within the
Externí odkaz:
http://arxiv.org/abs/1411.6230
We study the impact of internal gravity waves (IGW), meridional circulation, shear turbulence, and stellar contraction on the internal rotation profile and surface velocity evolution of solar metallicity low-mass pre-main sequence stars. We compute a
Externí odkaz:
http://arxiv.org/abs/1304.5470
A major paradigm shift has recently revolutionized our picture of globular clusters (GC) that were long thought to be simple systems of coeval stars born out of homogeneous material. Indeed, detailed abundance studies of GC long-lived low-mass stars
Externí odkaz:
http://arxiv.org/abs/1301.5016
Autor:
Tsvetkova, S., Petit, P., Auriere, M., Konstantinova-Antova, R., Wade, G. A., Charbonnel, C., Decressin, T., Bogdanovski, R.
The data were obtained using two spectropolarimeters - Narval at the Bernard Lyot Telescope, Pic du Midi, France, and ESPaDOnS at CFHT, Hawaii. Thirty-eight circularly-polarized spectra have been collected in the period June 2010 - January 2012. The
Externí odkaz:
http://arxiv.org/abs/1301.1592
We summarize the results presented in Krause et al. (2012) on the impact of supernova-driven shells and dark-remnant accretion on gas expulsion in globular cluster infancy.
Comment: 2 pages, 2 figures; Invited talk presented at Special Session 1
Comment: 2 pages, 2 figures; Invited talk presented at Special Session 1
Externí odkaz:
http://arxiv.org/abs/1211.0143
The availability of asteroseismic constraints for a large sample of stars from the missions CoRoT and Kepler paves the way for various statistical studies of the seismic properties of stellar populations. In this paper, we evaluate the impact of rota
Externí odkaz:
http://arxiv.org/abs/1204.5193
Context. The 3He content of Galactic HII regions is very close to that of the Sun and the solar system, and only slightly higher than the primordial 3He abundance as predicted by the standard Big Bang nucleosynthesis. However, the classical theory of
Externí odkaz:
http://arxiv.org/abs/1109.5704