Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Buldgen, G."'
The measurement of the internal rotation of post-main sequence stars using data from space-based photometry missions has demonstrated the need for an efficient angular momentum transport in stellar interiors. So far, no clear solution has emerged and
Externí odkaz:
http://arxiv.org/abs/2405.05699
Autor:
Buldgen, G., Noels, A., Scuflaire, R., Amarsi, A. M., Grevesse, N., Eggenberger, P., Colgan, J., Fontes, C. J., Baturin, V. A., Oreshina, A. V., Ayukov, S. V., Hakel, P., Kilcrease, D. P.
Due to the high quality constraints available for the Sun, we can carry out combined analyses using neutrino, spectroscopic and helioseismic observations. Such studies lay the ground for future improvements of key physical components of solar and ste
Externí odkaz:
http://arxiv.org/abs/2404.10478
We present evolutionary models of massive, accreting population III stars with constant and variable accretion rates until the end of silicon burning, with final masses of 1000 - 3000 Msol. In all our models, after the core-hydrogen-burning phase, th
Externí odkaz:
http://arxiv.org/abs/2309.04435
Autor:
Buldgen, G., Noels, A., Baturin, V. A., Oreshina, A. V., Ayukov, S. V., Scuflaire, R., Amarsi, A. M., Grevesse, N.
Context. The metal mass fraction of the Sun Z is a key constraint in solar modelling, but its value is still under debate. The standard solar chemical composition of the late 2000s have the ratio of metals to hydrogen Z/X = 0.0181, with a small incre
Externí odkaz:
http://arxiv.org/abs/2308.13368
Autor:
Deal, M., Goupil, M. -J., Cunha, M. S., Monteiro, M. J. P. F. G., Lebreton, Y., Christophe, S., Pereira, F., Samadi, R., Oreshina, A. V., Buldgen, G.
Publikováno v:
A&A 673, A49 (2023)
The transition between convective and radiative stellar regions is still not fully understood. The sharp variations in sound speed located in these transition regions give rise to a signature in specific seismic indicators, opening the possibility to
Externí odkaz:
http://arxiv.org/abs/2303.14026
Autor:
Buldgen, G., Eggenberger, P., Noels, A., Scuflaire, R., Amarsi, A. M., Grevesse, N., Salmon, S.
Publikováno v:
A&A 669, L9 (2023)
Context. The Sun acts as a cornerstone of stellar physics. Thanks to spectroscopic, helioseismic and neutrino flux observations, we can use the Sun as a laboratory of fundamental physics in extreme conditions. The conclusions we draw are then used to
Externí odkaz:
http://arxiv.org/abs/2212.06473
Publikováno v:
A&A 669, A2 (2023)
Context. With the detection of thousands of exoplanets, characterising their dynamical evolution in detail represents a key step in the understanding of their formation. Studying the dissipation of tides occurring both in the host star and in the pla
Externí odkaz:
http://arxiv.org/abs/2210.11535
Autor:
Bétrisey, J., Buldgen, G.
Publikováno v:
A&A 663, A92 (2022)
With the rapid development of asteroseismology thanks to space-based photometry missions such as CoRoT, Kepler, TESS, and in the future, PLATO, and the use of inversion techniques, quasi-model-independent constraints on the stellar properties can be
Externí odkaz:
http://arxiv.org/abs/2205.09625
Autor:
Moyano, F. D., Eggenberger, P., Meynet, G., Gehan, C., Mosser, B., Buldgen, G., Salmon, S. J. A. J.
Publikováno v:
A&A 663, A180 (2022)
Thanks to asteroseismology, constraints on the core rotation rate are available for hundreds of low- and intermediate-mass stars in evolved phases. Current physical processes tested in stellar evolution models cannot reproduce the evolution of these
Externí odkaz:
http://arxiv.org/abs/2205.03490
Autor:
Buldgen, G., Eggenberger, P.
The possibility of measuring the internal rotation of the Sun and stars thanks to helio- and asteroseismology offers tremendous constraints on hydro- and magnetohydrodynamical processes acting in stellar interiors. Understanding the processes respons
Externí odkaz:
http://arxiv.org/abs/2202.10086