Zobrazeno 1 - 10
of 132
pro vyhledávání: '"J. -P. Zahn"'
Autor:
J.-P. Zahn
Publikováno v:
EAS Publications Series. 63:245-254
The standard model of stellar structure is unable to account for various observational facts, such as anomalies in the surface composition, and there is now a broad consensus that some extra mixing must occur in the radiation zones, in addition to th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2adf4862a6bcf4c0e089b43b73ff368
https://doi.org/10.1051/eas/1363028
https://doi.org/10.1051/eas/1363028
Publikováno v:
Communications in Asteroseismology. 157:195-220
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bf80c389e2cf89c1f14b867b47063de
https://doi.org/10.1553/cia157s195
https://doi.org/10.1553/cia157s195
Autor:
J. P. Zahn
Publikováno v:
EAS Publications Series. 39:211-222
Magnetic fields have been detected at the surface of many stars, where they are responsible for various activity phenomena, and presumably they are present also in their deep interior. They channel stellar winds to large distance, thus increasing the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffb5af86cc0f7e40a686ba358eb66857
https://doi.org/10.1051/eas/0939011
https://doi.org/10.1051/eas/0939011
Autor:
J.-P. Zahn
Publikováno v:
EAS Publications Series. 26:49-64
Although it presently includes convective overshoot, microscopic diffusion, gravitational settling and radiative acceleration, the standard model of stellar structure is still unable to account for various observational facts, and there is now a larg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac426cf9b19d7c32c2efe40c9209e482
https://doi.org/10.1051/eas:2007125
https://doi.org/10.1051/eas:2007125
Autor:
J.-P. Zahn
Publikováno v:
EAS Publications Series. 19:147-163
The common way to build stellar models is to treat the radiation zones as inert, stable regions, in contrast with the well mixed convection zones. This allows to account for the main features of stellar evolution, such as the main sequence and the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4acdae32f4d49a8dda2c45b27a12cfd
https://doi.org/10.1051/eas:2006030
https://doi.org/10.1051/eas:2006030
Autor:
J.-P. Zahn
Publikováno v:
EAS Publications Series. 17:157-166
Due to radiative acceleration and gravitational settling, stars would display vast differences in their surface composition, if these were not smoothed out, at least partly, by some competing processes. Possible mechanisms have been suggested and exa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c6e55a482eba79351a62b2188e11314
https://doi.org/10.1051/eas:2005110
https://doi.org/10.1051/eas:2005110
Autor:
P. North, J.-P. Zahn
Publikováno v:
New Astronomy Reviews. 48:741-748
Making use of detached eclipsing binaries with B-type components discovered by the OGLE and MACHO teams in the SMC and in the LMC, we give the value of the fractional radius above which circularization occurs. This critical radius is around 0.24 to 0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16f86387a96f689e50c7227194d507c3
https://doi.org/10.1016/j.newar.2004.03.009
https://doi.org/10.1016/j.newar.2004.03.009
Autor:
J.-P. Zahn
Publikováno v:
EAS Publications Series. 13:63-79
Contrary to what is assumed in building standard stellar models, all stars undergo some mild mixing in their radiation zones. This mixing is due mainly to a slow thermally driven meridional circulation, and shear turbulence presumably contributes to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a506bdb1bf15f9ddf53d3eddd80a265
https://doi.org/10.1051/eas:2004050
https://doi.org/10.1051/eas:2004050
Autor:
Pierre North, J.-P. Zahn
Publikováno v:
Astronomy & Astrophysics. 405:677-684
Making use of detached eclipsing binaries discovered by the OGLE and MACHO teams in the SMC and in the LMC respectively, we give the value of the fractional radius above which circularization occurs. We show that this critical radius is consistent wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6c29899f72c6d8891faa25f0b1a3555
https://doi.org/10.1051/0004-6361:20030571
https://doi.org/10.1051/0004-6361:20030571
Publikováno v:
Astronomy & Astrophysics. 391:725-739
We have computed accurate 1-D solar models including both a macroscopic mixing process in the solar tachocline as well as up-to-date microscopic physical ingredients. Using sound speed and density profiles inferred through primary inversion of the so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4e5280b1181422d41fdff4b58d601cb
https://doi.org/10.1051/0004-6361:20020837
https://doi.org/10.1051/0004-6361:20020837