Zobrazeno 1 - 10
of 209
pro vyhledávání: '"Vaz, L. A. A."'
The impact of disk-locking on the stellar properties related to magnetic activity from the theoretical point of view is investigated. We use the ATON stellar evolution code to calculate theoretical values of convective turnover times ($\tau_{\rm c}$)
Externí odkaz:
http://arxiv.org/abs/2411.07073
We investigate stellar magnetic activity from the theoretical point of view, by using stellar evolution models to calculate theoretical convective turnover times ($\tau_{\rm c}$) and Rossby numbers (${\rm Ro}$) for pre-main-sequence and main-sequence
Externí odkaz:
http://arxiv.org/abs/2212.13958
Publikováno v:
A&A 603, A106 (2017)
In the last decades, the early pre main sequence stellar rotational evolution picture has been constrained by studies targeting different young regions at a variety of ages. Observational studies suggest a mass-rotation dependence, and for some mass
Externí odkaz:
http://arxiv.org/abs/1704.02301
Publikováno v:
A&A 586, A96 (2016)
Rotational evolution in young stars is described by pMS evolutionary tracks including rotation, conservation of angular momentum (AM), and simulations of disk-locking (DL). By assuming that DL is the regulation mechanism for the stellar angular veloc
Externí odkaz:
http://arxiv.org/abs/1512.02095
Magnetic fields are at the heart of the observed stellar activity in late-type stars, and they are presumably generated by a dynamo mechanism at the interface layer between the radiative and the convective stellar regions. Since dynamo models are bas
Externí odkaz:
http://arxiv.org/abs/1001.2754
Publikováno v:
Astron.Astrophys.494:209-227,2009
In close binary systems, rotation and tidal forces of the component stars deform each other and destroy their spherical symmetry. We present new models for low-mass, pre-main sequence stars that include the combined distortion effects of tidal and ro
Externí odkaz:
http://arxiv.org/abs/0904.2535
Autor:
Huelamo, N., Vaz, L. P. R., Torres, C. A. O., Bergeron, P., Melo, C. H. F., Quast, G. R., Navascues, D. Barrado y, Sterzik, M. F., Chauvin, G., Bouy, H., Landin, N. R.
HIP96515A is a double-lined spectroscopic binary with a visual companion (HIP96515B) at 8.6 arcsec. It is included in the SACY catalog as a potential young star and classified as an eclipsing binary in the ASAS Catalog. We have analyzed spectroscopic
Externí odkaz:
http://arxiv.org/abs/0902.0305
Autor:
Clausen, J. V., Vaz, L. P. R., Garcia, J. M., Gimenez, A., Helt, B. E., Olsen, E. H., Andersen, J.
CONTEXT: Accurate mass, radius, and abundance determinations from binaries provide important information on stellar evolution, fundamental to central fields in modern astrophysics and cosmology. AIMS: Within the long-term Copenhagen Binary Project, w
Externí odkaz:
http://arxiv.org/abs/0806.3203
Detailed BVRI-Halpha photometry has been obtained for the ring galaxy HRG 2302. This is probably a still interacting system which shows two principal components: the target, which is a knotted ringed-disk, and the intruder, an elongated galaxy with t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9909425
Autor:
Lamas-Pinheiro, R., Henriques-Coelho, T., Fernandes, S., Correia, F., Ferraz, C., Guedes-Vaz, L., Azevedo, I., Estevão-Costa, J.
Publikováno v:
In Revista Portuguesa de Pneumologia (English Edition) May-June 2016 22(3):157-162
