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pro vyhledávání: '"Vaz, L. A. A."'
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
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As PANCs vêm ganhando visibilidade e espaço como uma nova fonte alimentícia, trazendo diversidade na alimentação das pessoas em todo mundo. O presente estudo aborda o levantamento e caracterização das PANCs encontradas no Parque Municipal Shan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01950286c08f120dd178256c78074d1f