Results 21 to 30 of about 69,893 (289)

Dynamical Stellar Masses of Pre-main-sequence Stars in Lupus and Taurus Obtained with ALMA Surveys in Comparison with Stellar Evolutionary Models [PDF]

The Astrophysical Journal, 2021
Abstract We analyzed archival molecular line data of pre-main-sequence (PMS) stars in the Lupus and Taurus star-forming regions obtained with ALMA surveys with an integration time of a few minutes per source. We stacked the data of 13CO and C18O (J = 2–1 and 3–2) and CN (N = 3–2, J = 7/2–5/2) lines to enhance the signal-to-noise ratios ...
Teresa A. M. Braun, Hsi-Wei Yen, Patrick M. Koch, Carlo F. Manara, Anna Miotello, Leonardo Testi   +5 more
openaire   +3 more sources

Evolutionary models of zero metallicity stars [PDF]

, 1999
We present new evolutionary models for zero-metallicity stars, covering a large range of initial masses (from 0.8 to 100 M_sun). Models are computed with overshooting from stellar cores and convective envelopes, and assuming mass-loss from the most ...
Chiosi, Cesare, Girardi, Leo, Marigo, Paola, Sarrubbi, Tiziana   +3 more
core   +2 more sources

Asteroseismological constraints on the pulsating planetary nebula nucleus (PG1159-type) RX J2117.1+3412 [PDF]

, 2006
We present asteroseismological inferences on RX J2117.1+3412, the hottest known pulsating PG1159 star. Our results are based on full PG1159 evolutionary models recently presented by Miller Bertolami & Althaus (2006).
A. H. Córsico, Alexander, Althaus, Appleton, Blöcker, Chen, Córsico, Córsico, Córsico, Gautschy, Gorny, Hajduk, Herwig, Iglesias, K. Werner, Kawaler, Koesterke, Koesterke, Koesterke, L. G. Althaus, Lawlor, M. M. Miller Bertolami, Miller Bertolami, Miller Bertolami, Motch, Nather, Schönberner, Tassoul, Tyne, Vauclair, Vauclair, Werner, Werner, Wood   +33 more
core   +2 more sources

Coupling emitted light and chemical yields from stars: a basic constraint to population synthesis models of galaxies [PDF]

, 2001
In this paper we emphasize the close connection between the chemical and spectrophotometric evolution of stellar systems: Chemical yields from stars correspond to a precise fraction of their emitted light.
Arimoto, Arimoto, Bertelli, Bressan, Chabrier, Charlot, Chiosi, Einsel, Ferreras, Fields, Frogel, Girardi, Girardi, Greggio, Herwig, Ibata, L. Girardi, Madau, Maeder, Maraston, Marigo, Marigo, P. Marigo, Portinari, Renzini, Renzini, Tinsley, Tuchman, van den Hoek, Vazdekis, Woosley   +30 more
core   +2 more sources

Intermediate-mass star models with different helium and metal contents [PDF]

, 2000
We present a comprehensive theoretical investigation of the evolutionary properties of intermediate-mass stars. The evolutionary sequences were computed from the Zero Age Main Sequence up to the central He exhaustion and often up to the phases which ...
Alibert Y., Amedeo Tornambe, Balona L. A., Balona L. A., Balona L. A., Balona L. A., Balona L. A., Becker S. A., Bertelli G., Bertelli G., Bressan A., Caldwell J. A ., Cassisi S., Chiappini C., Chin C. W., Chiosi C., Chiosi C., Deasy H. P., Esteban C., Filippina Caputo, Gascoigne S. C. B., Giuseppe Bono, Groenewegen M. A. T., Habets G. M. H. J., Laney C. D., Lauterborn D., Lauterborn D., Luciano Piersanti, Maeder A., Maeder A., Marcella Marconi, Meynet G., Nieuwenhuijzen H., Pagel B. E. J., Pamyatnykh A., Reimers D., Renzini A., Salaris M., Salasnich B., Santi Cassisi, Sasselov D. D., Schaerer D., Seaton M. J., Straniero O., Straniero O., Tornambe A., Udalski A., Udalski A., Waelkens C., Weiss A.   +49 more
core   +2 more sources

Applications of the k–ω Model in Stellar Evolutionary Models [PDF]

The Astrophysical Journal, 2017
Abstract The k–ω model for turbulence was first proposed by Kolmogorov. A new k–ω model for stellar convection was developed by Li, which could reasonably describe turbulent convection not only in the convectively unstable zone, but also in the overshooting regions.
openaire   +2 more sources

Evolutionary sequences of stellar models with new radiative opacities. VI. $Z=0.0001$ [PDF]

Astronomy and Astrophysics Supplement Series, 1996
We present a large grid of stellar evolutionary models with the initial chemical composition (Z = 0:0001;Y =0 :23). These tracks are conceived to extend the grid of stellar models described in the previous papers of this series, and are computed with the new radiative opacities by Iglesias et al. (1992) and convective overshoot.
Girardi, L., Bressan, A., Chiosi, C., Bertelli, G., Nasi, E.   +4 more
openaire   +1 more source

Stellar models: firm evidence, open questions and future developments [PDF]

, 2009
During this last decade our knowledge of the evolutionary properties of stars has significantly improved. This result has been achieved thanks to our improved understanding of the physical behavior of stellar matter in the thermal regimes characteristic ...
Bertelli, Bruzual, Cassisi, Cassisi, Castellani, Catelan, Girardi, Imbriani, Marigo, Marigo, Potekhin, Reimers, Salaris, Salaris, Santi Cassisi, van Loon, Zoccali   +16 more
core   +1 more source

Eclipsing binary stars as tests of stellar evolutionary models and stellar ages

Proceedings of the International Astronomical Union, 2008
AbstractEclipsing binary stars provide highly accurate measurements of the fundamental physical properties of stars. They therefore serve as stringent tests of the predictions of evolutionary models upon which most stellar age determinations are based.
Stassun, Keivan G., Hebb, Leslie, Lopez-Morales, Mercedes, Prsa, Andrej   +3 more
openaire   +2 more sources

The evolution of single B-type stars with a large angular momentum content [PDF]

, 2014
The database of intermediate mass rotating stellar models presented in the past years by the Geneva Stellar Evolution Group can be used to build synthetic stellar populations that fully account for the effects of stellar rotation.
Granada, Anahí, Haemmerlé, Lionel
core   +1 more source