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Evolutionary sequences of stellar models with new radiative opacities. VI.

Research and Technology (MURST) and the Italian Space Agency (ASI). L. Girardi acknowledges a fellowship from Brazilian funding agency CNPq. A. Appendix: The interior EOS In a dense plasma the EOS deviates

Combined photometric and asteroseismic constraints on the properties of NGC 6791

. Hekker , S. Mathur , R.A. García , T.R. Bedding , H. Kjeldsen et al., ApJ 737 , L10 ( 2011 ) [5] A. Bressan , P. Marigo , L. Girardi , B. Salasnich , C. Dal Cero , S. Rubele , A. Nanni , MNRAS 427 , 127

Galactic archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE

A&A Astronomy & Astrophysics F. Anders C. Chiappini T. S. Rodrigues A. Miglio J. Montalbán B. Mosser L. Girardi M. Valentini A. Noels T. Morel J. A. Johnson M. Schultheis F. Baudin R. de Assis

Models of red giants in the CoRoT asteroseismology fields combining asteroseismic and spectroscopic constraints

All Sky Catalog of point sources da Silva , L. , Girardi , L. , Pasquini , L. , et al. 2006 , A &A, 458 , 609 Deheuvels, S. , García , R. A. , Chaplin , W. J. , et al. 2012 , ApJ, 756 , 19 Deheuvels, S

GALEX catalogs of UV sources: statistical properties and sample science applications: hot white dwarfs in the Milky Way

, Brazil 1 L. Girardi INAF-Padua Observatory, Padua, Italy 2 P. Marigo Department of Astronomy, Padua University , Padua, Italy We describe the content and properties of UV source catalogs from GALEX's All

A near-infrared study of AGB and red giant stars in the Leo I dSph galaxy

A near-infrared imaging study of the evolved stellar populations in the dwarf spheroidal galaxy Leo I is presented. Based on JHK observations obtained with the WFCAM wide-field array at the United Kingdom Infrared Telescope, we build a near-infrared photometric catalogue of red giant branch (RGB) and asymptotic giant branch (AGB) stars in Leo I over a 13.5 arcmin2 area. The V−K...

The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits - I. Sample definition and characterization

. 1009203. da Silva, L., Girardi, L., Pasquini, L., et al. 2006, A&A, 458, 609 da Silva, L., Torres, C. A. O., de La Reza, R., et al. 2009, A&A, 508, 833 Dall, T. H., Foellmi, C., Pritchard, J., et al. 2007

On the effect of helium enhancement on bolometric corrections and Teff-colour relations

We evaluate the effects that variations in He content have on bolometric corrections and Teff-colour relations. To do this, we computed ATLAS9 model atmospheres and spectral energy distributions for effective temperatures ranging from 3500 K to 40 000 K for dwarfs and from 3500 K to 8000 K for giants, considering both “He-non-enhanced” and “He-enhanced” compositions. The...

The evolved stars of Leo II dSph galaxy from near-infrared UKIRT/WFCAM observations

We present a study of the evolved stellar populations in the dwarf spheroidal galaxy Leo II, based on JHKs observations obtained with the near-infrared array WFCAM at the UKIRT telescope. Combining the new data with optical data, we derived photometric estimates of the distribution of global metallicity [M/H] of individual red giant stars from their V−Ks colours. Our results are...

The VMC survey - III. Mass-loss rates and luminosities of LMC AGB stars

. C. Chiosi, & A. Renzini , Astrophys. Space Sci. Lib ., 122 , 195 Renzini , A. , & Voli , M. 1981 , A &A, 94 , 175 Rubele , S. , Kerber , L. , Girardi , L. , et al. 2012 , A &A, 537 , A106 Sargent , B

The VMC survey - IV. The LMC star formation history and disk geometry from four VMC tiles

We derive the star formation history (SFH) for several regions of the Large Magellanic Cloud (LMC), using deep near-infrared data from the VISTA near-infrared YJKs survey of the Magellanic system (VMC). The regions include three almost-complete 1.4 deg2 tiles located  ~3.5° away from the LMC centre in distinct directions. They are split into 21.0′ × 21.5′ (0.12 deg2) subregions...

Extended star formation history of the star cluster NGC 2154 in the Large Magellanic Cloud

L. Girardi 4 0 Departamento de Astronoma, Universidad de Chile , Casilla 36-D, Santiago, Chile 1 Andes Prize Fellow, Universidad de Chile and Yale University 2 Dipartimento di Astronomia, Universita

Does the mixing length parameter depend on metallicity? - Further tests of evolutionary sequences using homogeneous databases

This paper is a further step in the investigation of the morphology of the color-magnitude diagram of Galactic globular clusters, and the fine-tuning of theoretical models, made possible by the recent observational efforts to build homogeneous photometric databases. In particular, we examine here the calibration of the morphological parameter WHB vs. metallicity, originally...

Evolution of planetary nebulae - I. An improved synthetic model

We present a new synthetic model to follow the evolution of a planetary nebula (PN) and its central star, starting from the onset of AGB phase up to the white dwarf cooling sequence. The model suitably combines various analytical prescriptions to account for different (but inter-related) aspects of planetary nebulae, such as: the dynamical evolution of the primary shell and...

Zero-metallicity stars - I. Evolution at constant mass

We present extensive evolutionary models of stars with initial zero-metallicity, covering a large range of initial masses (i.e. ). Calculations are carried out at constant mass, with updated input physics, and applying an overshooting scheme to convective boundaries. The nuclear network includes all the important reactions of the p-p chain, CNO-cycle and α-captures, and is solved...

Evolutionary sequences of stellar models with new radiative opacities. VI.

Research and Technology (MURST) and the Italian Space Agency (ASI). L. Girardi acknowledges a fellowship from Brazilian funding agency CNPq. A. Appendix: The interior EOS In a dense plasma the EOS deviates