Maurizio Salaris

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We present a large and updated stellar evolution database for low-, intermediate-and high-mass stars in a wide metallicity range, suitable for studying Galactic and extragalactic simple and composite stellar populations using population synthesis techniques. The stellar mass range is between ∼ 0.5M ⊙ and 10M ⊙ with a fine mass spacing. The metallicity(More)
Hipparcos parallax measurements of stars in the Pleiades notoriously result in a cluster distance of 118 pc, which is approximately 10% shorter than the 'classical' result obtained from earlier main sequence (MS) fitting studies. In an earlier paper we developed a purely empirical MS-fitting method in an attempt to address this problem. This work produced(More)
This paper is the 4th in a series describing the latest additions to the BaSTI stellar evolution database, which consists of a large set of homogeneous models and tools for population synthesis studies, covering ages between 30 Myr and ∼20 Gyr and 11 values of Z (total metallicity). Here we present a new set of low and high resolution synthetic spectra(More)
In the old, populous, and metal-rich open cluster NGC 6791 we have used deep HST/ACS images to track the white dwarf cooling sequence down to m F606W ≃ 28.5. The white dwarf luminosity function shows a well defined peak at m F606W ≃ 27.4, and a bending to the blue in the color–magnitude diagram. If this peak corresponds to the end of the white dwarf cooling(More)
White dwarfs are the remnants of stars of low and intermediate masses on the main sequence. Since they have exhausted all their nuclear fuel, their evolution is just a gravothermal process. The release of energy only depends on the detailed internal structure and chemical composition and on the properties of the envelope equation of state and opacity; its(More)
The evolution of white dwarfs is essentially a cooling process that depends primarily on the energy stored in their degenerate cores and on the transparency of their envelopes. In this paper we compute accurate cooling sequences for carbon–oxygen white dwarfs with hydrogen dominated atmospheres for the full range of masses of interest. For this purpose we(More)
We present a large, new set of stellar evolution models and isochrones for an α-enhanced metal distribution typical of Galactic halo and bulge stars; it represents a homogeneous extension of our stellar model library for a scaled-solar metal distribution already presented in Pietrinferni et al. (2004). The effect of the α−element enhancement has been(More)
We introduce and discuss the properties of a theoretical (B−K)-(J −K) integrated colour diagram for single-age, single-metallicity stellar populations. We show how this combination of integrated colours is able to largely disentangle the well known age-metallicity degeneracy when the age of the population is greater than ∼ 300 Myr, and thus provides(More)
The theoretical evaluations of the Red Giant Branch Tip (TRGB) luminosity presented in Salaris & Cassisi (1997) are extended to higher metallicities, and compared with analogous independent results recently published. The present sets of stellar models agree quite well in the determination of the TRGB brightness. Relations between TRGB bolometric and I(More)