A NEW GENERATION OF PARSEC-COLIBRI STELLAR ISOCHRONES INCLUDING THE TP-AGB PHASE

By P. Marigo, L. Girardi, A. Bressan, P. Rosenfield, B. Aringer, Yang Chen, Marco Dussin, A. Nanni, G. Pastorelli, T. Rodrigues and 6 more. 2017

682 citations recorded by the source corpus.

We introduce a new generation of PARSEC–COLIBRI stellar isochrones that includes a detailed treatment of the thermally pulsing asymptotic giant branch (TP-AGB) phase, covering a wide range of initial metallicities (0.0001 < Zi < 0.06). Compared to previous releases, the main novelties and improvements are use of new TP-AGB tracks and related atmosphere models and spectra for M and C-type stars; inclusion of the surface H+He+CNO abundances in the isochrone tables, accounting for the effects of diffusion, dredge-up episodes and hot-bottom burning; inclusion of complete thermal pulse cycles, with a complete description of the in-cycle changes in the stellar parameters; new pulsation models to describe the long-period variability in the fundamental and first-overtone modes; and new dust models that follow the growth of the grains during the AGB evolution, in combination with radiative transfer calculations for the reprocessing of the photospheric emission. Overall, these improvements are expected to lead to a more consistent and detailed description of properties of TP-AGB stars expected in resolved stellar populations, especially in regard to their mean photometric properties from optical to mid-infrared wavelengths. We illustrate the expected numbers of TP-AGB stars of different types in stellar populations covering a wide range of ages and initial metallicities, providing further details on the “C-star island” that appears at intermediate values of age and metallicity, and about the AGB-boosting effect that occurs at ages close to 1.6-Gyr for populations of all metallicities. The isochrones are available through a new dedicated web server.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/ec9b3daf7903c8437603778efb9a066db351ed6d

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In Astronomy and Astrophysics

Citations in the corpus

A stellar census in globular clusters with MUSE: multiple populations chemistry in NGC 2808 (2019, background): “Firstly, we find an isochrone (from Marigo et al. 2017) that best matches the HST photometry (F606W, F606W-F814W) from Sarajedini et al. (2007).”
The APOGEE-2 Survey of the Orion Star-forming Complex. II. Six-dimensional Structure (2018, methodology): “The various properties, such as Teff , log g, MG, MGB , MGR , and MH band luminosities, are interpolated from the PARSEC-COLIBRI isochrones in accordance with the previously assigned masses and ages (Marigo et al. 2017).”
Calibration of the Tip of the Red Giant Branch (2003, methodology): “For illustrative purposes, we use the PARSEC (Padova and Trieste Stellar Evolutionary Code:http://stev.oapd.inaf.it/cgi-bin/cmd) isochrones (CMD Version 3.3; Bressan et al. 2012; Marigo et al. 2017).”
The GALAH Survey: Second Data Release (2018, methodology): “Using PARSEC iscochrones (Marigo et al. 2017) it was shown in Sharma et al. (2018) that this transformation is reasonably accurate across the parameter space where the majority of GALAH stars fall.”