The impact of an updated ${}^{14}N(p,\gamma {)}^{15}O$ reaction rate on advanced evolutionary stages of low-mass stellar models

Abstract

We have investigated the impact of the ${}^{14}N(p,\gamma {)}^{15}O$ reaction rate recently redetermined by the LUNA experiment, on the shell H-burning and core He-burning phases of low-mass, metal poor stellar models. The new reaction rate has small but noticeable effects, the largest one being a $\sim$7-8\% reduction of the red giant branch lifetimes. To different degrees, the lifetimes and luminosities of horizontal branch models, the mass of the stellar models evolving within the RR Lyrae instability strip, the luminosity of the red giant branch luminosity function bump, the theoretical calibrations of the R-parameter and tip of the red giant branch luminosity are also affected. Predictions for the tip of the red giant branch luminosity, in particular, are in very good agreement with the currently available empirical constraints.

8 pages, accepted for publication in A&A

References in corpus (7)

• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• On using the CMD morphology of M67 to test solar abundances
• Primordial Helium And the Cosmic Background Radiation
• On the Delta V_HB_bump parameter in Globular Clusters
• The surface brightness profile of the remote cluster NGC 2419
• A Re-Evaluation of the Evolved Stars in the Globular Cluster M13
• The ACS LCID project IV: detection of the RGB bump in isolated galaxies of the Local Group

Cited by in corpus (14)

• The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
• The Pisa Stellar Evolution Data Base for low-mass stars
• The brightness of the Red Giant Branch tip: Theoretical framework, a set of reference models, and predicted observables
• Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
• Effects of Helium Enrichment in Globular Clusters I.Theoretical Plane with PGPUC stellar evolution code
• New PARSEC database of alpha-enhanced stellar evolutionary tracks and isochrones I. Calibration with 47 Tuc (NGC104) and the improvement on RGB bump
• NGC 2419: a large and extreme second generation in a currently undisturbed cluster
• On the magnitude difference between the main sequence turn off and the red giant branch bump in Galactic globular clusters
• Confronting uncertainties in stellar physics II. exploring differences in main-sequence stellar evolution tracks
• Investigating the Consistency of Stellar Evolution Models with Globular Cluster Observations via the Red Giant Branch Bump
• On the Color-Metallicity Relation of the Red Clump and the Reddening Toward the Magellanic Clouds
• From Theory to Observations and viceversa: theoretical uncertainties and observational constraints
• Uncertainties and systematics in stellar evolution models of Red Giant Stars
• Toward a Comprehensive Grid of Cepheid Models with MESA. III. Evolutionary and Pulsation Relations for Models with Core and Envelope Overshooting