468 citations · 2.2k across the 23 of their papers we have counts for
13 papers · 1 filter
Oxygen isotopic ratio in open cluster RGB stars: A new method for accurate mass and age estimations
O. Straniero, C. Abia, I. Domínguez +1
Determining precise and homogeneous absolute ages of open clusters (OCs) remains a challenge in stellar astrophysics, mainly due to parameter degeneracies in photometric methods an…
Tracing the s-Process: Spectroscopic Insights into Chemical Abundances in O- and C-rich Evolved Stars
Sophie Van Eck, Carlos Abia, Inma Dominguez
Oxygen and carbon-rich AGB stars - and objects directly polluted by them - are excellent laboratories to investigate the nucleosynthesis and mixing processes occurring during the l…
The carbon star mystery: forty years later
Oscar Straniero, Carlos Abia, Inmaculata Dominguez
In 1981 Icko Iben Jr published a paper entitled 'The carbon star mystery: why do the low mass ones become such, and where have all the high mass ones gone?', where he discussed the…
Chandrasekhar-mass white dwarfs are the progenitors of a small fraction of Type Ia supernovae according to nucleosythesis constraints
Eduardo Bravo, Luciano Piersanti, Stéphane Blondin +3
The precise progenitor system of type Ia supernovae (SNe Ia), whether it is a white dwarf (WD) close to the Chandrasekhar limit or substantially less massive, has been a matter of…
The RGB tip of galactic globular clusters and the revision of the bound of the axion-electron coupling
O. Straniero, C. Pallanca, E. Dalessandro +5
By combining Hubble Space Telescope (HST) and ground based optical and near-infrared photometric samples, we derive the RGB tip absolute magnitude of 22 galactic globular clusters…
The initial mass-final luminosity relation of type II supernova progenitors. Hints of new physics?
Oscar Straniero, Inma Dominguez, Luciano Piersanti +2
We revise the theoretical initial mass-final luminosity relation for progenitors of type IIP and IIL supernovae. The effects of the major uncertainties, as those due to the treatme…
On the mass of supernova progenitors: the role of the CC reaction
Oscar Straniero, Luciano Piersanti, Inmaculata Dominguez +1
A precise knowledge of the masses of supernova progenitors is essential to answer various questions of modern astrophysics, such as those related to the dynamical and chemical evol…
Axion-electron coupling from the RGB tip of Globular Clusters
Oscar Straniero, Inmaculata Dominguez, Maurizio Giannotti +1
We present a preliminary study of the Globular Cluster RGB devoted to improve the available constraint for the axion-electron coupling. By means of multi-band IR photometry of the…
Revisiting the bound on axion-photon coupling from Globular Clusters
Adrian Ayala, Inma Dominguez, Maurizio Giannotti +2
We derive a strong bound on the axion-photon coupling from the analysis of a sample of 39 Galactic Globular Clusters. As recognized long ago, the R parameter, i.e. the num…
Nitrogen isotopes in AGB carbon stars and presolar SiC grains: a challenge for stellar nucleosynthesis
R. Hedrosa, C. Abia, M. Busso +5
Isotopic ratios of C, N, Si, and trace heavy elements in presolar SiC grains from meteorites provide crucial constraints to nucleosynthesis. A long-debated issue is the origin of t…
Type Ia supernovae and the ^{12}C+^{12}C reaction rate
E. Bravo, L. Piersanti, I. Domínguez +3
The experimental determination of the cross-section of the ^{12}C+^{12}C reaction has never been made at astrophysically relevant energies (E<2 MeV). The profusion of resonances th…
Evolution, nucleosynthesis and yields of low mass AGB stars at different metallicities (II): the FRUITY database
Sergio Cristallo, Luciano Piersanti, Oscar Straniero +6
By using updated stellar low mass stars models, we can systematically investigate the nucleosynthesis processes occurring in AGB stars, when these objects experience recurrent ther…
Evolution, nucleosynthesis and yields of low mass AGB stars
S. Cristallo, O. Straniero, R. Gallino +3
The envelope of thermally pulsing AGB stars undergoing periodic third dredge-up episodes is enriched in both light and heavy elements, the ashes of a complex internal nucleosynthes…