Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Carlos Abia"'
Autor:
Rafael Guerço, Verne V Smith, Katia Cunha, Sylvia Ekström, Carlos Abia, Bertrand Plez, Georges Meynet, Solange V Ramirez, Nikos Prantzos, Kris Sellgren, Cristian R Hayes, Steven R Majewski
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 516:2801-2811
The center of the Milky Way contains stellar populations spanning a range in age and metallicity, with a recent star formation burst producing young and massive stars. Chemical abundances in the most luminous stellar member of the Nuclear Star Cluste
Autor:
Nikos Prantzos, Carlos Abia, Tianxiang Chen, Patrick de Laverny, Alejandra Recio-Blanco, E Athanassoula, Lorenzo Roberti, Diego Vescovi, Marco Limongi, Alessandro Chieffi, Sergio Cristallo
Support from the Centre National d’Etudes Spatiales (CNES), France. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1bf09487c7999c0e21b6550afaaf3fa
https://hdl.handle.net/10481/83031
https://hdl.handle.net/10481/83031
Publikováno v:
The European Physical Journal A. 59
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 discrepancy between the theoretical expectation and its observati
Autor:
A. Asensio Ramos, Nikos Prantzos, Carlos Abia, P. de Laverny, Alejandra Recio-Blanco, S. A. Korotin
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 648, pp.A107. ⟨10.1051/0004-6361/202040250⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 648, pp.A107. ⟨10.1051/0004-6361/202040250⟩
A Rb deficiency by a factor two with respect to the Sun has been found in M dwarfs of solar metallicity. This deficiency is difficult to understand from both the observational and nucleosynthesis point of views. To test the reliability of this Rb def
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e91ed44dd28b4e2a7bc5892c841df7c3
Autor:
A. Kaminski, S. V. Jeffers, M. Lafarga, Mathias Zechmeister, C. Rodríguez López, Th. Henning, Carlos Abia, A. Lopez-Gallifa, Andreas Quirrenbach, S. A. Korotin, V. M. Passegger, Andreas Schweitzer, Emilio Marfil, Juan Carlos Morales, Nikos Prantzos, Ansgar Reiners, Stefan Dreizler, Víctor J. S. Béjar, Evangelos Nagel, Hugo M. Tabernero, P. J. Amado, J. A. Caballero, D. Montes, O. Straniero, Martin Kürster, S. Pedraz, Ignasi Ribas, M. Cortés-Contreras
Publikováno v:
DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
instname
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Digital.CSIC. Repositorio Institucional del CSIC
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
E-Prints Complutense. Archivo Institucional de la UCM
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 642, pp.A227. ⟨10.1051/0004-6361/202039032⟩
Instituto Nacional de Técnica Aeroespacial (INTA)
instname
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Digital.CSIC. Repositorio Institucional del CSIC
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
E-Prints Complutense. Archivo Institucional de la UCM
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 642, pp.A227. ⟨10.1051/0004-6361/202039032⟩
Instituto Nacional de Técnica Aeroespacial (INTA)
Due to their ubiquity and very long main-sequence lifetimes, abundance determinations in M dwarfs provide a powerful and alternative tool to GK dwarfs to study the formation and chemical enrichment history of our Galaxy. In this study, abundances of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3080891154c53f065b265640d455312e
https://hdl.handle.net/20.500.12666/231
https://hdl.handle.net/20.500.12666/231
We find that the combined LF of N- and SC-type stars are consistent with a Gaussian distribution peaking at M_bol~ -5.2 mag. The resulting LF however shows two tails at lower and higher luminosities more extended than those previously found, indicati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93466e0b8865fe66ffda3999e811bac4
http://hdl.handle.net/20.500.12386/31188
http://hdl.handle.net/20.500.12386/31188
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 491, pp.1832-1850
Digibug. Repositorio Institucional de la Universidad de Granada
instname
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 491, pp.1832-1850
Digibug. Repositorio Institucional de la Universidad de Granada
instname
The decomposition of the Solar system abundances of heavy isotopes into their s- and r- components plays a key role in our understanding of the corresponding nuclear processes and the physics and evolution of their astrophysical sites. We present a n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81fbfef13dbd3a743abe8e6b696cc157
https://hal.parisnanterre.fr/hal-02401070
https://hal.parisnanterre.fr/hal-02401070
Publikováno v:
EPJ Web of Conferences. 260:11009
Asymptotic giant branch (AGB) stars are thought to be among the most important sources of fluorine in our Galaxy. While observations and theory agree at close-to-solar metallicity, stellar models overestimate fluorine production in comparison to heav
Publikováno v:
Digibug. Repositorio Institucional de la Universidad de Granada
instname
instname
DV and SC acknowledge S. Bagnulo for fruitful discussions. DV acknowledges financial support from the German-Israeli Foundation (GIF No. I-1500-303.7/2019). CA acknowledges financial support from the Agencia Estatal de Investigacion of the Spanish Mi
Publikováno v:
Digibug. Repositorio Institucional de la Universidad de Granada
instname
instname
We present new fluorine abundance measurements for a sample of carbon-rich asymptotic giant branch (AGB) stars and two other metal-poor evolved stars of Ba/CH types. The abundances are derived from IR, K-band, high-resolution spectra obtained using G
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c2449df3c2da77729b9ae93b2199792