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Ara es mostren els items 44-63 de 81

    • Simulación de Monte Carlo de la población de enanas blancas de la galaxia 

      Torres Gil, Santiago (Universitat Politècnica de Catalunya, 2002-07-10)
      Tesi
      Accés obert
      El estudio de las propiedades de la población de enanas blancas de la Galaxia es muy amplio, e implica aportaciones en diferentes campos de la astrofísica, tales como evolución estelar, dinámica galáctica, ...

    • Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the virtual observatory 

      Jiménez Esteban, F. M.; Torres Gil, Santiago; Rebassa Mansergas, Alberto; Cruz Gamba, Patricia; Murillo Ojeda, Raquel; Solano Márquez, Enrique; Rodrigo Blanco, Carlos; Camisassa, María Eugenia (Oxford University Press, 2023-02-01)
      Article
      Accés obert
      The third data release of Gaia has provided low resolution spectra for 100 000 white dwarfs (WDs) that, together with the excellent photometry and astrometry, represent an unrivalled benchmark for the study of this ...

    • Structure and evolution of ultra-massive white dwarfs in general relativity 

      Althaus, Leandro G.; Camisassa, María Eugenia; Torres Gil, Santiago; Battich, Tiara; Córsico, Alejandro H.; Rebassa Mansergas, Alberto; Raddi, Roberto (EDP Sciences, 2022-12-01)
      Article
      Accés obert
      Ultra-massive white dwarfs (M? & 1.05M ) are of utmost importance in view of the role they play in type Ia supernovae explosions, merger events, the existence of high magnetic field white dwarfs, and the physical processes ...

    • TECNOLOGIES D'INFORMACIÓ QUÀNTICA (Examen final, 1r quadrimestre) 

      Torres Gil, Santiago (Universitat Politècnica de Catalunya, 2023-01-19)
      Examen
      Accés restringit per decisió de l'autor

    • The contribution of oxygen-neon white dwarfs to the MACHO content of the Galactic halo 

      Camacho Díaz, Judit; Torres Gil, Santiago; Isern Vilaboy, Jordi; Althaus, Leandro Gabriel; García-Berro Montilla, Enrique (2007-06-13)
      Article
      Accés obert
      Context. The interpretation of microlensing results towards the Large Magellanic Cloud (LMC) still remains controversial. White dwarfs have been proposed to explain these results and, hence, to contribute significantly ...

    • The contribution of red dwarfs and white dwarfs to the halo dark matter 

      Torres Gil, Santiago; Camacho Díaz, Judit; Isern Vilaboy, Jordi; García-Berro Montilla, Enrique (2008)
      Article
      Accés obert

    • The difficulty of finding double-degenerate progenitors of type Ia supernovae 

      Rebassa Mansergas, Alberto; Toonen, S.; Korol, V.; Torres Gil, Santiago (2018)
      Text en actes de congrés
      Accés obert
      The double-degenerate progenitors of type Ia su- pernovae (SNIa) are double white dwarf binaries with a totalmass near the Chandrasekhar limit and with merger timescales smaller than the Hubble time. The fact that we ...

    • The effects of metallicity on the Galactic disk population of white dwarfs 

      Cojocaru, Elena Ruxandra; Torres Gil, Santiago; Isern Vilaboy, Jordi; García-Berro Montilla, Enrique (2014-06)
      Article
      Accés obert
      Context. It has been known for a long time that stellar metallicity plays a significant role in the determination of the ages of the different Galactic stellar populations, when main sequence evolutionary tracks are employed. ...

    • The effects of the Observational Selection Criteria on the post common envelope white dwarf-main sequence binary population 

      Camacho Díaz, Judit; Torres Gil, Santiago; García-Berro Montilla, Enrique; Zorotovic, Mónica; Schreiber, Mathias R.; Rebassa Mansergas, Alberto (American Institute of Physics (AIP), 2010)
      Comunicació de congrés
      Accés obert
      We present a detailed Monte Carlo simulator of the Galactic population of binary stars. Preliminary results are presented for the white dwarf-main sequence (WD+MS) binary population resulting from a common envelope (CE) ...

    • The effects of unresolved double degenerates in the white dwarf luminosity function 

      Rebassa Mansergas, Alberto; Torres Gil, Santiago (Oxford University Press, 2020-02-01)
      Article
      Accés restringit per política de l'editorial
      We perform an analysis of the single white dwarf and the double degenerate binary populations in the solar neighbourhood following a population synthesis approach to investigate the effects of unresolved double degenerates ...

    • The evolution of white dwarfs resulting from helium-enhanced, low-metallicity progenitor stars 

      Althaus, Leandro G.; de Geronimo, Francisco; Córsico, Alejandro H.; Torres Gil, Santiago; García-Berro Montilla, Enrique (EDP Sciences, 2017-01-01)
      Article
      Accés obert
      Context. Some globular clusters host multiple stellar populations with different chemical abundance patterns. This is particularly true for ¿ Centauri, which shows clear evidence of a helium-enriched subpopulation characterized ...

    • The formation of ultra-massive carbon-oxygen core white dwarfs and their evolutionary and pulsational properties 

      Althaus, Leandro G.; Gil Pons, Pilar; Córsico, Alejandro H.; Camisassa, María Eugenia; Miller Bertolami, Marcelo M; de Geronimo, Francisco; Torres Gil, Santiago; Gutiérrez Cabello, Jordi; Rebassa Mansergas, Alberto (EDP Sciences, 2021-02)
      Article
      Accés obert
      The existence of ultra-massive white dwarf stars, MWD & 1.05M , has been reported in several studies. These white dwarfs are relevant for the role they play in type Ia Supernova explosions, the occurrence of physical ...

    • The Gaia white dwarf population within 100 pc of the Sun 

      Torres Gil, Santiago; Rebassa Mansergas, Alberto; Jiménez Esteban, F. M.; Cantero, C.; Canals, Pere; Skorobogatov, G.; Solano, E (2018)
      Text en actes de congrés
      Accés obert
      The recent Gaia Data Release 2 has provided an unprecedented sample of the local white dwarf population. The high astrometric resolution and the photometry provided by Gaia allows to build a clean magnitude-color diagram ...

    • The kinematics of the white dwarf population from the SDSS DR12 

      Anguiano, B.; Rebassa Mansergas, Alberto; Torres Gil, Santiago; García-Berro Montilla, Enrique; Freeman, K. C. (2017)
      Text en actes de congrés
      Accés obert
      We use the Sloan Digital Sky Survey Data Release 12, which is the largest avail-able white dwarf catalog to date, to study the evolution of the kinematical properties of thepopulation of white dwarfs in the Galactic disc. ...

    • The kinematics of the white dwarf population from the SDSS DR12 

      Anguiano, B.; Rebassa Mansergas, Alberto; García-Berro Montilla, Enrique; Torres Gil, Santiago; Freeman, K. C.; Zwitter, T. (2017-08-01)
      Article
      Accés obert
      We use the Sloan Digital Sky Survey Data Release 12, which is the largest available white dwarf catalogue to date, to study the evolution of the kinematical properties of the population of white dwarfs in the Galactic disc. ...

    • The kinematics of white dwarfs from the SDSS DR12 

      García-Berro Montilla, Enrique; Skorobogatov, G.; Torres Gil, Santiago; Anguiano, B.; Rebassa Mansergas, Alberto (2018)
      Text en actes de congrés
      Accés obert
      We use the Sloan Digital Sky Survey Data Release 12, which is the largest availablewhite dwarf catalogue to date, to study the evolution of the kinematical properties of the pop-ulation of white dwarfs of the Galactic disk. ...

    • The population of single and binary white dwarfs of the Galactic bulge 

      Torres Gil, Santiago; García-Berro Montilla, Enrique; Cojocaru, Elena Ruxandra; Calamida, Annalisa (Oxford University Press, 2018-05-01)
      Article
      Accés obert
      Recent Hubble Space Telescope observations have unveiled the white dwarf cooling sequence of the Galactic bulge. Although the degenerate sequence can be well fitted employing the most up-to-date theoretical cooling sequences, ...

    • The population of white dwarf-main sequence binaries in the SDSS DR 12 

      Cojocaru, Elena Ruxandra; Rebassa Mansergas, Alberto; Torres Gil, Santiago; García-Berro Montilla, Enrique (2017-09-11)
      Article
      Accés obert
      We present a Monte Carlo population synthesis study of white dwarf-main sequence (WD+MS) binaries in the Galactic disc aimed at reproducing the ensemble properties of the entire population observed by the Sloan Digital Sky ...

    • The pulsational properties of ultra-massive DB white dwarfs with carbon-oxygen cores coming from single-star evolution 

      Córsico, Alejandro H.; Gil Pons, Pilar; Torres Gil, Santiago; Althaus, Leandro G. (EDP Sciences, 2021-02)
      Article
      Accés obert
      Ultra-massive white dwarfs are relevant for many reasons: their role as type Ia supernova progenitors, the occurrence of physical processes in the asymptotic giant branch phase, the existence of high-field magnetic white ...

    • The star formation history of Gaia white dwarf population through its colour-magnitude diagram 

      Marzoa Domínguez, Antonio; Torres Gil, Santiago; Rebassa Mansergas, Alberto (Sociedad Española de Astronomía (SEA), 2022)
      Comunicació de congrés
      Accés obert
      White dwarfs are the most common stellar remnants. Furthermore, as being old objects, their study could shed new light on different questions related to the history, formation and evolution of the Galaxy. Despite these ...