Now showing items 1-20 of 58

    • A population synthesis study of the luminosity function of hot white dwarfs 

      Torres Gil, Santiago; García-Berro Montilla, Enrique; Krzesinski, Jurek; Kleinman, Scot J. (2014-03-05)
      Article
      Open Access
      Context. We present a coherent and detailed Monte Carlo simulation of the population of hot white dwarfs. We assess the statistical significance of the hot end of the white dwarf luminosity function and the role played by ...
    • A population synthesis study of the MS+WD population in the SDSS 

      García-Berro Montilla, Enrique; Torres Gil, Santiago; Camacho Díaz, Judit; Rebassa Mansergas, Alberto; Gänsicke, Boris T.; Schreiber, Mathias R.; Zorotovic, Mónica (2014)
      Conference lecture
      Restricted access - publisher's policy
    • A population synthesis study of the MS+WD population in the SDSS 

      García-Berro Montilla, Enrique; Torres Gil, Santiago; Camacho Díaz, Judit; Rebassa Mansergas, Alberto; Gänsicke, Boris T.; Schreiber, Mathias R.; Zorotovic, Mónica (Astronomical Society of the Pacific Conference Series (ASP), 2015-06-01)
      Article
      Open Access
      Detached white dwarf + main sequence (WD+MS) systems represent the simplest population of post-common envelope binaries (PCEBs), and their ensemble properties carry important information about common-envelope phase. However, ...
    • A population synthesis study of white dwarf-main sequence binaries in the galactic disk 

      Rebassa Mansergas, Alberto; García-Berro Montilla, Enrique; Torres Gil, Santiago (2017)
      Conference report
      Open Access
      The companion mass ratio distribution (CMRD) of main sequence binaries is a crucial physical quantity for understanding the evolution of stars in binary systems and for constraining models of binary star formation. However, ...
    • A white dwarf catalogue from Gaia-DR2 and the Virtual Observatory 

      Jiménez Esteban, F. M.; Torres Gil, Santiago; Rebassa Mansergas, Alberto; Skorobogatov, G.; Cantero, C. (Oxford University Press, 2018-01-01)
      Article
      Open Access
      We present a catalogue of 73¿221 white dwarf candidates extracted from the astrometric and photometric data of the recently published Gaia-DR2 catalogue. White dwarfs were selected from the Gaia Hertzsprung–Russell diagram ...
    • Accurate mass and radius determinations of a cool subdwarf in an eclipsing binary 

      Rebassa Mansergas, Alberto; Parsons, Steven G.; Dhillon, Vikram S.; Ren, Juanjuan; Littlefair, Stuart P.; Marsh, Thomas R.; Torres Gil, Santiago (Springer Nature, 2019-04-08)
      Article
      Open Access
      Cool subdwarfs are metal-poor low-mass stars that formed during the early stages of the evolution of our Galaxy. Because they are relatively rare in the vicinity of the Sun, we know of few cool subdwarfs in the solar ...
    • Axions and the luminosity function of white dwarfs : the thin and thick discs, and the halo 

      Isern Vilaboy, Jordi; García-Berro Montilla, Enrique; Torres Gil, Santiago; Cojocaru, Elena Ruxandra; Catalán, S (Oxford University Press, 2018-08-01)
      Article
      Open Access
      The evolution of white dwarfs is a simple gravothermal process of cooling. Since the shape of their luminosity function is sensitive to the characteristic cooling time, it is possible to use its slope to test the existence ...
    • Double degenerate mergers as progenitors of high-field magnetic white dwarfs 

      García-Berro Montilla, Enrique; Lorén Aguilar, Pablo; Aznar Siguan, Gabriela; Torres Gil, Santiago; Camacho Díaz, Judit; Althaus, Leandro Gabriel; Córsico, Alejando Hugo; Kulebi, Baybar; Isern Vilaboy, Jordi (2011-04-10)
      Article
      Open Access
      High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mech anism that produces the magnetic field are still unknown. ...
    • Effects of Ne-22 sedimentation and metallicity on the local 40 pc white dwarf luminosity function 

      Tononi García, Jordi; Torres Gil, Santiago; García-Berro Montilla, Enrique; Camisassa, María E.; Althaus, Leandro G.; Rebassa Mansergas, Alberto (EDP Sciences, 2019-08-06)
      Article
      Open Access
      We analyzed the effect of the sedimentation of 22Ne on the local white dwarf luminosity function by studying scenarios under different Galactic metallicity models. Methods. We use an advanced population synthesis code based ...
    • Examen Final 

      García-Berro Montilla, Enrique; Torres Gil, Santiago (Universitat Politècnica de Catalunya, 2013-06-05)
      Exam
      Restricted access to the UPC academic community
    • Examen Final 

      Torres Gil, Santiago; García-Berro Montilla, Enrique (Universitat Politècnica de Catalunya, 2015-06-03)
      Exam
      Restricted access to the UPC academic community
    • Examen Final 

      García-Berro Montilla, Enrique; Torres Gil, Santiago (Universitat Politècnica de Catalunya, 2014-06-23)
      Exam
      Restricted access to the UPC academic community
    • Explaining the Type Ia supernova PTF 11kx with a violent prompt merger scenario 

      García-Berro Montilla, Enrique; Torres Gil, Santiago; Camacho Díaz, Judit; Soker, Noam; Kashi, Amit (2013-05)
      Article
      Open Access
      We argue that the multiple shells of circumstellar material (CSM) and the supernovae (SNe) ejecta interaction with the CSM starting 59 d after the explosion of the Type Ia SN PTF 11kx are best described by a violent prompt ...
    • Factores subjetivos de la construcción sostenible. 

      Torres Gil, Santiago (2005-10-06T14:52:42Z)
      Article
      Open Access
      El concepte de sostenibilitat requereix del concepte de societat sostenible. Quan ens referim a la sostenibilitat d'un sistema, ens referim a la d'un sistema humà, amb els seus aspectes materials i culturals, i que ha ...
    • Gaia DR2 white dwarfs in the Hercules stream 

      Torres Gil, Santiago; Cantero, Carles; Camisassa, María E.; Antoja, T.; Rebassa Mansergas, Alberto; Althaus, Leandro G.; Thelemaque, Thomas; Canovas Cabrera, Héctor (EDP Sciences, 2019-09-01)
      Article
      Open Access
      We analyzed the velocity space of the thin- and thick-disk Gaia white dwarf population within 100 pc by searching for signatures of the Hercules stellar stream. We aimed to identify objects belonging to the Hercules stream, ...
    • High-proper-motion white dwarfs and halo dark matter 

      Torres Gil, Santiago; García-Berro Montilla, Enrique; Burkert, Andreas; Isern Vilaboy, Jordi (Blackwell, 2002-11)
      Article
      Open Access
      The interpretation of the old, cool white dwarfs recently found by Oppenheimer et al. is still controversial. Whereas these authors claim that they have finally found the elusive ancienthalo white dwarf population that ...
    • Infrared-excess white dwarfs in the Gaia 100 pc sample 

      Rebassa Mansergas, Alberto; Solano Márquez, Enrique; Xu, Siyi; Rodrigo Blanco, Carlos; Jiménez Esteban, F. M.; Torres Gil, Santiago (Oxford University Press, 2019-11)
      Article
      Open Access
      We analyse the 100¿pc Gaia white dwarf volume-limited sample by means of VOSA (Virtual Observatory SED Analyser) with the aim of identifying candidates for displaying infrared excesses. Our search focuses on the study of ...
    • Monte Carlo simulations of post-common-envelope white dwarf + main sequence binaries: The effects of including recombination energy 

      Zorotovic, Monica; García-Berro Montilla, Enrique; Schreiber, Mathias R.; Camacho Díaz, Judit; Torres Gil, Santiago; Rebassa Mansergas, Alberto; Gänsicke, Boris T. (2014-08-20)
      Article
      Open Access
      Context. Detached white dwarf + main sequence (WD+MS) post-common-envelope binaries (PCEBs) are perhaps the most suitable objects for testing predictions of close-compact binary-star evolution theories, in particular, ...
    • Monte Carlo simulations of post-common-envelope white dwarf plus main sequence binaries: comparison with the SDSS DR7 observed sample 

      Camacho Díaz, Judit; Torres Gil, Santiago; García-Berro Montilla, Enrique; Zorotovic, Monica; Schreiber, Mathias R.; Rebassa-Mansergas, Alberto; Nebot Gómez-Moran, Ada; Gänsicke, Boris T. (2014-06-01)
      Article
      Open Access
      Context. Detached white dwarf + main sequence (WD+MS) systems represent the simplest population of post-common envelope binaries (PCEBs). Since the ensemble properties of this population carries important information about ...
    • Monte Carlo simulations of the binary white dwarf population: a progress report 

      Camacho Díaz, Judit; Torres Gil, Santiago; García-Berro Montilla, Enrique (IOP PUBLISHING LTD, 2009)
      Conference lecture
      Open Access