El Grup d' Astronomía i Astrofísica de la Universitat Politècnica de Catalunya (UPC) reuneix a un nombre reduit de persones interessades en una àmplia gama de temes de la Astronomía moderna. La història del grup va començar l'any 1995, just desprès de que alguns astrofísics perteneixents a dos departaments de física diferents (el departament de Física Aplicada, i el de Física i Enginyería Nuclear.) ajuntaran esforços per tal de crear un grup d'investigació competitiu en ciències de l'espai dins de la UPC. En la actualitat el GAA compta amb 7 investigadors permanents, a més de 6 estudiants doctorats i 11 estudiants postgraduats buscant aconseguir el seu doctorat. L'àrea principal d'actividad de la investigació del GAA pot ser classificada com Astrofísica Teórica. El tema és molt ampli, incloent-hi simulacions de computadora de les últimes etapes de la evolució estelar (l'enfriamient de les nanes blanques, AGBs, explosions de novas i supernovas, explosions de raigs X i física dels objectes compactes), estructura y dinàmica dels jets relacionats amb el PN i els objectes de l'Herbig-Haro i Cosmología. Alguns membres també estàn interessats en altres areas, incloent-hi estudis del comportament cinemàtic de estrelles en la vecindad Solar així com el diseny de la instrumentació que serà utilitzada per els satèlits científics.

Pàgina web del grup de recerca

Recent Submissions

  • Hydrogen burning of 29Si and its impact on presolar stardust grains from classical novae 

    Downen, Lori N.; Iliadis, Christian; Champagne, Art; Clegg, Thomas; Coc, Alain; José Pont, Jordi (Institute of Physics (IOP), 2022-04-01)
    Article
    Open Access
    Presolar stardust grains found in primitive meteorites are believed to retain the isotopic composition of stellar outflows at the time of grain condensation. Therefore, laboratory measurements of their isotopic ratios ...
  • 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
    Open Access
    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 ...
  • Nova LMC 2009a as observed with XMM–Newton, compared with other novae 

    Oriol Ibarz, Marina; Dobrotka, Andrej; Ospina, Nathalie; Ippei, Shake; Sala Cladellas, Glòria (Oxford University Press, 2021-05-21)
    Article
    Open Access
    <jats:title>ABSTRACT</jats:title> <jats:p>We examine four high-resolution reflection grating spectrometers (RGS) spectra of the February 2009 outburst of the luminous recurrent nova LMC 2009a. They were ...
  • Infrared excesses around bright white dwarfs from Gaia and unWISE. II 

    Lai, Samuel; Dennihy, Erik; Xu, Siyi; Nitta, Atsuko; Kleinman, Scot J.; Leggett, Sandy; Bonsor, Amy; Hodgkin, Simon; Rebassa Mansergas, Alberto; Rogers, L. K. (Institute of Physics (IOP), 2021-10-20)
    Article
    Open Access
    Infrared excesses around white dwarf stars indicate the presence of various astrophysical objects of interest, including companions and debris disks. In this second paper of a series, we present follow-up observations ...
  • White dwarf-main-sequence binaries from Gaia EDR3: The unresolved 100 pc volume-limited sample 

    Rebassa Mansergas, Alberto; Solano Márquez, Enrique; Jiménez Esteban, F. M.; Torres Gil, Santiago; Rodrigo Blanco, Carlos; Ferrer i Burjachs, Aina; Calcaferro, Leila M.; Althaus, Leandro G.; Córsico, Alejandro H. (Oxford University Press, 2021-10-01)
    Article
    Restricted access - publisher's policy
    We use the data provided by the Gaia Early Data Release 3 to search for a highly-complete volume-limited sample of unresolved binaries consisting of a white dwarf and a main sequence companion (i.e. WDMS binaries) within ...
  • The White Dwarf Binary Pathways Survey - IV. Three close white dwarf binaries with G-type secondary stars 

    Schreiber, Mathias R.; Raddi, Roberto; Parsons, S. G.; Gänsicke, Boris T.; Toloza, Odette; Zorotovic, Mónica; Irawati, Puji; Rebassa Mansergas, Alberto; Ren, J. J.; Tappert, C. (Oxford University Press, 2021-02-01)
    Article
    Open Access
    Constraints from surveys of post common envelope binaries (PCEBs) consisting of a white dwarf plus an M-dwarf companion have led to significant progress in our understanding of the formation of close white dwarf binary ...
  • 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
    Open Access
    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 ...
  • Forever young white dwarfs: When stellar ageing stops 

    Camisassa, María Eugenia; Althaus, Leandro G.; Torres Gil, Santiago; Córsico, Alejandro H.; Rebassa Mansergas, Alberto; Tremblay, P. E.; Cheng, Sihao; Raddi, Roberto (EDP Sciences, 2021-05-01)
    Article
    Open Access
    White dwarf stars are the most common end point of stellar evolution. The ultramassive white dwarfs are of special interest as they are related to type Ia supernovae explosions, merger events, and fast radio bursts. ...
  • Uncertainties in the 18F(p, a)15O reaction rate in classical novae 

    Kahl, D.; José Pont, Jordi; Woods, Phil J. (EDP Sciences, 2021-09-01)
    Article
    Restricted access - publisher's policy
    Context. Direct observation of ¿-ray emission from the decay of 18F ejected in classical nova outbursts remains a major focus of the nuclear astrophysics community. However, modeling the abundance of ejected 18F, and thus ...
  • New constraints on the Al 25 (p,¿) reaction and its influence on the flux of cosmic ¿ rays from classical nova explosions 

    José Pont, Jordi (American Physical Society, 2021-08-16)
    Nautical chart
    Open Access
    The astrophysical 25Al(p,¿)26Si reaction represents one of the key remaining uncertainties in accurately modeling the abundance of radiogenic 26Al ejected from classical novae. Specifically, the strengths of key proton-unbound ...
  • Level structure of the Tz=-1 nucleus Ar 34 and its relevance for nucleosynthesis in ONe novae 

    José Pont, Jordi (American Physical Society, 2021-03-08)
    Article
    Open Access
    The 24Mg+12C fusion reaction was used to perform a detailed ¿-ray spectroscopy study of the astrophysically important nucleus 34Ar. In particular, an experimental setup, coupling the advanced ¿-ray tracking array GRETINA ...
  • Enquesta sobre la situació del col·lectiu del professorat associat a la Universitat Politècnica de Catalunya 

    Cornadó Bardón, Còssima; Haurie Ibarra, Laia; Mir Teixidor, Enrique; Morros Rubió, Josep Ramon; Mujica Delgado, Luis Eduardo; Olmedo Torre, Noelia; Peña Carrera, Marta; Sala Cladellas, Glòria (2021-03-15)
    Research report
    Open Access
    La utilització de la figura del professorat associat per part de les universitats públiques a Catalunya en molts casos està lluny de l’esperit d’aquesta figura en la legislació (especialista de reconeguda competència i amb ...

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