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

  • Conservative, density-based smoothed particle hydrodynamics with improved partition of the unity and better estimation of gradients 

    García Senz, Domingo; Cabezón Gómez, Rubén Martín; Escartín, José Antonio (EDP Sciences, 2022-03-01)
    Article
    Open Access
    Context. The accurate evaluation of gradients is a cornerstone of the smoothed particle hydrodynamics (SPH) technique. Using an integral approach to estimating gradients has been proven to substantially enhance its accuracy, ...
  • Axisymmetric magneto-hydrodynamics with SPH 

    García Senz, Domingo (2022)
    Conference lecture
    Open Access
    Many interesting terrestrial and astrophysical scenarios involving magnetic fields can be approached in axial geometry. Even though the Lagrangian smoothed particle hydrodynamics (SPH) technique has been successfully ...
  • 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)
    Conference lecture
    Open Access
    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 ...
  • 3D Hydrodynamical simulations of helium-ignited double-degenerate white dwarf mergers 

    Roy, Niranjan C.; Tiwari, Vishal; Bobrick, Alexey; Kosakowski, Daniel; Fisher, Robert; Perets, Hagai B.; Kashyap, Rahul; Lorén Aguilar, Pablo; García-Berro Montilla, Enrique (2022-06-01)
    Article
    Open Access
    The origins of Type Ia supernovae (SNe Ia) are still debated. Some of the leading scenarios involve a double detonation in double white dwarf (WD) systems. In these scenarios, helium shell detonation occurs on top of a ...
  • Constraining the 30P(p,¿¿)31S Reaction Rate in ONe Novae via the Weak, Low-Energy, ß-Delayed Proton Decay of 31Cl 

    Budner, Tamas; Friedman, Matt; Wrede, Christopher; Brown, B. Alex; José Pont, Jordi; Perez Loureiro, David; Sun, Lijie; Surbrook, Jason; Ayyad, Yassid; Bardayan, D. W.; Chae, Kyungyuk; Chen, Alan A.; Chipps, Kelly A.; Cortesi, Marco; Glassman, Brent; Hall, Matthew R.; Janasik, Mark; Liang, Jing; O'Malley, Patrick; Pollacco, E.; Psaltis, Athanasios; Stomps, Jordan; Wheeler, Tyler (American Institute of Physics (AIP), 2022-05-06)
    Article
    Open Access
    The 30P(p,¿)31S reaction plays an important role in understanding the nucleosynthesis of A=30 nuclides in oxygen-neon novae. The Gaseous Detector with Germanium Tagging was used to measure 31Cl ß-delayed proton decay through ...
  • A moderately-sized nuclear network to assist multi-D hydrodynamic simulations of supernova explosions 

    Sanz, Axel; Cabezón Gómez, Rubén Martín; García Senz, Domingo (2022)
    Article
    Open Access
    A key ingredient in any numerical study of supernova explosions is the nuclear network routine that is coupled with the hydrodynamic simulation code. When these studies are performed in more than one dimension, the size ...
  • 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
    Open Access
    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 ...

View more