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

Enviaments recents

  • NICER Observations of thermonuclear bursts from 4U 1728-34: detection of oscillations prior to the onset of two bursts 

    Bostanci, Funda; Boztepe, Tugba; Güver, Tolga; Strohmayer, Tod E.; Cavecchi, Yuri; Gögüs, Ersin; Altamirano, Diego; Bult, Peter; Chakrabarty, Deepto; Guillot, Sebastien; Jaisawal, Gaurava K.; Malacaria, Christian; Sanna, Andrea (Institute of Physics (IOP), 2023-11-13)
    Article
    Accés obert
    We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728-34 with NICER from 2017 June to 2019 September. In total, we detected ...
  • Main-sequence companions to white dwarfs - II. The age-activity-rotation relation from a sample of Gaia common proper motion pairs 

    Rebassa Mansergas, Alberto; Maldonado, Jesús; Raddi, Roberto; Torres Gil, Santiago; Hoskin, Matthew; Cunningham, Tim; Hollands, Mark; Ren, Juanjuan; Gänsicke, Boris T.; Tremblay, P. E.; Camisassa, María Eugenia (Oxford University Press, 2023-10-06)
    Article
    Accés obert
    Magnetic activity and rotation are related to the age of low-mass main-sequence stars. To further constrain these relations, we study a sample of 574 main-sequence stars members of common proper motion pairs with white ...
  • First measurement of the low-energy direct capture in Ne 20 (p,¿) Na 21 and improved energy and strength of the Ec.m.=368 keV resonance 

    Masha, Eliana; Barbieri, Lucia; Skowronski, Jakub; Aliotta, Marialuisa; Ananna, Chemseddine; Barile, Francesco; Bemmerer, Daniel; Best, Andreas; Boeltzig, Axel; Broggini, Carlo; Bruno, Carlo; Caciolli, Antonio; José Pont, Jordi (American Physical Society, 2023-11-22)
    Article
    Accés restringit per política de l'editorial
    The 20Ne(p,¿)21Na reaction is the slowest in the NeNa cycle and directly affects the abundances of the Ne and Na isotopes in a variety of astrophysical sites. Here we report the measurement of its direct capture contribution, ...
  • Confirmation of a new resonance in Si 26 and contribution of classical novae to the galactic abundance of Al 26 

    Canete, Laetitia; Doherty, Daniel; Lotay, Gavin; Seweryniak, Dariusz; Campbell, Chris; Carpenter, Michael Patten; Catford, Wilton; Chipps, Kelly A.; Henderson, Jack; Izzard, Robert; Janssens, Robert; Jayatissa, Heshani; José Pont, Jordi (American Physical Society, 2023-09-14)
    Article
    Accés obert
    The 25Al(p,¿) reaction has long been highlighted as a possible means to bypass the production of 26Al cosmic ¿ rays in classical nova explosions. However, uncertainties in the properties of key resonant states in 26Si have ...
  • Nuclear physics midterm plan at LNS 

    Agodi, Clementina; Cappuzzello, Francesco; Cardella, Giuseppe; Cirrone, Pablo; De Filippo, Enrico; di Pietro, Alessia; Gargano, Angela; la Cognata, Marco; Mascali, David; Milluzzo, Giuliana; Nania, Rosario; José Pont, Jordi (Springer, 2023-11-24)
    Article
    Accés obert
    The next years will see the completion of several new facilities at Istituto Nazionale di Fisica Nucleare – Laboratori Nazionali del Sud (LNS) opening up new possibilities in the fields of nuclear structure, nuclear dynamics, ...
  • Sub-second infrared variability from the archetypal accreting neutron star 4U 1728-34 

    Vincentelli, Federico; Casella, Piergiorgio; Borghese, Alice; Cavecchi, Yuri; Mastroserio, Guglielmo; Stella, Luigi; Altamirano, Diego; Armas Padilla, Montserrat; Baglio, Maria Cristina; Belloni, Fabio; Casares, Jorge; Cúneo, Virginia; Degenaar, Nathalie (Oxford University Press, 2023-10-25)
    Article
    Accés obert
    We report on the first simultaneous high-time resolution X-ray and infrared (IR) observations of a neutron star low mass X-ray binary in its hard state. We performed ¿h of simultaneous observations of 4U 1728-34 using ...
  • General relativistic pulsations of ultra-massive ZZ Ceti stars 

    Córsico, Alejandro H.; Boston, Reece; Althaus, Leandro G.; Kilic, Mukremin; Kepler, Souza Oliveira; Camisassa, María Eugenia; Torres Gil, Santiago (Oxford University Press, 2023-10-01)
    Article
    Accés obert
    Ultra-massive white dwarf stars are currently being discovered at a considerable rate, thanks to surveys such as the Gaia space mission. These dense and compact stellar remnants likely play a major role in Type Ia supernova ...
  • The orbital period of the recurrent nova V2487 Oph revealed 

    Rodríguez Gil, Pablo; Corral Santana, Jesus M.; Elias Rosa, Nancy; Gänsicke, Boris T.; Hernanz, Margarita; Sala Cladellas, Glòria (Oxford University Press, 2023-10-12)
    Article
    Accés obert
    We present the first reliable determination of the orbital period of the recurrent nova V2487 Oph (Nova Oph 1998). We derived a value of 0.753 ± 0.016 d (18.1 ± 0.4 h) from the radial velocity curve of the intense He¿II ...
  • Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes 

    Fougères, Chloé; de Oliveira Santos, François; José Pont, Jordi; Michelagnoli, Caterina; Clément, Emmanuel; Kim, Yung Hee; Lemasson, Antoine; Guimarães, Valdir; Barrientos, Diego; Bemmerer, Daniel; Benzoni, Giovanna; Boston, Andrew J. (2023-09-22)
    Article
    Accés obert
    Classical novae are thermonuclear explosions in stellar binary systems, and important sources of 26Al and 22Na. While ¿ rays from the decay of the former radioisotope have been observed throughout the Galaxy, 22Na remains ...
  • Mass-loss and composition of wind ejecta in type I X-ray bursts 

    Herrera, Yago; Sala Cladellas, Glòria; José Pont, Jordi (EDP Sciences, 2023-10-17)
    Article
    Accés obert
    Context. X-Ray bursts (XRBs) are powerful thermonuclear events on the surface of accreting neutron stars (NSs) where nucleosynthesis of intermediate-mass elements occurs. The high surface gravity of an NS prevents the ...
  • The lively accretion disk in NGC 2992. III. Tentative evidence of rapid ultrafast outflow variability 

    Luminari, Alfredo; Marinucci, Andrea; Bianchi, Stefano; Marco, Barbara de; Feruglio, Chiara; Matt, Giorgio; Middei, Riccardo; Nardini, Emanuele; Piconcelli, Enrico; Puccetti, Simonetta; Tombesi, Francesco (Institute of Physics (IOP), 2023-06-01)
    Article
    Accés obert
    We report on the 2019 XMM-Newton+NuSTAR monitoring campaign of the Seyfert galaxy NGC 2992, observed at one of its highest flux levels in the X-rays. The time-averaged spectra of the two XMM-Newton orbits show ultrafast ...
  • Gamma-ray observations of MAXI J1820+070 during the 2018 outburst 

    Collaboration, MAGIC; Collaboration, VERITAS; Bosch Ramon, Valentí; Celma Querol, Carlos; Linares Alegret, Manuel; Russell, David; Sala Cladellas, Glòria (Oxford University Press, 2022-11-04)
    Article
    Accés obert
    MAXI J1820+070 is a low-mass X-ray binary with a black hole (BH) as a compact object. This binary underwent an exceptionally bright X-ray outburst from 2018 March to October, showing evidence of a non-thermal particle ...

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