Exploració per tema "Estels"

Ara es mostren els items 1-20 de 57

    • A remarkable recurrent nova in M31: Discovery and optical/UV observations of the predicted 2014 eruption 

      Darnley, M. J.; Henze, Martin; Steele, I. A.; Bode, M. F.; Ribeiro, V. A.; Rodríguez-Gil, Pablo; Shafter, A. W.; Williams, S. C.; Baer, D.; Hachisu, I.; Hernanz Carbó, Margarita; Hornoch, K.; Hounsell, R.; Kato, M.; Kiyota, S.; Kucakova, H.; Maehara, H.; Ness, Jan-Uwe; Piascik, A. S.; Sala Cladellas, Glòria; Skillen, I.; Smith, R. J.; Wolf, M. (2015-08-01)
      Article
      Accés obert
      The Andromeda Galaxy recurrent nova M31N 2008-12a had been caught in eruption eight times. The inter-eruption period of M31N 2008-12a is similar to 1 yr, making it the most rapidly recurring system known, and a strong ...

    • A Trojan horse approach to the production of 18F in Novae 

      la Cognata, M; Pizzone, R; José Pont, Jordi; Hernanz Carbó, Margarita; Cherubini, S; Gulino, M; Rapisarda, G; Spitaleri, C (2017-09-01)
      Article
      Accés obert
      Crucial information on nova nucleosynthesis can be potentially inferred from ¿-ray signals powered by 18F decay. Therefore, the reaction network producing and destroying this radioactive isotope has been extensively studied ...

    • Analysis of extremely metal-poor stars abundances 

      Rivero Sosa, Nathaniel (Universitat Politècnica de Catalunya, 2023-07-25)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      Context: Understanding the origin of the oldest stars in the universe is crucial to shed light on its early chemical evolution and on the formation history of the Milky Way. The oldest stars were either the direct heirs ...

    • Blue extreme disk-runaway stars with Gaia EDR3 

      Irrgang, Andreas; Dimpel, Markus; Heber, Ulrich; Raddi, Roberto (EDP Sciences, 2021-02-01)
      Article
      Accés obert
      Since the discovery of hypervelocity stars in 2005, it has been widely believed that only the disruption of a binary system by a supermassive black hole at the Galactic center (GC), that is, the so-called Hills mechanism, ...

    • Breaking the habit: the peculiar 2016 eruption of the unique recurrent nova M31N 2008-12a 

      Henze, Martin; Darnley, Matt J.; Williams, Steven Charles; Sala Cladellas, Glòria; José Pont, Jordi (2018-04-10)
      Article
      Accés obert

    • Coordinated analysis of two graphite grains from the CO3.0 LAP 031117 meteorite: First identification of a CO Nova graphite and a presolar iron sulfide subgrain 

      Haenecour, P.; Floss, C.; José Pont, Jordi; Amari, S.; Lodders, K.; Jadhav, M.; Wang, A.; Gyngard, F. (2016-07)
      Article
      Accés obert
      Presolar grains constitute remnants of stars that existed before the formation of the solar system. In addition to providing direct information on the materials from which the solar system formed, these grains provide ...

    • Different Accretion Heating of the Neutron Star Crust during Multiple Outbursts in MAXI J0556-332 

      Parikh, Aastha S.; Homan, Jeroen; Wijnands, Rudy; Ootes, Laura; Page, Dany; Altamirano, Diego; Degenaar, Nathalie; Brown, Edward F.; Cackett, Edward; Cumming, Andrew; Deibel, Alex; Fridriksson, Joel K.; Lin, Dacheng; Linares Alegret, Manuel; Miller, Jon M. (2017-12-20)
      Article
      Accés obert
      The transient neutron star (NS) low-mass X-ray binary MAXI J0556-332 provides a rare opportunity to study NS crust heating and subsequent cooling for multiple outbursts of the same source. We examine MAXI, Swift, Chandra, ...

    • Estudio de una vela de kitesurf, análisis de actuaciones y redacción del manual de uso 

      Domene Ochoa, Alex (Universitat Politècnica de Catalunya, 2014-09)
      Projecte/Treball Final de Carrera
      Accés obert

    • Evolution and CNO yields of Z = 10-5 stars and possible effects on carbon-enhanced metal-poor production 

      Gil Pons, Pilar; Doherty, Carolyn L.; Lau, Herbert B.; Campbell, Simon W; Suda, Takuma; Guilani, Shervin Mansouri; Gutiérrez Cabello, Jordi; Lattanzio, John C. (2013-09)
      Article
      Accés obert
      Aims. Our main goals are to get a deeper insight into the evolution and final fates of intermediate-mass, extremely metal-poor (EMP) stars. We also aim to investigate the C, N, and O yields of these stars. Methods. Using ...

    • 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
      Accés obert
      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. ...

    • Gamma-ray observations of Nova Sgr 2015 No. 2 with INTEGRAL 

      Siegert, Thomas; Coc, A; Delgado Soler, Laura; Diehl, Roland; Greiner, Jochen; Hernanz Carbó, Margarita; Jean, Pierre; José Pont, Jordi; Molaro, Paolo; Pleintinger, Mortiz M.M.; Savchenko, Volodymyr; Starrfield, Sumner; Tatischeff, Vincent; Weinberger, Christoph (EDP Sciences, 2018-07-23)
      Article
      Accés obert

    • Is there a chance for SNeI1/2? 

      Gil Pons, Pilar; Gutiérrez Cabello, Jordi; García-Berro Montilla, Enrique (2007-09)
      Article
      Accés obert
      The evolution of primordial stars of initial masses between 5 and 10 M⊙ has been computed and analyzed in order to determine the nature of the remnants of massive intermediate–mass primordial stars and to check the ...

    • J-PLUS: The javalambre photometric local universe survey 

      Cenarro Lagunas, Andrés Javier; Moles Villamate, Mariano; Cristóbal Hornillos, David; Rebassa Mansergas, Alberto (EDP Sciences, 2019-02-01)
      Article
      Accés obert
      The Javalambre-Photometric Local Universe Survey (J-PLUS ) is an ongoing 12-band photometric optical survey, observing thousands of square degrees of the Northern hemisphere from the dedicated JAST/T80 telescope at the ...

    • Laboratory evidence for co-condensed oxygen- and carbon-rich meteoritic stardust from nova outbursts 

      Haenecour, Pierre; Howe, Jane Y.; Zega, Thomas J.; Amari, Sachiko; Lodders, Katharina; José Pont, Jordi; Kaji, Kazutoshi; Sunaoshi, Takeshi; Atsushi, Muto (Springer Nature, 2019-04-29)
      Article
      Accés obert
      Although their parent stars no longer exist, the isotopic and chemical compositions and microstructure of individual stardust grains identified in meteorites provide unique constraints on dust formation and thermodynamic ...

    • M31N 2008-12a - The remarkable recurrent Nova in M31: Panchromatic observations of the 2015 eruption 

      Darnley, M. J.; Henze, Martin; Bode, M. F.; Hachisu, I.; Hernanz Carbó, Margarita; Hornoch, Kamil; Hounsell, R.; Kato, M.; Ness, Jan-Uwe; Osborne, Julian; Page, Kim; Ribeiro, V. A.; Rodríguez-Gil, Pablo; Shafter, A. W.; Shara, M.; Steele, I. A.; Williams, S. C.; Figueira, Joana; José Pont, Jordi; Sala Cladellas, Glòria (2016-12-20)
      Article
      Accés obert

    • Machine learning classification of the Gaia 3rd data release based on a random forest algorithm 

      Lopez Moreno, Sergio (Universitat Politècnica de Catalunya, 2021-09-13)
      Projecte Final de Màster Oficial
      Accés obert
      A new Gaia data release, EDR3, has been available since the end of last year containing a complete catalogue of nearly 2 billion stars. This huge wealth of information provided by this magnificent space astronomical mission ...

    • Measuring the ß-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region 

      Kiss, Gábor Gyula; Vitéz Sveiczer, András; Saito, Yukiya; Tarifeño Saldivia, Ariel Esteban; Pallàs i Solís, Max; Taín Enríquez, José Luis; Dillmann, Iris; Agramunt Ros, Jorge; Algora, A.; Domingo Pardo, César; Estrade, A; Appleton, Corrigan; Allmond, James Mitchell; Aguilera, Patricio; Baba, H. (Institute of Physics (IOP), 2022-09-06)
      Article
      Accés obert
      The ß-delayed neutron-emission probabilities of 28 exotic neutron-rich isotopes of Pm, Sm, Eu, and Gd were measured for the first time at RIKEN Nishina Center using the Advanced Implantation Detector Array (AIDA) and the ...

    • Mode identification in three pulsating hot subdwarfs observed with TESS satellite 

      Raddi, Roberto (Oxford University Press, 2020-07-01)
      Article
      Accés obert
      We report on the detection of pulsations of three pulsating subdwarf B stars observed by the TESS satellite and our results of mode identification in these stars based on an asymptotic period relation. SB 459 (TIC 067584818), ...

    • Monte Carlo simulations of the post-common envelope white dwarf-main sequence binary population 

      Camacho Díaz, Judit; Torres Gil, Santiago; García-Berro Montilla, Enrique; Zorotovic, Monica; Schreiber, Mathias R. (2010)
      Comunicació de congrés
      Accés obert

    • Multi-dimensional simulations of mixing in classical novae 

      Casanova Bustamante, Jordi (Universitat Politècnica de Catalunya, 2011-11-03)
      Tesi
      Accés obert
      Classical nova explosions are stellar explosions that take place in close binary systems with an energy release only exceeded by gamma-ray bursts and supernova explosions. Matter from the white dwarf flows through the inner ...