Now showing items 1-12 of 353

    • Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey 

      Brown, Alexander James; Parsons, Steven G.; van Roestel, Jan; Rebassa Mansergas, Alberto; Breedt, Elmé; Dhillon, Vikram S.; Dyer, Martin J.; Green, Matthew J.; Kerry, Paul; Littlefair, Stuart P.; Marsh, Thomas R.; Munday, James; Pelisoli, Ingrid; Sahman, David I.; Wild, James F. (Oxford University Press, 2023-02-27)
      Article
      Open Access
      Wide-field time-domain photometric sky surveys are now finding hundreds of eclipsing white dwarf plus M dwarf binaries, a population encompassing a wealth of information and potential insight into white dwarf and close ...
    • The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation 

      Jin, Shuanggen; Drew, Janet E.; Gänsicke, Boris T.; Aguado Fernández, Maria Dolores; Antoja, T.; Babusiaux, C.; Battaglia, Giuseppe; Hoskin, Matthew; Pérez Ràfols, Ignasi; Pico, Sandra; Raddi, Roberto; Ashley, R. P.; Bernard, Escudié; Bosma, A.; Cantat Gaudin, Tristan; Castro Ginard, Alfred; Casamiquela Floriach, Laia; Figueras Siñol, Francesca; Greimel, Robert; Hughes, Samantha J.; Jordi Nebot, Carme; Barberá Flichi, Francesc; Larsen, Sine; Miralda Escudé, Jordi; Morelli, Luca; Naylor, Tim; Hochrainer, M; Ramos Herrero, Paula; Grossi, Emanuele; Sanna, Nico; Steele, I. A.; Vink, J; Wilson, Alice; Wright, Nicholas; Zurita, C (Oxford University Press, 2023-03-11)
      Article
      Open Access
      WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, will see first light in late 2022. WEAVE comprises a new 2-degree field-of-view prime-focus corrector system, ...
    • White dwarf spectral type-temperature distribution from Gaia DR3 and the Virtual Observatory 

      Torres Gil, Santiago; Cruz Gamba, Patricia; Murillo Ojeda, Raquel; Jiménez Esteban, F. M.; Rebassa Mansergas, Alberto; Solano Márquez, Enrique; Camisassa, María Eugenia; Raddi, Roberto; Doliguez Le Lourec, J. (EDP Sciences, 2023-09-21)
      Article
      Open Access
      Context. The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. However, the inclusion of physical processes such as convective ...
    • Spectral classification of the 100 pc white dwarf population from Gaia-DR3 and the virtual observatory 

      Jiménez Esteban, F. M.; Torres Gil, Santiago; Rebassa Mansergas, Alberto; Cruz Gamba, Patricia; Murillo Ojeda, Raquel; Solano Márquez, Enrique; Rodrigo Blanco, Carlos; Camisassa, María Eugenia (Oxford University Press, 2023-02-01)
      Article
      Open Access
      The third data release of Gaia has provided low resolution spectra for 100 000 white dwarfs (WDs) that, together with the excellent photometry and astrometry, represent an unrivalled benchmark for the study of this ...
    • The unusual planetary nebula nucleus in the Galactic open cluster M37 and six further hot white dwarf candidates 

      Werner, Klaus; Reindl, Nicole; Raddi, Roberto; Griggio, Massimo; Bedin, Luigi; Camisassa, María Eugenia; Rebassa Mansergas, Alberto; Torres Gil, Santiago; Goodhew, Peter (EDP Sciences, 2023-10-01)
      Article
      Open Access
      Planetary nebulae in Galactic open star clusters are rare objects; only three are known to date. They are of particular interest because their distance can be determined with high accuracy, allowing one to characterize the ...
    • 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; Mancuso, Giulio C.; Sanna, Andrea; Swank, Jean H. (Institute of Physics (IOP), 2023-11-13)
      Article
      Open Access
      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
      Open Access
      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
      Restricted access - publisher's policy
      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
      Open Access
      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
      Open Access
      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
      Open Access
      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
      Open Access
      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 ...