Zobrazeno 1 - 10
of 387
pro vyhledávání: '"Costa Guglielmo"'
Binaries with a Wolf-Rayet star and a compact object (WR-COs), either a black hole (BH) or a neutron star (NS), have been proposed as possible progenitors for the binary compact object mergers (BCOs) observed with the gravitational wave (GW) detector
Externí odkaz:
http://arxiv.org/abs/2410.08965
Autor:
Marigo, Paola, Addari, Francesco, Bossini, Diego, Bressan, Alessandro, Costa, Guglielmo, Girardi, Leo, Trabucchi, Michele, Volpato, Guglielmo
We address the critical need for accurate Rosseland mean gas opacities in high-pressure environments, spanning temperatures from 100 K to 32000 K. Current opacity tables from Wichita State University and AESOPUS 2.0 are limited to $\log(R) \le 1$, wh
Externí odkaz:
http://arxiv.org/abs/2409.10905
Autor:
Gabrielli, Francesco, Lapi, Andrea, Boco, Lumen, Ugolini, Cristiano, Costa, Guglielmo, Sgalletta, Cecilia, Shepherd, Kendall, Di Carlo, Ugo N., Bressan, Alessandro, Limongi, Marco, Spera, Mario
Pair-instability supernovae (PISNe) have crucial implications for many astrophysical topics, including the search for very massive stars, the black hole mass spectrum, and galaxy chemical enrichment. To this end, we need to understand where PISNe are
Externí odkaz:
http://arxiv.org/abs/2408.16823
Autor:
Liu, Boyuan, Hartwig, Tilman, Sartorio, Nina S., Dvorkin, Irina, Costa, Guglielmo, Santoliquido, Filippo, Fialkov, Anastasia, Klessen, Ralf S., Bromm, Volker
The gravitational wave (GW) signal from binary black hole (BBH) mergers is a promising probe of Population III (Pop III) stars. To fully unleash the power of the GW probe, one important step is to understand the relative importance and features of di
Externí odkaz:
http://arxiv.org/abs/2406.17397
Autor:
Mestichelli, Benedetta, Mapelli, Michela, Torniamenti, Stefano, Sedda, Manuel Arca, Branchesi, Marica, Costa, Guglielmo, Iorio, Giuliano, Santoliquido, Filippo
Publikováno v:
A&A 690, A106 (2024)
Binary black holes (BBHs) born from the evolution of Population III (Pop. III) stars are one of the main high-redshift targets for next-generation ground-based gravitational-wave (GW) detectors. Their predicted initial mass function and lack of metal
Externí odkaz:
http://arxiv.org/abs/2405.06037
Autor:
Iorio, Giuliano, Torniamenti, Stefano, Mapelli, Michela, Dall'Amico, Marco, Trani, Alessandro A., Rastello, Sara, Sgalletta, Cecilia, Rinaldi, Stefano, Costa, Guglielmo, Dhal-Lahtinen, Bera A., Escobar, Gaston J., Korb, Erika, Vaccaro, M. Paola, Lacchin, Elena, Mestichelli, Benedetta, di Carlo, Ugo Niccolò, Spera, Mario, Sedda, Manuel Arca
Publikováno v:
A&A 690, A144 (2024)
Gaia BH3 is the first observed dormant black hole (BH) with a mass of $\approx{30}$ M$_\odot$ and represents the first confirmation that such massive BHs are associated with metal-poor stars. Here, we explore the isolated binary formation channel for
Externí odkaz:
http://arxiv.org/abs/2404.17568
Autor:
Addari, Francesco, Marigo, Paola, Bressan, Alessandro, Costa, Guglielmo, Shepherd, Kendall, Volpato, Guglielmo
The initial-final mass relation (IFMR) plays a crucial role in understanding stellar structure and evolution by linking a star's initial mass to the mass of the resulting white dwarf. This study explores the IFMR in the initial mass range $0.8 \leq M
Externí odkaz:
http://arxiv.org/abs/2401.09812
Autor:
Zackrisson, Erik, Hultquist, Adam, Kordt, Aron, Diego, José M., Nabizadeh, Armin, Vikaeus, Anton, Meena, Ashish Kumar, Zitrin, Adi, Volpato, Guglielmo, Lundqvist, Emma, Welch, Brian, Costa, Guglielmo, Windhorst, Rogier A.
Gravitational lensing may render individual high-mass stars detectable out to cosmological distances, and several extremely magnified stars have in recent years been detected out to redshifts $z\approx 6$. Here, we present Muspelheim, a model for the
Externí odkaz:
http://arxiv.org/abs/2312.09289
Autor:
Volpato, Guglielmo, Marigo, Paola, Costa, Guglielmo, Bressan, Alessandro, Trabucchi, Michele, Girardi, Léo, Addari, Francesco
Publikováno v:
ApJ 961 89 (2024)
We calculate new evolutionary models of rotating primordial very massive stars, with initial mass from $100\,M_{\odot}$ to $200\,M_{\odot}$, for two values of the initial metallicity ${Z=0}$ and ${Z=0.0002}$. For the first time in this mass range, we
Externí odkaz:
http://arxiv.org/abs/2311.18429
Autor:
Mazzi, Alessandro, Girardi, Léo, Trabucchi, Michele, Dalcanton, Julianne J., Luger, Rodrigo, Marigo, Paola, Miglio, Andrea, Costa, Guglielmo, Chen, Yang, Pastorelli, Giada, Fouesneau, Morgan, Zaggia, Simone, Bressan, Alessandro, Tio, Piero Dal
Starting from the Gaia DR3 HR diagram, we derive the star formation history (SFH) as a function of distance from the Galactic Plane within a cylinder centred on the Sun with a 200~pc radius and spanning 1.3~kpc above and below the Galaxy's midplane.
Externí odkaz:
http://arxiv.org/abs/2309.13453