Zobrazeno 1 - 10
of 92
pro vyhledávání: '"A. Koutsouridou"'
The recent JWST observation of the Firefly Sparkle at $z=8.3$ offers a unique opportunity to link the high- and the low-$z$ Universe. Indeed, the claim of it being a Milky Way (MW) type of assembly at the cosmic dawn opens the possibility of interpre
Externí odkaz:
http://arxiv.org/abs/2407.06255
The elusive properties of the first (Pop III) stars can be indirectly unveiled by uncovering their true descendants. To this aim, we exploit our data-calibrated model for the best-studied ultra-faint dwarf (UFD) galaxy, Bo\"otes I, which tracks the c
Externí odkaz:
http://arxiv.org/abs/2406.12960
Autor:
Fu, Hao, Shankar, Francesco, Ayromlou, Mohammadreza, Koutsouridou, Ioanna, Cattaneo, Andrea, Bertemes, Caroline, Bellstedt, Sabine, Martín-Navarro, Ignacio, Leja, Joel, Allevato, Viola, Bernardi, Mariangela, Boco, Lumen, Dimauro, Paola, Gruppioni, Carlotta, Lapi, Andrea, Menci, Nicola, Rodríguez, Iván Muñoz, Puglisi, Annagrazia, Alonso-Tetilla, Alba V.
In a hierarchical, dark matter-dominated Universe, stellar mass functions (SMFs), galaxy merger rates, star formation histories (SFHs), satellite abundances, and intracluster light, should all be intimately connected observables. However, the systema
Externí odkaz:
http://arxiv.org/abs/2406.07605
Autor:
Skúladóttir, Ása, Koutsouridou, Ioanna, Vanni, Irene, Amarsi, Anish M., Lucchesi, Romain, Salvadori, Stefania, Aguado, David
The first (Pop III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Pop III stars in the range 140-260 M$_\odot$ are predicted to end their lives as pair-instability supernovae (PISNe), enriching the env
Externí odkaz:
http://arxiv.org/abs/2404.19086
Publikováno v:
The Astrophysical Journal Letters (2024), Volume 962, Issue 2, id.L26, 6 pp
The initial mass function (IMF) of the first Pop III stars remains a persistent mystery. Their predicted massive nature implies the existence of stars exploding as pair-instability supernovae (PISN), but no observational evidence had been found. Now,
Externí odkaz:
http://arxiv.org/abs/2312.05309
The metal-poor stars in the Galactic halo are thought to show the imprints of the first (PopIII) stars, and thus provide a glance at the first episodes of star formation. In this work, we aim at understanding whether all very metal-poor stars formed
Externí odkaz:
http://arxiv.org/abs/2309.07958
Publikováno v:
Monthly Notices of the Royal Astronomical Society (2023), Volume 525, Issue 1, pp.190-210
The nature of the first Pop III stars is still a mystery and the energy distribution of the first supernovae is completely unexplored. For the first time we account simultaneously for the unknown initial mass function (IMF), stellar mixing, and energ
Externí odkaz:
http://arxiv.org/abs/2309.00045
Autor:
Pagnini, Giulia, Salvadori, Stefania, Rossi, Martina, Aguado, David, Koutsouridou, Ioanna, Skúladóttir, Ása
The chemical fingerprints of the first stars are retained within the photospheres of ancient unevolved metal-poor stars. A significant fraction of these stellar fossils is represented by stars known as Carbon-Enhanced Metal-Poor (CEMP), $\rm [C/Fe]>+
Externí odkaz:
http://arxiv.org/abs/2303.14204
Autor:
Aguado, D. S., Salvadori, S., Skúladóttir, A., Caffau, E., Bonifacio, P., Vanni, I., Gelli, V., Koutsouridou, I., Amarsi, A. M.
The very massive first stars ($m>100\rm M_{\odot}$) were fundamental to the early phases of reionization, metal enrichment, and super-massive black hole formation. Among them, those with $140\leq\rm m/\rm M_{\odot}\leq260$ are predicted to evolve as
Externí odkaz:
http://arxiv.org/abs/2301.03604
Autor:
Koutsouridou, Ioanna, Cattaneo, Andrea
Publikováno v:
Monthly Notices of the Royal Astronomical Society (2022), Volume 516, Issue 3, pp.4194-4211
We use a semianalytic model of galaxy formation to compare the predictions of two quenching scenarios: halo quenching and black-hole (BH) quenching. After calibrating both models so that they fit the mass function of galaxies, BH quenching is in bett
Externí odkaz:
http://arxiv.org/abs/2209.12883