Zobrazeno 1 - 10
of 744
pro vyhledávání: '"Population III [Stars]"'
Autor:
Alessandra Venditti, Volker Bromm, Steven L. Finkelstein, Antonello Calabrò, Lorenzo Napolitano, Luca Graziani, Raffaella Schneider
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L12 (2024)
The gas surrounding first-generation (Population III, hereafter Pop III) stars is expected to emit a distinct signature in the form of the He ii recombination line at 1640 Å(He ii λ 1640). Here we explore the challenges and opportunities in identif
Externí odkaz:
https://doaj.org/article/3a4df20396324bca9407a5ea6b8f8e93
Autor:
Ása Skúladóttir, Ioanna Koutsouridou, Irene Vanni, Anish M. Amarsi, Romain Lucchesi, Stefania Salvadori, David S. Aguado
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L23 (2024)
The first (Population III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Population III stars in the range 140–260 M _⊙ are predicted to end their lives as pair-instability supernovae (PISNe), enri
Externí odkaz:
https://doaj.org/article/d3bf49c1ab2a430d86827efcb4248de0
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L22 (2024)
Unveiling the chemical fingerprints of the first (Population III, hereafter Pop III) stars is crucial for indirectly studying their properties and probing their massive nature. In particular, very massive Pop III stars explode as energetic pair-insta
Externí odkaz:
https://doaj.org/article/5354468e24f845c28683a887de7352e5
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 2, p L33 (2024)
The first-generation metal-free stars, referred to as Population III (Pop III) stars, are believed to be the first objects to form out of the pristine gas in the very early Universe. Pop III stars have different structures from the current generation
Externí odkaz:
https://doaj.org/article/bd0e58800a5c484c9acce4d23d745d95
Autor:
Siwei Zou, Zheng Cai, Feige Wang, Xiaohui Fan, Jaclyn B. Champagne, Joseph F. Hennawi, Jan-Torge Schindler, Emanuele Paolo Farina, Jinyi Yang, Kohei Inayoshi, Eduardo Bañados, Sarah E. I. Bosman, Zihao Li, Xiaojing Lin, Yunjing Wu, Fengwu Sun, Ziyi Guo, Girish Kulkuarni, Mélanie Habouzit, Stephane Charlot, Jacopo Chevallard, Thomas Connor, Anna-Christina Eilers, Linhua Jiang, Xiangyu Jin, Koki Kakiichi, Mingyu Li, Romain A. Meyer, Fabian Walter, Huanian Zhang
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L28 (2024)
We characterize the multiphase circumgalactic medium (CGM) and galaxy properties at z = 6.0–6.5 in four quasar fields from the James Webb Space Telescope A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE) program. We use the Ve
Externí odkaz:
https://doaj.org/article/aa78eacf81514764b0bc2561595871e2
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 2, p L26 (2024)
The initial mass function (IMF) of the first Population III (Pop III) stars remains a persistent mystery. Their predicted massive nature implies the existence of stars exploding as pair-instability supernovae (PISNe), but no observational evidence ha
Externí odkaz:
https://doaj.org/article/43b22fc4d5dc4d8eaa3f4ef0fa2977e2
Autor:
Alexander P. Ji, Sanjana Curtis, Nicholas Storm, Vedant Chandra, Kevin C. Schlaufman, Keivan G. Stassun, Alexander Heger, Marco Pignatari, Adrian M. Price-Whelan, Maria Bergemann, Guy S. Stringfellow, Carla Fröhlich, Henrique Reggiani, Erika M. Holmbeck, Jamie Tayar, Shivani P. Shah, Emily J. Griffith, Chervin F. P. Laporte, Andrew R. Casey, Keith Hawkins, Danny Horta, William Cerny, Pierre Thibodeaux, Sam A. Usman, João A. S. Amarante, Rachael L. Beaton, Phillip A. Cargile, Cristina Chiappini, Charlie Conroy, Jennifer A. Johnson, Juna A. Kollmeier, Haining Li, Sarah Loebman, Georges Meynet, Dmitry Bizyaev, Joel R. Brownstein, Pramod Gupta, Sean Morrison, Kaike Pan, Solange V. Ramirez, Hans-Walter Rix, José Sánchez-Gallego
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 2, p L41 (2024)
Stars that formed with an initial mass of over 50 M _⊙ are very rare today, but they are thought to be more common in the early Universe. The fates of those early, metal-poor, massive stars are highly uncertain. Most are expected to directly collap
Externí odkaz:
https://doaj.org/article/cb019f1a53ca4e8bbf8ef53fff9533f7
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 236 (2024)
The first star-forming objects that formed at high redshifts during the cosmic dawn (CD) also emitted photons between Ly α and Lyman-limit frequencies. These photons are instrumental in coupling the spin temperature of the neutral hydrogen (H i ) at
Externí odkaz:
https://doaj.org/article/a6c6157d1b3e4e68b6fcce4e5605698e
Autor:
Yang Luo, Isaac Shlosman
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 85 (2024)
We have used high-resolution zoom-in simulations of direct collapse to supermassive black hole (SMBH) seeds within dark mater halos in the presence of magnetic fields generated during the collapse, down to 10 ^−5 pc or 2 au. We confirm an efficient
Externí odkaz:
https://doaj.org/article/c759475b7dfe4aa4a938dfbac3f15cf3
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 68 (2024)
The most metal-poor stars record the earliest metal enrichment triggered by Population III stars. By comparing observed abundance patterns with theoretical yields of metal-free stars, physical properties of their first star progenitors can be inferre
Externí odkaz:
https://doaj.org/article/83883fd08dc34e408aed5ce3b2d4ab86