Zobrazeno 1 - 10
of 1 658
pro vyhledávání: '"Common envelope"'
Autor:
Zhuo Chen, Natalia Ivanova
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 2, p L35 (2024)
Luminous red novae and their connection to common envelope evolution (CEE) remain elusive in astrophysics. Here, we present a radiation hydrodynamic model capable of simulating the light curves of material ejected during a CEE. For the first time, th
Externí odkaz:
https://doaj.org/article/c58b2fe26acd40119edbf53fc76ac263
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 132 (2024)
Thorne–Żytkow objects (TŻOs), hypothetical merger products in which a neutron star is embedded in a stellar core, are traditionally considered steady-state configurations. Their assembly, especially through dynamical channels, is not well underst
Externí odkaz:
https://doaj.org/article/3cbd2916ea264e0f93762fb881483032
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 1 (2024)
We explore the evolution of massive stars (>8 M _⊙ ) with 1D models and present analytical fits to the masses and binding energies of the convective portions of their envelopes. These fits are given as functions of total mass, metallicity, and surf
Externí odkaz:
https://doaj.org/article/176f2bc9dbbb4369a938c1ad73e98545
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 1, p 11 (2024)
The unstable mass transfer situation in binary systems will asymptotically cause the adiabatic expansion of the donor star and finally lead to the common envelope phase. This process could happen in helium binary systems once the helium donor star fi
Externí odkaz:
https://doaj.org/article/40947e30659a48b99324dac63868725b
Autor:
A. Generozov, H. B. Perets
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 83 (2024)
Recently, several noninteracting black hole–stellar binaries have been identified in Gaia data—for example, Gaia BH1, where a Sun-like star is in a moderately eccentric ( e = 0.44) 185 days orbit around a black hole. This orbit is difficult to ex
Externí odkaz:
https://doaj.org/article/1be9f395f6284229876b457669e400aa
Autor:
Zhenwei Li, Yangyang Zhang, Hailiang Chen, Hongwei Ge, Dengkai Jiang, Jiangdan Li, Xuefei Chen, Zhanwen Han
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 22 (2024)
The hot subdwarf O/B stars (sdO/Bs) are known as extreme horizontal branch stars, which is of great importance in stellar evolution theory. The sdO/Bs are generally thought to have a helium-burning core and a thin hydrogen envelope ( M _env < 0.02 M
Externí odkaz:
https://doaj.org/article/bd8d833b21a94b58b816069331824033
Autor:
Peter Scherbak, Jim Fuller
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 185 (2024)
Double white dwarf (WD) binaries are increasingly being discovered at short orbital periods where strong tidal effects and significant tidal heating signatures may occur. We assume that the tidal potential of the companion excites outgoing gravity wa
Externí odkaz:
https://doaj.org/article/d0f8148567a5451a8f7cde9ba1ddd267
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 168 (2024)
We investigate the merger between a 16 M _⊙ star, on its way to becoming a red supergiant (RSG), and a 4 M _⊙ main-sequence companion. Our study employs three-dimensional hydrodynamic simulations using the state-of-the-art adaptive mesh refi
Externí odkaz:
https://doaj.org/article/d46487c9e2e04c5e91f1744acd869f5e
Autor:
Travis Court, Carles Badenes, Shiu-Hang Lee, Daniel Patnaude, Guillermo García-Segura, Eduardo Bravo
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 63 (2024)
The nature of Type Ia supernova (SN Ia) explosions remains an open issue, with several contending progenitor scenarios actively being considered. One such scenario involves an SN Ia explosion inside a planetary nebula (PN) in the aftermath of a stell
Externí odkaz:
https://doaj.org/article/7327c96b03ce41a795dfcdd97c73090d
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 69 (2024)
When modeling the population of merging binary black holes, analyses have generally focused on characterizing the distribution of primary (i.e., more massive) black holes in the binary, while using simplistic prescriptions for the distribution of sec
Externí odkaz:
https://doaj.org/article/36f992b65b4a47c6a48c4a748edf4b31