Zobrazeno 1 - 10
of 261
pro vyhledávání: '"Frederic A. Rasio"'
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 77 (2024)
The existence of compact stellar remnants in the mass range 2–5 M _⊙ has long been debated. This so-called lower-mass gap (LMG) was initially suggested by the lack of low-mass X-ray binary observations with accretors about 2–5 M _⊙ , but it h
Externí odkaz:
https://doaj.org/article/31f710506b334b05a2f4f49c9e2be366
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 112 (2024)
We explore three-body binary formation (3BBF), the formation of a bound system via gravitational scattering of three initially unbound bodies (3UB), using direct numerical integrations. For the first time, we consider systems with unequal masses, as
Externí odkaz:
https://doaj.org/article/791ee3fe4da940599cdf050c95bd9556
Autor:
Elena González Prieto, Newlin C. Weatherford, Giacomo Fragione, Kyle Kremer, Frederic A. Rasio
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 29 (2024)
Very massive stars (VMSs) formed via a sequence of stellar collisions in dense star clusters have been proposed as the progenitors of massive black hole seeds. VMSs could indeed collapse to form intermediate-mass black holes, which would then grow by
Externí odkaz:
https://doaj.org/article/d1ad302e011e4f1bbc9cafcc3d8e6eef
Autor:
Newlin C. Weatherford, Frederic A. Rasio, Sourav Chatterjee, Giacomo Fragione, Fulya Kıroğlu, Kyle Kremer
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 42 (2024)
We apply for the first time orbit-averaged Monte Carlo star cluster simulations to study tidal tail and stellar stream formation from globular clusters (GCs), assuming a circular orbit in a time-independent spherical Galactic potential. Treating ener
Externí odkaz:
https://doaj.org/article/b7e9ddd676154f5bbb76989bd6101397
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 191 (2024)
Intermediate-mass black holes (IMBHs) are believed to be the missing link between the supermassive black holes (BHs) found at the centers of massive galaxies and BHs formed through stellar core collapse. One of the proposed mechanisms for their forma
Externí odkaz:
https://doaj.org/article/fe0c6bd6c7da445e81b237cd0cdcef02
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 98 (2024)
Globular clusters (GCs) are particularly efficient at forming millisecond pulsars. Among these pulsars, about half lack a companion star, a significantly higher fraction than in the Galactic field. This fraction increases further in some of the dense
Externí odkaz:
https://doaj.org/article/7b3b001573314ea38d5d91685eba36ee
Autor:
Giacomo Fragione, Frederic A. Rasio
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 2, p 129 (2023)
With about one hundred mergers of binary black holes (BBHs) detected via gravitational waves by the LIGO-Virgo-KAGRA (LVK) Collaboration, our understanding of the darkest objects in the universe has taken unparalleled steps forward. While most of the
Externí odkaz:
https://doaj.org/article/285692c4cee8481ea08b4aac9e002df0
Autor:
Fulya Kıroğlu, James C. Lombardi Jr., Kyle Kremer, Giacomo Fragione, Shane Fogarty, Frederic A. Rasio
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 2, p 89 (2023)
We study close encounters of a 1 M _⊙ middle-age main-sequence star (modeled using MESA) with massive black holes through hydrodynamic simulations, and explore in particular the dependence of the outcomes on the black hole mass. We consider here bl
Externí odkaz:
https://doaj.org/article/6787dc16d76a4539aa421543f87ac0f4
Autor:
Newlin C. Weatherford, Fulya Kıroğlu, Giacomo Fragione, Sourav Chatterjee, Kyle Kremer, Frederic A. Rasio
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 2, p 104 (2023)
The theory of stellar escape from globular clusters (GCs) dates back nearly a century, especially the gradual evaporation of GCs via two-body relaxation coupled with external tides. More violent ejection can also occur via strong gravitational scatte
Externí odkaz:
https://doaj.org/article/fa2e612b205b494385b62f05bc5b76e8
Autor:
Joshua A. Faber, Frederic A. Rasio
Publikováno v:
Living Reviews in Relativity, Vol 15, p 8 (2012)
We review the current status of studies of the coalescence of binary neutron star systems. We begin with a discussion of the formation channels of merging binaries and we discuss the most recent theoretical predictions for merger rates. Next, we turn
Externí odkaz:
https://doaj.org/article/4a7af70cbbb14f64b2af5dbd020d6d5e