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pro vyhledávání: '"Rasio, Frederic"'
Dynamical interactions in dense star clusters could significantly influence the properties of black holes, leaving imprints on their gravitational-wave signatures. While previous studies have mostly focused on repeated black hole mergers for spin and
Externí odkaz:
http://arxiv.org/abs/2410.01879
Autor:
Kremer, Kyle, Ye, Claire S., Heinke, Craig O., Piro, Anthony L., Ransom, Scott M., Rasio, Frederic A.
Alongside the population of several hundred radio millisecond pulsars currently known in Milky Way globular clusters, a subset of six slowly spinning pulsars (spin periods $0.3-4\,$s) are also observed. With inferred magnetic fields $\gtrsim 10^{11}\
Externí odkaz:
http://arxiv.org/abs/2409.07527
The existence of compact stellar remnants in the mass range $2-5\,M_{\odot}$ has long been debated. This so-called lower mass gap was initially suggested by the lack of low-mass X-ray binary observations with accretors about $2-5\,M_{\odot}$, but it
Externí odkaz:
http://arxiv.org/abs/2408.00076
Autor:
Prieto, Elena González, Weatherford, Newlin C., Fragione, Giacomo, Kremer, Kyle, Rasio, Frederic A.
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 (IMBHs), which would then
Externí odkaz:
http://arxiv.org/abs/2404.11646
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:
http://arxiv.org/abs/2402.12429
Autor:
Purohit, Rujuta A., Fragione, Giacomo, Rasio, Frederic A., Petter, Grayson C., Hickox, Ryan C.
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:
http://arxiv.org/abs/2401.06731
Autor:
Weatherford, Newlin C., Rasio, Frederic A., Chatterjee, Sourav, Fragione, Giacomo, Kıroğlu, Fulya, Kremer, Kyle
We apply for the first time the Monte Carlo star cluster modeling method to study tidal tail and stellar stream formation from globular clusters, assuming a circular orbit in a smooth Galactic potential. Approximating energetically unbound bodies (po
Externí odkaz:
http://arxiv.org/abs/2310.01485
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:
http://arxiv.org/abs/2307.15740
Autor:
Fragione, Giacomo, Rasio, Frederic A.
With about a 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 e
Externí odkaz:
http://arxiv.org/abs/2302.11613
Autor:
Weatherford, Newlin C., Kıroğlu, Fulya, Fragione, Giacomo, Chatterjee, Sourav, Kremer, Kyle, Rasio, Frederic A.
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:
http://arxiv.org/abs/2211.16523