scholarly journals Simple recipes for compact remnant masses and natal kicks

2020 ◽  
Vol 499 (3) ◽  
pp. 3214-3221
Author(s):  
Ilya Mandel ◽  
Bernhard Müller
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Stellar Evolution ◽  
Three Dimensional ◽  
Population Synthesis ◽  
Intrinsic Stochasticity

ABSTRACT Based on recent results from three-dimensional supernova simulations and semi-analytical parametrized models, we develop analytical prescriptions for the dependence of the mass of neutron stars and black holes and the natal kicks, if any, on the pre-supernova carbon–oxygen core and helium shell masses. Our recipes are probabilistic rather than deterministic in order to account for the intrinsic stochasticity of stellar evolution and supernovae. We anticipate that these recipes will be particularly useful for rapid population synthesis, and we illustrate their application to distributions of remnant masses and kicks for a population of single stars.

Population Synthesis of Neutron Stars, Strange (Quark) Stars, and Black Holes

2002 ◽  
Vol 567 (1) ◽  
pp. L63-L66 ◽  
Author(s):  
Krzysztof Belczynski ◽  
Tomasz Bulik ◽  
Włodzimierz Kluźniak
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Strange Quark ◽  
Population Synthesis ◽  
Quark Stars

The stellar graveyard

2019 ◽  
pp. 177-206
Author(s):  
Nils Andersson
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Stellar Evolution ◽  
White Dwarfs ◽  
Supermassive Black Holes ◽  
Compact Objects ◽  
Fermi Gases ◽  
The 1950S

This chapter introduces the different classes of compact objects—white dwarfs, neutron stars, and black holes—that are relevant for gravitational-wave astronomy. The ideas are placed in the context of developing an understanding of the likely endpoint(s) of stellar evolution. Key ideas like Fermi gases and the Chandrasekhar mass are discussed, as is the emergence of general relativity as a cornerstone of astrophysics in the 1950s. Issues associated with different formation channels for, in particular, black holes are considered. The chapter ends with a discussion of the supermassive black holes that are found at the centre of galaxies.

scholarly journals Modeling the outcome of supernova explosions in binary population synthesis using the stellar compactness

2021 ◽  
Author(s):  
Maciej Dabrowny ◽  
Nicola Giacobbo ◽  
Davide Gerosa
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Binary Stars ◽  
Compact Objects ◽  
Population Synthesis ◽  
Subsequent Formation ◽  
Compact Binaries ◽  
Mass Gap ◽  
Supernova Explosions

AbstractFollowing the collapse of their cores, some of the massive binary stars that populate our Universe are expected to form merging binaries composed of black holes and neutron stars. Gravitational-wave observations of the resulting compact binaries can reveal precious details on the inner workings of the supernova mechanism and the subsequent formation of compact objects. Within the framework of the population-synthesis code mobse, we present the implementation of a new supernova model that relies on the compactness of the collapsing star. The model has two free parameters, namely the compactness threshold that separates the formation of black holes and that of neutron stars, and the fraction of the envelope that falls back onto the newly formed black holes. We compare this model extensively against other prescriptions that are commonly used in binary population synthesis. We find that the cleanest signatures of the role of the pre-supernova stellar compactness are (1) the relative formation rates of the different kinds of compact binaries, which mainly depend on the compactness threshold parameter, and (2) the location of the upper edge of the mass gap between the lightest black holes and the heaviest neutron stars, which mainly depends on the fallback fraction.

Realistic models of Globular Clusters with white dwarfs, neutron stars and black holes using GPU supercomputer

2019 ◽  
Vol 15 (S357) ◽  
pp. 206-210
Author(s):  
Bhusan Kayastha ◽  
Long Wang ◽  
Peter Berczik ◽  
Xiaoying Pang ◽  
Manuel Arca Sedda ◽  
...  
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Stellar Evolution ◽  
Globular Clusters ◽  
White Dwarfs ◽  
Cataclysmic Variables ◽  
Compact Objects ◽  
Black Hole Binaries ◽  
Formation And Evolution ◽  
Evolution With Time

AbstractWe present some results from the DRAGON simulations, a set of four direct N-body simulations of globular clusters (GCs) with a million stars and five percent initial (primordial) binaries. These simulations were undertaken with the NBODY6++GPU code, which allowed us to follow dynamical and stellar evolution of individual stars and binaries, formation and evolution of white dwarfs, neutron stars, and black holes, and the effect of a galactic tidal field. The simulations are the largest existing models of a realistic globular cluster over its full lifetime of 12 billion years. In particular we will show here an investigation of the population of binaries including compact objects (such as white dwarfs - cataclysmic variables and merging black hole binaries in the model as counterparts of LIGO/Virgo sources); their distribution in the cluster and evolution with time.

scholarly journals Binary population synthesis with probabilistic remnant mass and kick prescriptions

2020 ◽  
Vol 500 (1) ◽  
pp. 1380-1384
Author(s):  
Ilya Mandel ◽  
Bernhard Müller ◽  
Jeff Riley ◽  
Selma E de Mink ◽  
Alejandro Vigna-Gómez ◽  
...  
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Population Synthesis ◽  
Common Envelope ◽  
Low Mass ◽  
The Common ◽  
The Masses ◽  
The Impact ◽  
Hertzsprung Gap ◽  
Remnant Mass

ABSTRACT We report on the impact of a probabilistic prescription for compact remnant masses and kicks on massive binary population synthesis. We find that this prescription populates the putative mass gap between neutron stars and black holes with low-mass black holes. However, evolutionary effects reduce the number of X-ray binary candidates with low-mass black holes, consistent with the dearth of such systems in the observed sample. We further find that this prescription is consistent with the formation of heavier binary neutron stars such as GW190425, but overpredicts the masses of Galactic double neutron stars. The revised natal kicks, particularly increased ultra-stripped supernova kicks, do not directly explain the observed Galactic double neutron star orbital period–eccentricity distribution. Finally, this prescription allows for the formation of systems similar to the recently discovered extreme mass ratio binary GW190814, but only if we allow for the survival of binaries in which the common envelope is initiated by a donor crossing the Hertzsprung gap, contrary to our standard model.

scholarly journals A binary population synthesis study on gravitational wave sources

2015 ◽  
Vol 11 (A29B) ◽  
pp. 365-366
Author(s):  
Liu Jinzhong ◽  
Zhang Yu
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Gamma Ray ◽  
Theoretical Study ◽  
Compact Objects ◽  
Population Synthesis ◽  
Observational Astronomy ◽  
X Ray ◽  
X Ray Binaries

AbstractGravitational waves (GW) are a natural consequence of Einstein's theory of gravity (general relativity), and minute distortions of space-time. Gravitational Wave Astronomy is an emerging branch of observational astronomy which aims to use GWs to collect observational data about objects such as neutron stars and black holes, about events such as supernovae and about the early universe shortly after the big bang.This field will evolve to become an established component of 21st century multi-messenger astronomy, and will stand shoulder-to-shoulder with gamma-ray, x-ray, optical, infrared and radio astronomers in exploring the cosmos. In this paper, we state a recent theoretical study on GW sources, and present the results of our studies on the field using a binary population synthesis (BPS) approach, which was designed to investigate the formation of many interesting binary-related objects, including close double white dwarfs, AM CVn stars, ultra-compact X-ray binaries(UCXBs), double neutron stars, double stellar black holes. Here we report how BPS can be used to determine the GW radiation from double compact objects.

scholarly journals Population Synthesis of GRB Progenitors: Problems With Kicks

2000 ◽  
Vol 195 ◽  
pp. 339-346
Author(s):  
C. L. Fryer
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Neutron Stars ◽  
Accretion Disks ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Population Synthesis ◽  
Black Hole Accretion ◽  
Black Hole Accretion Disk ◽  
Hole Accretion

Accretion disks around stellar-mass black holes are now thought to be the engines which power classical gamma-ray bursts (GRBs). These disks are formed almost exclusively in binaries, and to study the characteristics of the progenitors of these black-hole accretion disk (BHAD) GRBs, we must understand the uncertainties in binary population synthesis calculations. Kicks imparted onto nascent neutron stars and black holes are among the most misunderstood concepts of binary population synthesis. In this paper, we outline the current understanding (or lack of understanding) of these kicks and discuss their effect on BHAD GRBs and binary population synthesis as a whole.

scholarly journals Properties of Relativistic Linear Stellar Models

1982 ◽  
Vol 69 ◽  
pp. 73-78
Author(s):  
V. Ureche
Keyword(s):  
Black Holes ◽  
Gravitational Field ◽  
Neutron Stars ◽  
Stellar Evolution ◽  
Space Time ◽  
Relativistic Stars ◽  
Strong Gravitational Field ◽  
Stellar Models ◽  
Late Stages

In the late stages of stellar evolution, relativistic objects are formed, such as neutron stars or black holes. These relativistic stars possess a strong gravitational field, therefore their structure and their space-time geometry can be described only in the frame of GRT (Zeldovich and Novikov, 1971; Misner, Thorne and Wheeler, 1973). For this purpose, the following four-dimensional interval is used (spherical gravitational field), (Zeldovich and Novikov, 1971).

Neutron Stars and "Black Holes"

1973 ◽  
Vol 110 (7) ◽  
pp. 441 ◽  
Author(s):  
Ya.B. Zel'dovich
Keyword(s):  
Black Holes ◽  
Neutron Stars
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