scholarly journals The stellar mass spectrum in warm and dusty gas: deviations from Salpeter in the Galactic centre and in circumnuclear starburst regions

2007 ◽  
Vol 374 (1) ◽  
pp. L29-L33 ◽  
Author(s):  
R. S. Klessen ◽  
M. Spaans ◽  
A.-K. Jappsen
Keyword(s):  
Mass Spectrum ◽  
Stellar Mass ◽  
Galactic Centre ◽  
Dusty Gas ◽  
Starburst Regions

On Coagulation and the Stellar Mass Spectrum

1995 ◽  
Vol 452 ◽  
pp. 652 ◽  
Author(s):  
Eric J. Allen ◽  
Pierre Bastien
Keyword(s):  
Mass Spectrum ◽  
Stellar Mass

scholarly journals Observational evidence for stellar-mass black holes

2006 ◽  
Vol 2 (S238) ◽  
pp. 3-12 ◽  
Author(s):  
Jorge Casares
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Mass Spectrum ◽  
Radial Velocity ◽  
Stellar Mass ◽  
Observational Evidence ◽  
X Ray ◽  
History Of ◽  
X Ray Binaries ◽  
Dynamical Masses

AbstractRadial velocity studies of X-ray binaries provide the most solid evidence for the existence of stellar-mass black holes. We currently have 20 confirmed cases, with dynamical masses in excess of 3 M⊙. Accurate masses have been obtained for a subset of systems which gives us a hint at the mass spectrum of the black hole population. This review summarizes the history of black hole discoveries and presents the latest results in the field.

scholarly journals Ultralight bosons for strong gravity applications from simple Standard Model extensions

2021 ◽  
Vol 2021 (12) ◽  
pp. 047
Author(s):  
Felipe F. Freitas ◽  
Carlos A.R. Herdeiro ◽  
António P. Morais ◽  
António Onofre ◽  
Roman Pasechnik ◽  
...  
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Mass Spectrum ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Mass Range ◽  
Stellar Mass ◽  
Compact Objects ◽  
The Standard Model

Abstract We construct families, and concrete examples, of simple extensions of the Standard Model that can yield ultralight real or complex vectors or scalars with potential astrophysical relevance. Specifically, the mass range for these putative fundamental bosons (∼ 10-10-10-20 eV) would lead dynamically to both new non-black hole compact objects (bosonic stars) and new non-Kerr black holes, with masses of ∼ M⊙ to ∼ 1010 M⊙, corresponding to the mass range of astrophysical black hole candidates (from stellar mass to supermassive). For each model, we study the properties of the mass spectrum and interactions after spontaneous symmetry breaking, discuss its theoretical viability and caveats, as well as some of its potential and most relevant phenomenological implications linking them to the physics of compact objects.

scholarly journals The stellar mass spectrum from non-isothermal gravoturbulent fragmentation

2005 ◽  
Vol 435 (2) ◽  
pp. 611-623 ◽  
Author(s):  
A.-K. Jappsen ◽  
R. S. Klessen ◽  
R. B. Larson ◽  
Y. Li ◽  
M.-M. Mac Low
Keyword(s):  
Mass Spectrum ◽  
Stellar Mass

The stellar mass spectrum of the open cluster NGC 3293

2007 ◽  
Vol 312 (3-4) ◽  
pp. 171-187 ◽  
Author(s):  
Robert W. Slawson ◽  
Zoran Ninkov ◽  
Elliott P. Horch
Keyword(s):  
Mass Spectrum ◽  
Open Cluster ◽  
Stellar Mass

scholarly journals Some processes influencing the stellar initial mass function

1991 ◽  
Vol 147 ◽  
pp. 261-273
Author(s):  
Richard B. Larson
Keyword(s):  
Mass Spectrum ◽  
Power Law ◽  
Massive Stars ◽  
Mass Function ◽  
Stellar Mass ◽  
Initial Mass Function ◽  
Initial Mass ◽  
Current Evidence ◽  
Solar Mass ◽  
Stellar Initial Mass Function

Current evidence suggests that the stellar initial mass function has the same basic form everywhere, and that its fundamental features are (1) the existence of a characteristic stellar mass of order one solar mass, and (2) the existence of an apparently universal power-law form for the mass spectrum of the more massive stars. The characteristic stellar mass may be determined in part by the typical mass scale for the fragmentation of star forming clouds, which is predicted to be of the order of one solar mass. The power-law extension of the mass spectrum toward higher masses may result from the continuing accretional growth of some stars to much larger masses; the fact that the most massive stars appear to form preferentially in cluster cores suggests that such continuing accretion may be particularly important at the centers of clusters. Numerical simulations suggest that forming systems of stars may tend to develop a hierarchical structure, possibly self-similar in nature. If most stars form in such hierarchically structured systems, and if the mass of the most massive star that forms in each subcluster increases as a power of the mass of the subcluster, then a mass spectrum of power-law form is predicted. Some possible physical effects that could lead to such a relation are briefly discussed, and some observational tests of the ideas discussed here are proposed.

scholarly journals Stellar mass primordial black holes as cold dark matter

2020 ◽  
Vol 496 (1) ◽  
pp. 60-66
Author(s):  
J L G Sobrinho ◽  
P Augusto
Keyword(s):  
Phase Transition ◽  
Black Holes ◽  
Dark Matter ◽  
Mass Spectrum ◽  
Cold Dark Matter ◽  
Stellar Mass ◽  
Density Fluctuations ◽  
Primordial Black Holes ◽  
Qcd Phase Transition ◽  
The Universe

ABSTRACT Primordial black holes (PBHs) might have formed in the early Universe due to the collapse of density fluctuations. PBHs may act as the sources for some of the gravitational waves recently observed. We explored the formation scenarios of PBHs of stellar mass, taking into account the possible influence of the QCD phase transition, for which we considered three different models: crossover model, bag model, and lattice fit model. For the fluctuations, we considered a running-tilt power-law spectrum; when these cross the ∼10−9–10−1 s Universe horizon they originate 0.05–500 M⊙ PBHs that could (i) provide a population of stellar mass PBHs similar to the ones present on the binaries associated with all-known gravitational wave sources and (ii) constitute a broad-mass spectrum accounting for ${\sim}76{{\ \rm per\ cent}}$ of all cold dark matter in the Universe.

scholarly journals Accretion and the stellar mass spectrum in small clusters

1997 ◽  
Vol 285 (1) ◽  
pp. 201-208 ◽  
Author(s):  
I. A. Bonnell ◽  
M. R. Bate ◽  
C. J. Clarke ◽  
J. E. Pringle
Keyword(s):  
Mass Spectrum ◽  
Stellar Mass ◽  
Small Clusters
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