Masses, radii, and magnetic fields of pulsating X-ray sources - Is the 'standard' model self-consistent

1983 ◽  
Vol 265 ◽  
pp. 1036 ◽  
Author(s):  
I. Wasserman ◽  
S. L. Shapiro
Keyword(s):  
Magnetic Fields ◽  
Standard Model ◽  
X Ray ◽  
The Standard Model ◽  
Self Consistent

scholarly journals Flattening the inflaton potential beyond minimal gravity

2018 ◽  
Vol 168 ◽  
pp. 06001 ◽  
Author(s):  
Hyun Min Lee
Keyword(s):  
Standard Model ◽  
Higgs Field ◽  
Gravity Models ◽  
Induced Gravity ◽  
Consistent Description ◽  
The Standard Model ◽  
Self Consistent ◽  
The Status

We review the status of the Starobinsky-like models for inflation beyond minimal gravity and discuss the unitarity problem due to the presence of a large non-minimal gravity coupling. We show that the induced gravity models allow for a self-consistent description of inflation and discuss the implications of the inflaton couplings to the Higgs field in the Standard Model.

scholarly journals The Origin of Millisecond Pulsars

1996 ◽  
Vol 160 ◽  
pp. 547-556 ◽  
Author(s):  
Dipankar Bhattacharya
Keyword(s):  
Standard Model ◽  
Millisecond Pulsar ◽  
Millisecond Pulsars ◽  
X Ray ◽  
Additional Argument ◽  
The Standard Model ◽  
Low Mass ◽  
Pulsar Populations ◽  
X Ray Binaries ◽  
Kinematic Properties

AbstractAccording to the standard model, millisecond pulsars are the descendants of low-mass X-ray binaries (LMXB). The importance of this formation route has, however, been questioned by several authors on different grounds. This paper critically reviews the arguments and assumptions underlying the standard model. The kinematic properties of the LMXB and millisecond pulsar populations are compared, and are found to be compatible. This provides an additional argument in favour of the standard model.

Quadratic helicity and cosmological magnetic fields

2020 ◽  
Vol 17 (10) ◽  
pp. 2050137
Author(s):  
Peter Akhmet’ev ◽  
Diego Julio Cirilo-Lombardo ◽  
Alexandr Smirnov
Keyword(s):  
Magnetic Fields ◽  
Standard Model ◽  
Mathematical Description ◽  
The Standard Model ◽  
Points Of View

In this work, the quadratic helicity [Formula: see text] is discussed from the physical and topological points of view. We show, after the introduction of a mathematical description of the properties of helicity and quadratic helicity in the context of standard dynamo equations, examples of the importance of these high invariants in cosmological scenarios. These scenarios consider extensions of the standard model and extensions of GR.

scholarly journals Long-Range Magnetic Fields in the Ground State of the Standard Model Plasma

2012 ◽  
Vol 109 (11) ◽  
Author(s):  
Alexey Boyarsky ◽  
Oleg Ruchayskiy ◽  
Mikhail Shaposhnikov
Keyword(s):  
Magnetic Fields ◽  
Standard Model ◽  
Long Range ◽  
Ground State ◽  
The Standard Model

scholarly journals Magnetizing the Cosmic Web during Reionization

Galaxies ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 124 ◽  
Author(s):  
Mathieu Langer ◽  
Jean-Baptiste Durrive
Keyword(s):  
Magnetic Fields ◽  
Standard Model ◽  
Intergalactic Medium ◽  
Classical Physics ◽  
The Standard Model ◽  
Magnetic Seeds ◽  
The Universe

Increasing evidence suggests that cosmological sheets, filaments, and voids may be substantially magnetized today. The origin of magnetic fields in the intergalactic medium (IGM) is, however, currently uncertain. It seems well known that non-standard extensions to the physics of the standard model can provide mechanisms susceptible of magnetizing the universe at large. Perhaps less well known is the fact that standard, classical physics of matter–radiation interactions actually possesses the same potential. We discuss a magnetogenesis mechanism based on the exchange of momentum between hard photons and electrons in an inhomogeneous IGM. Operating in the neighborhood of ionizing sources during the epoch of reionization, this mechanism is capable of generating magnetic seeds of relevant strengths over scales comparable to the distance between ionizing sources. In addition, summing up the contributions of all ionizing sources and taking into account the distribution of gas inhomogeneities, we show that this mechanism leaves the IGM, at the end of reionization, with a level of magnetization that might account, when amplification mechanisms take over, for the magnetic fields strengths in the current cosmic web.

scholarly journals Testing the Paradigm of Low Mass Star Formation

2004 ◽  
Vol 221 ◽  
pp. 201-212
Author(s):  
Lee Hartmann
Keyword(s):  
Star Formation ◽  
Magnetic Fields ◽  
Standard Model ◽  
Molecular Clouds ◽  
Class I ◽  
Stellar Systems ◽  
Mass Star ◽  
Core Formation ◽  
The Standard Model ◽  
Low Mass

Protostellar core formation is probably much more dynamic, and magnetic fields are probably much less important, than has been previously assumed in the standard model of low-mass star formation. This revised picture has important consequences: it is easier to understand the observed rapidity of star formation in molecular clouds; cores are more likely to have structures favoring high infall rates at early times, helping to explain the differences between Class 0 and Class I protostars; and core structure and asymmetry will strongly favor post-collapse fragmentation into binary and multiple stellar systems.

scholarly journals The Mopra DQS survey of the G333 region

2006 ◽  
Vol 2 (S237) ◽  
pp. 404-404
Author(s):  
M. R. Cunningham ◽  
I. Bains ◽  
N. Lo ◽  
T. Wong ◽  
M. G. Burton ◽  
...  
Keyword(s):  
Star Formation ◽  
Magnetic Fields ◽  
Standard Model ◽  
Molecular Clouds ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Star Forming ◽  
Successful Model ◽  
The Standard Model ◽  
Forming Efficiency

Any successful model of star formation must be able to explain the low star forming efficiency of molecular clouds in our Galaxy. If the collapse of gas is regulated only by gravity, then the star formation rate should be orders of magnitude larger than the 1 M per year within our galaxy. The standard model invokes magnetic fields to slow down the rate of collapse, but does not explain star formation in cluster mode, or the lack of observed variations in the chemistry of molecular clouds if they are long-lived entities.

scholarly journals Sterile neutrino dark matter from freeze-in

2016 ◽  
Vol 31 (06) ◽  
pp. 1630005 ◽  
Author(s):  
Bibhushan Shakya
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Sterile Neutrino ◽  
Thermal Bath ◽  
Beyond The Standard Model ◽  
Production Mechanism ◽  
X Ray ◽  
The Standard Model ◽  
Gradual Accumulation ◽  
Characteristic Features

A sterile neutrino is a well-motivated and widely studied dark matter (DM) candidate. The most straightforward realization of sterile neutrino DM, through the Dodelson–Widrow (DW) mechanism, is now ruled out by a combination of X-ray and Lyman-[Formula: see text] measurements. An alternative production mechanism that is becoming increasingly popular in the literature is the freeze-in mechanism, involving frameworks where a feeble coupling to a particle — usually a scalar beyond the Standard Model — in the thermal bath results in a gradual accumulation of the sterile neutrino DM abundance. This paper reviews the various motivations for realizing such frameworks in the literature, their common characteristic features and phenomenological signatures.

scholarly journals Propagators of charged particles in an external magnetic field, expanded over Landau levels

2015 ◽  
Vol 30 (24) ◽  
pp. 1550140 ◽  
Author(s):  
A. V. Kuznetsov ◽  
A. A. Okrugin ◽  
A. M. Shitova
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Standard Model ◽  
Constant Magnetic Field ◽  
Charged Particles ◽  
Landau Levels ◽  
The Standard Model ◽  
First Time

Various forms of expressions for the propagators of charged particles in a constant magnetic field that should be used for investigations of electroweak processes in an external uniform magnetic fields are discussed. Formulas for the propagators of the Standard Model charged [Formula: see text]- and scalar [Formula: see text]-bosons in an arbitrary [Formula: see text]-gauge, expanded over Landau levels, are derived for the first time.

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