Interstellar clouds and the formation of stars

@article{Alfvn1977InterstellarCA,  title={Interstellar clouds and the formation of stars},  author={Hannes Alfv{\'e}n and Per Carlqvist},  journal={Astrophysics and Space Science},  year={1977},  volume={55},  pages={487-509},  url={https://api.semanticscholar.org/CorpusID:122687137}}
Part I gives a survey of the drastic revision of cosmic plasma physics which is precipitated by the exploration of the magnetosphere throughin situ measurements. The ‘pseudo-plasma formalism’, which until now has almost completely dominated theoretical astrophysics, must be replaced by an experimentally based approach involving the introduction of a number of neglected plasma phenomena, such as electric double layers, critical velocity, and pinch effect. The general belief that star light is… 

46 Citations

Evolution of the Plasma Universe: II. The Formation of Systems of Galaxies

The model of the plasma universe, inspired by totally unexpected phenomena observed with the advent and application of fully three-dimensional electromagnetic particle-in-cell simulations to…

The $Z$-Pinch Morphology of Supernova 1987A and Electric Stars

Supernova 1987A (SN 1987A) is the closest supernova event since the invention of the telescope. It was first seen in February 1987 in the nearby Large Magellanic Cloud, which is a dwarf companion…

Plasma in laboratory and space

Plasma phenomena are studied in the laboratory, in the magnetospheres, and in more distant astrophysical regions. The basic properties of plasmas are likely to be the same everywhere but the transfer…

Manifestations of electric currents in interstellar molecular clouds

Attention is drawn to filamentary structures in molecular clouds and the existence of subfilaments of sinusoidal shape and also of helix-like structures is pointed out. For two dark clouds, the Lynds…

Stationary Structures in a Four Component Dense Magnetoplasma With Lateral Perturbations

We considered a dense plasma containing electrons, positrons, ions and dust particles in background magnetic and gravitational fields alongside collisional effects for the heavier species (ions and…

HIGH-RESOLUTION OBSERVATIONS AND THE PHYSICS OF HIGH-VELOCITY CLOUD A0

The neutral hydrogen structure of high-velocity cloud A0 (at about −180 km s−1) has been mapped with a 9.′1 resolution. Gaussian decomposition of the profiles is used to separately map families of…

Accretion and Current Discs Controlled by Strong Magnetic Field

In the presence of a strong magnetic field, accretion discs surrounding neutron stars, black holes, and white dwarfs have their inner edges at their Alfven radii, i.e., at the distance where magnetic…

On the evolution of interacting, magnetized, galactic plasmas

The advent of three-dimensional, electromagnetic, and fully relativistic particle simulations allows a detailed study of a magnetized, rotating plasma, galaxy model. When two such models are…

Location of the Inner Edges of Astrophysical Discs Related to the Central Object

The accreting ionized gas surrounding a neutron star or white dwarf creates an accretion disc. Radius R A (the Alfven radius), where the magnetic energy density is equal to the kinetic energy density…

27 References

Processes in Collapsing Interstellar Clouds

The study of dense interstellar clouds that collapse gravitationally to form stars is still an embryonic field of astrophysics, but one that seems likely to play an increasingly important role in…

Unified formation of astronomical objects up to stellar mass range

In dense interstellar clouds or in the surroundings of just-formed stars, the larger grains form proto-cores by segregating from the gas under the influence of the gravitational field of the cloud…

Electric currents in cosmic plasmas

Since the beginning of the century, physics has been dualistic in the sense that some phenomena are described by a field concept and others by a particle concept. This dualism is essential also in…

Problems related to macroscopic electric fields in the magnetosphere

The macroscopic electric fields in the magnetosphere originate from internal as well as external sources. The fields are intimately coupled with the dynamics of magnetospheric plasma convection. They…

Laboratory experiments of magnetospheric interest

Space-related laboratory experiments can play an important role as a complement to observations and active experiments in the magnetosphere. Excluding laboratory experiments for mere developing or…

Heliographic latitude dependence of the dominant polarity of the interplanetary magnetic field

The measurements of the interplanetary magnetic field taken with the Mariners 2, 4, and 5, and OGO 5 cover several parts of the interval from September 1962 to the present and several paths through…

Solar flares and solar wind helium enrichments: July 1965–July 1967

It has previously been suggested that the very high relative abundances of helium occasionally observed in the solar wind mark the plasma accelerated by major solar flares. To confirm this…

Waves and instabilities in the solar wind

We present a review of waves and instabilities in the solar wind, concentrating on those aspects that are likely to play important roles in influencing the dynamic and thermodynamic states of the…

Review of the critical velocity of gas-plasma interaction

A review is given of the experimental investigations concerning the critical velocity of the interaction between a neutral gas and a plasma in relative motion. In most of the experiments this…

Large-Amplitude Alfvn Waves in the Interplanetary Medium'

An extensive study of the dynamic nonshock properties of the microscale fluctuations (scale lengths of 0.01 AU and less) in the interplanetary medium was made by using plasma and magnetic field data…

Related Papers

Showing 1 through 3 of 0 Related Papers