Interstellar clouds and the formation of stars

  title={Interstellar clouds and the formation of stars},
  author={H. Alfv{\'e}n and P. Carlqvist},
  journal={Astrophysics and Space Science},
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… Expand
Evolution of the Plasma Universe: II. The Formation of Systems of Galaxies
  • A. Peratt
  • Physics
  • IEEE Transactions on Plasma Science
  • 1986
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 toExpand
Origin of solar system
As the theory of the origin and evolution of the solar system should constitute the general background for the science of planetary interiors, I give a summary of some of the main problems in thisExpand
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 companionExpand
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 transferExpand
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 LyndsExpand
The physics of double layers and their role in astrophysics
Abstract Research on electrostatic double layers (DLs) is surveyed and astrophysical applications are reviewed. Strong highly relativistic DLs directly accelerate equal numbers of ions and electrons,Expand
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) has been mapped with a 9.1 arcmin resolution. Gaussian decomposition of the profiles is used to separately map familiesExpand
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 magneticExpand
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 areExpand
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 densityExpand


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 inExpand
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 cloudExpand
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 inExpand
On the Theory of Magnetic Storms and Aurorae
A. Chapman-Ferraro's theory of magnetic storms is discussed. It is pointed out that the fundamental assumption about a non-magnetized beam is in conflict with cosmic ray evidence. It is further shownExpand
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 orExpand
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 throughExpand
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 thisExpand
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 theExpand
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 thisExpand
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 dataExpand