Results 71 to 80 of about 1,271 (117)

On the Physical Condition of the Supernovae. [PDF]

open access: yesProc Natl Acad Sci U S A, 1936
Gaposchkin CP.
europepmc   +1 more source

Synthetic Spectra for Supernovae. [PDF]

open access: yesProc Natl Acad Sci U S A, 1940
Payne-Gaposchkin C, Whipple FL.
europepmc   +1 more source

Electrodynamical synchronization of AM Herculis-type stars

open access: closedAstrophysics and Space Science, 1986
A new mechanism is proposed for the explanation of synchronous rotations in AM Herculis-type binaries. In contrast to the resistive mechanism of Josset al. (1979), our model predicts that an asynchronous rotation, if it is present, damps exponentially and the damping time is inversely proportional to the electrical conductivity.
Osamu Kaburaki
  +4 more sources

Polarized Radiation from AM Herculis Stars

open access: closedInternational Astronomical Union Colloquium, 1983
ABSTRACTCalculations of polarized cyclotron radiation from magnetized hot plasmas are modified to include the effects of collisions and photon scattering. These effects produce a general reduction in both the linear and circular polarization. The background unpolarized flux which had previously been invoked, in an ad hoc manner for the collisionless ...
P. E. Barrett, G. Chanmugam
  +4 more sources

AM Herculis Stars

open access: closed, 2018
The AM Herculis binaries have white dwarf primary stars with the strongest magnetic fields observed in the cataclysmic variables. They are unique in having no accretion discs and primary stars rotating in synchronism with the orbit. The accretion stream becomes magnetically channelled and reaches the primary by one or more localized columns.
C. G. Campbell
openaire   +2 more sources

Characteristics of the AM Herculis Type Stars and Review of proposed Interpretations

open access: closedInternational Astronomical Union Colloquium, 1979
Consider a close binary system where mass transfer is underway from a relatively normal star to a highly magnetic degenerate dwarf. The magnetic field is strong enough that the magnetic pressure balances the ram pressure of the infalling plasma at a distance comparable with the separation of the two stars.
S. Tapia
openaire   +2 more sources

Accretion in AM Herculis Stars

open access: closed, 1990
The optical continua of magnetic cataclysmic binaries (AM Herculis stars) are formed by cyclotron radiation in the hot accretion plasmas. Phase-resolved low-resolution spectrophotometry is one of the most important diagnostic tools to investigate the properties of cyclotron radiation.
A. Schwope
openaire   +2 more sources

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