Zobrazeno 1 - 10
of 146
pro vyhledávání: '"George B. Field"'
The kinetic energy of supersonic turbulence within interstellar clouds is subject to cooling by dissipation in shocks and subsequent line radiation. The clouds are therefore susceptible to a condensation process controlled by the specific entropy. In
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1eba0394f55158c87fdeb539fd0d3dbc
http://arxiv.org/abs/2001.02678
http://arxiv.org/abs/2001.02678
Autor:
George B. Field
Publikováno v:
Annual Review of Astronomy and Astrophysics. 52:1-42
Here you will find facts about and the opinions of an American astrophysicist who practiced in the second half of the twentieth century. The title explains why I did it. I invented some new ideas, I applied them to some astro objects, I computed thin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db29e3f42f1ac015792a65d6bf466a6d
https://doi.org/10.1146/annurev-astro-081913-040050
https://doi.org/10.1146/annurev-astro-081913-040050
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 385:181-188
We present a model in which the supersonic motions observed in molecular clouds are driven by gravitational energy released as large structures fragment into smaller ones. The fragmentation process begins in large molecular clouds, and continues down
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a47098fa97bf674e0fb0abbecf213b4d
https://doi.org/10.1111/j.1365-2966.2007.12609.x
https://doi.org/10.1111/j.1365-2966.2007.12609.x
Autor:
George B. Field, Eric Keto
Publikováno v:
The Astrophysical Journal. 635:1151-1165
We test the hypothesis that the starless cores may be gravitationally bound clouds supported largely by thermal pressure by comparing observed molecular line spectra to theoretical spectra produced by a simulation that includes hydrodynamics, radiati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9946770e2c723cefa2e8c6cf8c21d666
https://doi.org/10.1086/497566
https://doi.org/10.1086/497566
Autor:
George B. Field, Eric G. Blackman
Publikováno v:
The Astrophysical Journal. 572:685-692
We present a two-scale approximation for the dynamics of a nonlinear $\alpha^2$ dynamo. Solutions of the resulting nonlinear equations agree with the numerical simulations of Brandenburg (2001), and show that $\alpha$ is quenched by the buildup of ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00d2fd1955a78f9478efe8a4d87001e4
https://doi.org/10.1086/340233
https://doi.org/10.1086/340233
Autor:
Eric G. Blackman, George B. Field
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 318:724-732
We show that the presence of a steady $\ao$ dynamo in astrophysical rotators likely leads to an outflow of relative magnetic helicity and thus magnetic energy available for particle acceleration in a corona. The connection between energy and magnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75f785a9fee367c6bfe7de48388aa3e0
https://doi.org/10.1046/j.1365-8711.2000.03830.x
https://doi.org/10.1046/j.1365-8711.2000.03830.x
Autor:
George B. Field, Eric G. Blackman
Publikováno v:
The Astrophysical Journal. 521:597-601
An unsolved problem in turbulent dynamo theory is the ``back reaction'' problem: to what degree does the mean magnetic field suppress the turbulent dynamo coefficients which are needed to drive its growth? The answer will ultimately derive from a com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27946dbb06ef49598c96e6c668513f99
https://doi.org/10.1086/307590
https://doi.org/10.1086/307590
Publikováno v:
The Astrophysical Journal. 518:937-947
Using empirical ion velocity distributions derived from Ultraviolet Coronagraph Spectrometer (UVCS) and Solar Ultraviolet Measurements of Emitted Radiation (SUMER) ultraviolet spectroscopy, we construct theoretical models of the nonequilibrium plasma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::743ee44924eded6a7069c16f99435bc4
https://doi.org/10.1086/307330
https://doi.org/10.1086/307330
Autor:
George B. Field
Publikováno v:
Publications of the Astronomical Society of the Pacific. 110:215-222
Lyman Spitzer, Jr., the Bruce Medalist of the Astronomical Society of the Pacific for 1973, died on 1997 March 31. An intrepid leader, he founded the Princeton Plasma Physics Laboratory and was Principal Investigator on NASA's Copernicus Orbiting Ast
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2447ca1d2a565eb0d8381a06ce04fdd3
https://doi.org/10.1086/316135
https://doi.org/10.1086/316135
Autor:
George B. Field, Tanmay Vachaspati
Publikováno v:
Physical Review Letters. 73:373-376
In the context of electroweak strings, the baryon number anomaly equation may be reinterpreted as a conservation law for baryon number minus helicity. Since the helicity is a sum of the link and twist numbers, linked or twisted loops of electroweak s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccd2dd1a7c896333c2d6088ad1cfea77
https://doi.org/10.1103/physrevlett.73.373
https://doi.org/10.1103/physrevlett.73.373