Physical Conditions in Faint Gigahertz-Peaked Spectrum Radio Sources

Details Physical Conditions in Faint Gigahertz-Peaked Spectrum Radio Sources Physical Conditions in Faint Gigahertz-Peaked Spectrum Radio Sources

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..428t&link_type=abstract

Astronomy Reports, Volume 45, Issue 6, June 2001, pp.428-433

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Weak, compact radio sources (˜100 mJy peak flux, L˜1 10 pc) with their spectral peaks at about a gigahertz are studied, based on the complete sample of 46 radio sources of Snellen, drawn from high-sensitivity surveys, including the low-frequency Westerbork catalog. The physical parameters have been estimated for 14 sources: the magnetic field (H ⊥), the number density of relativistic particles (n e), the energy of the magnetic field , and the energy of relativistic particles (E e). Ten sources have &
$E_{H_ bot } ≪ E_e
; , three have approximate equipartition of the energies &
(E_{H_ bot } ˜ E_e )
; , and only one has &
E_{H_ bot } ≫ E_e
; . The mean magnetic fields in quasars (10-3 G) and galaxies (10-2 G) have been estimated. The magnetic field appears to be related to the sizes of compact features as &
H ˜ 1/sqrt L $
; .

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