Empirical Determinations of Key Physical Parameters Related to Classical Double Radio Sources | Zendy

Lin Wan | Zendy; Ruth A. Daly | Zendy; E. J. Guerra | Zendy

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Empirical Determinations of Key Physical Parameters Related to Classical Double Radio Sources

Author(s) -

Lin Wan,

Ruth A. Daly,

E. J. Guerra

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/317218

Subject(s) - physics , radio galaxy , astrophysics , galaxy , radio frequency , x shaped radio galaxy , active galactic nucleus , astronomy , telecommunications , computer science

Multi-frequency radio observations of the radio bridge of powerful classicaldouble radio sources can be used to determine: the beam power of the jetsemanating from the AGN; the total time the source will actively produce jetsthat power large-scale radio emission; the thermal pressure of the medium inthe vicinity of the radio source; and the total mass, including dark matter, ofthe galaxy or cluster of galaxies traced by the ambient gas that surrounds theradio source. The theoretical constructs that allow a determination of each ofthese quantities using radio observations are presented and discussed.Empirical determinations of each of these quantities are obtained and analyzed.A sample of 14 radio galaxies and 8 radio loud quasars with redshifts betweenzero and two for which there is enough radio information to be able todetermine the physical parameters listed above was studied in detail.(abridged)Comment: Submitted to ApJ, LaTex, 26 total pages of text which includes captions & two tables, plus 13 EPS figures & 1 tabl

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