Evidence for Ordered Magnetic Fields in the Quasar Environment | Zendy

P. S. Udomprasert | Zendy; G. B. Taylor | Zendy; T. J. Pearson | Zendy; D. H. Roberts | Zendy

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Evidence for Ordered Magnetic Fields in the Quasar Environment

Author(s) -

P. S. Udomprasert,

G. B. Taylor,

T. J. Pearson,

D. H. Roberts

Publication year - 1997

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 - 10.1086/310725

Subject(s) - quasar , physics , astrophysics , supermassive black hole , polarization (electrochemistry) , rest frame , magnetic field , very long baseline array , interferometry , very long baseline interferometry , astronomy , galaxy , redshift , chemistry , quantum mechanics

At a distance of 20 pc from the purported supermassive black hole poweringquasars, temperatures and densities are inferred from optical observations tobe ~10**4 K and ~10**4 cm**-3. Here we present Very Long BaselineInterferometry radio observations revealing organized magnetic fields on theparsec scale in the hot plasma surrounding the quasar OQ172 (1442+101). Thesemagnetic fields rotate the plane of polarization of the radio emission comingfrom the core and inner jet of the quasar. The derived rotation measure (RM) is40,000 rad m**-2 in the rest frame of the quasar. Only 10 mas (a projecteddistance of 68 pc) from the nucleus the jet absolute values of RM fall to lessthan 100 rad m**-2.Comment: in press at ApJ Letters, 12 page LaTeX document includes 4 postscript figure

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