The radio structure of 3C 309.1 determined by multi-baseline interferometry

Details The radio structure of 3C 309.1 determined by multi-baseline interferometry The radio structure of 3C 309.1 determined by multi-baseline interferometry

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194..527k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 194, Feb. 1981, p. 527-535.

Astronomy and Astrophysics

Astronomy

22

Quasars, Radio Astronomy, Very Long Base Interferometry, Astronomical Maps, Microwave Spectra, Relativistic Effects

Scientific paper

Hybrid maps of the radio structure of the QSO 3C 309.1 at 1666 MHz are presented from observations with the European VLBI network and with radio-linked interferometers at Jodrell Bank. The maps reveal that 3C 309.1 has a triple structure with a dominant compact self-absorbed core, extended in pa 162 deg + or - 2 deg; symmetrically disposed on either side of this core are two relatively extended outer lobes defining an overall pa of about 90 deg. This sharp change in position angle from milliarcsec to the arcsec scale is also seen in many of the asymmetric, core-dominated (D2) quasars, and thus 3C 309.1 is intermediate in its properties between the symmetric (D1) and the D2 classes. The 3C 309.1 may be a D1 quasar observed nearly end-on, with a relativistically enhanced nuclear core.

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