Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aj....109...81u&link_type=abstract
The Astronomical Journal (ISSN 0004-6256), vol. 109, no. 1669, p. 81-86
Astronomy and Astrophysics
Astronomy
61
Optical Polarization, Radio Astronomy, Radio Observation, Seyfert Galaxies, Spectral Line Width, Astronomical Polarimetry, Astronomical Spectroscopy, Ionization, Polarimeters, Very Large Array (Vla)
Scientific paper
We have observed seven narrow-lined Seyfert 1 (NLS1) galaxies and one high-ionization Seyfert 2 galaxy with the Very Large Array (VLA). Combining these observations with published data, we summarize the radio properties of the NLS1 galaxies for which spectropolarimetry was reported by Goodrich. Fifteen of these 17 objects now have published radio observations of high sensitivity, and only nine of those have been detected. For a Hubble parameter of 75 km/s/Mpc, the 6 cm radio powers range from 1020 to 1023 W/Hz, within the range previously found for other types of Seyfert galaxy. The median radio size of the nine VLA-detected galaxies is no larger than 300 pc, similar to the median size found by Ulvestad & Wilson for a distance-limited sample of Seyfert galaxies. Of the six NLS1 galaxies known to have significant intrinsic optical polarization, three have measurable radio axes. Two of those three galaxies have radio major axes close to 90 deg from their polarization position angles, while the third has an inner radio axis that may be nearly parallel to the polarization position angle. The former relationship is expected for a Seyfert 1 in a unified model of Seyfert galaxies, assuming no intrinsic continuum polarization.
Antonucci Robert R. J.
Goodrich Robert W.
Ulvestad James S.
No associations
LandOfFree
Radio properties of narrow-lined Seyfert 1 galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Radio properties of narrow-lined Seyfert 1 galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio properties of narrow-lined Seyfert 1 galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1818308