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Infrared polarimetry of the nucleus of Centaurus A: the nearest blazar

Abstract

As one of the nearest examples of an active galaxy, NGC5128 (Centaurus A) has been studied in detail over a wide range of wavelengths. The authors have made polarization observations of the infrared nucleus at wavelengths from 1.2 to 3.8 ..mu..m. The nucleus is found to have a large intrinsic polarization of approx.=9% at position angle 147/sup 0/. This position angle is perpendicular to the direction of the X-ray and radio jet. The polarized emission from the nucleus is interpreted as synchrotron radiation from a region whose magnetic field is parallel to the jet direction. The properties of the Cen A nucleus are essentially identical to those of the much more luminous blazars. This suggest that blazar-type activity extends over a very wide range in luminosity, and low-luminosity blazars may be common in elliptical galaxies.
Publication Date:
Jul 10, 1986
Product Type:
Journal Article
Reference Number:
GBN-86-003966; EDB-87-182606
Resource Relation:
Journal Name: Nature (London); (United Kingdom); Journal Volume: 322:6075
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GALAXY NUCLEI; INFRARED RADIATION; POLARIZATION; BL LACERTAE OBJECTS; EMISSION; EXPERIMENTAL DATA; GALAXIES; SYNCHROTRON RADIATION; BREMSSTRAHLUNG; COSMIC RADIO SOURCES; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; NUMERICAL DATA; RADIATIONS; 640105* - Astrophysics & Cosmology- Galaxies
OSTI ID:
5869646
Research Organizations:
Anglo-Australian Observatory, Epping, Australia; Sussex Univ., Brighton, UK. Astronomy Centre; Hatfield Polytechnic, GB. Dept. of Physics; Nuffield Radio Astronomy Labs., Jodrell Bank, UK
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NATUA
Submitting Site:
GBN
Size:
Pages: 150-151
Announcement Date:
Dec 01, 1987

Citation Formats

Bailey, J, Sparks, W B, Hough, J H, and Axon, D J. Infrared polarimetry of the nucleus of Centaurus A: the nearest blazar. United Kingdom: N. p., 1986. Web. doi:10.1038/322150a0.
Bailey, J, Sparks, W B, Hough, J H, & Axon, D J. Infrared polarimetry of the nucleus of Centaurus A: the nearest blazar. United Kingdom. https://doi.org/10.1038/322150a0
Bailey, J, Sparks, W B, Hough, J H, and Axon, D J. 1986. "Infrared polarimetry of the nucleus of Centaurus A: the nearest blazar." United Kingdom. https://doi.org/10.1038/322150a0.
@misc{etde_5869646,
title = {Infrared polarimetry of the nucleus of Centaurus A: the nearest blazar}
author = {Bailey, J, Sparks, W B, Hough, J H, and Axon, D J}
abstractNote = {As one of the nearest examples of an active galaxy, NGC5128 (Centaurus A) has been studied in detail over a wide range of wavelengths. The authors have made polarization observations of the infrared nucleus at wavelengths from 1.2 to 3.8 ..mu..m. The nucleus is found to have a large intrinsic polarization of approx.=9% at position angle 147/sup 0/. This position angle is perpendicular to the direction of the X-ray and radio jet. The polarized emission from the nucleus is interpreted as synchrotron radiation from a region whose magnetic field is parallel to the jet direction. The properties of the Cen A nucleus are essentially identical to those of the much more luminous blazars. This suggest that blazar-type activity extends over a very wide range in luminosity, and low-luminosity blazars may be common in elliptical galaxies.}
doi = {10.1038/322150a0}
journal = []
volume = {322:6075}
journal type = {AC}
place = {United Kingdom}
year = {1986}
month = {Jul}
}