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Title: MULTI-FREQUENCY POLARIMETRY TOWARD S5 0836+710: A POSSIBLE SPINE-SHEATH STRUCTURE FOR THE JET

Abstract

We perform multi-frequency polarimetry toward 0836+710 using data from the Very Long Baseline Array. These observations allow us to measure both the distributions of the polarization position angle and the Faraday rotation measure (RM). We find a systematic gradient in the RM distribution as has been reported in several observations of relativistic jets emanating from active galactic nuclei. The RM corresponds to the line-of-sight component of the magnetic field. Thus, a systematic gradient of the RM along the transverse direction of the jet implies the existence of helical magnetic components associated with the jet itself. We derive the pitch angle of the helical magnetic field independently from the distribution of the projected magnetic field and from the RM data. Their discrepancies can be understood in a spine/sheath structure of the jet.

Authors:
;  [1];  [2];  [3];  [4]
  1. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 (Japan)
  2. Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States)
  3. Institute of Astronomy and Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan (China)
  4. Department of Physics, Faculty of Science, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065 (Japan)
Publication Date:
OSTI Identifier:
21460154
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 720; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/720/1/41; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; FARADAY EFFECT; GALAXIES; GALAXY NUCLEI; INCLINATION; MAGNETIC FIELDS; POLARIMETRY; POLARIZATION; QUASARS; RELATIVISTIC RANGE; COSMIC RADIO SOURCES; ENERGY RANGE

Citation Formats

Asada, Keiichi, Nagai, Hiroshi, Nakamura, Masanori, Inoue, Makoto, and Kameno, Seiji. MULTI-FREQUENCY POLARIMETRY TOWARD S5 0836+710: A POSSIBLE SPINE-SHEATH STRUCTURE FOR THE JET. United States: N. p., 2010. Web. doi:10.1088/0004-637X/720/1/41.
Asada, Keiichi, Nagai, Hiroshi, Nakamura, Masanori, Inoue, Makoto, & Kameno, Seiji. MULTI-FREQUENCY POLARIMETRY TOWARD S5 0836+710: A POSSIBLE SPINE-SHEATH STRUCTURE FOR THE JET. United States. doi:10.1088/0004-637X/720/1/41.
Asada, Keiichi, Nagai, Hiroshi, Nakamura, Masanori, Inoue, Makoto, and Kameno, Seiji. Wed . "MULTI-FREQUENCY POLARIMETRY TOWARD S5 0836+710: A POSSIBLE SPINE-SHEATH STRUCTURE FOR THE JET". United States. doi:10.1088/0004-637X/720/1/41.
@article{osti_21460154,
title = {MULTI-FREQUENCY POLARIMETRY TOWARD S5 0836+710: A POSSIBLE SPINE-SHEATH STRUCTURE FOR THE JET},
author = {Asada, Keiichi and Nagai, Hiroshi and Nakamura, Masanori and Inoue, Makoto and Kameno, Seiji},
abstractNote = {We perform multi-frequency polarimetry toward 0836+710 using data from the Very Long Baseline Array. These observations allow us to measure both the distributions of the polarization position angle and the Faraday rotation measure (RM). We find a systematic gradient in the RM distribution as has been reported in several observations of relativistic jets emanating from active galactic nuclei. The RM corresponds to the line-of-sight component of the magnetic field. Thus, a systematic gradient of the RM along the transverse direction of the jet implies the existence of helical magnetic components associated with the jet itself. We derive the pitch angle of the helical magnetic field independently from the distribution of the projected magnetic field and from the RM data. Their discrepancies can be understood in a spine/sheath structure of the jet.},
doi = {10.1088/0004-637X/720/1/41},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 720,
place = {United States},
year = {2010},
month = {9}
}