Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii
Department of Space and Astronautical Science, The Graduate University for Advanced Studies, 3-1-1 Yoshinodai, Chuou-ku, Sagamihara, Kanagawa 252-0222, Japan
The Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuou-ku, Sagamihara, Kanagawa 252-5210, Japan
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Institute of Astronomy & Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 10617, Taiwan
Author to whom correspondence should be addressed.
Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad
Received: 6 September 2016 / Revised: 23 November 2016 / Accepted: 14 December 2016 / Published: 20 December 2016
We report the jet width profile of of the nearby (
) AGN NGC 4261 for both the approaching jet and the counter jet at radial distances ranging from
Schwarzschild radius (
) from the central engine. Our Very Large Array (VLA) and Very Long Baseline Array (VLBA) observations reveal that the jets maintain a conical structure on both sides over the range
without any structural transition (i.e., parabolic to conical) like in the approaching jet in M87. Thus, NGC 4261 will provide a unique opportunity to examine the conical jet hypothesis in blazars, while it may require some additional consideration on the acceleration and collimation process in AGN jets.
This is an open access article distributed under the Creative Commons Attribution License
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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MDPI and ACS Style
Nakahara, S.; Doi, A.; Murata, Y.; Hada, K.; Nakamura, M.; Asada, K. Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii. Galaxies 2016, 4, 80.
Nakahara S, Doi A, Murata Y, Hada K, Nakamura M, Asada K. Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii. Galaxies. 2016; 4(4):80.
Nakahara, Satomi; Doi, Akihiro; Murata, Yasuhiro; Hada, Kazuhiro; Nakamura, Masanori; Asada, Keiichi. 2016. "Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii." Galaxies 4, no. 4: 80.
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