Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 103–109 Schwarzschild Radii

doi:10.3390/galaxies4040080

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Doi, A
Murata, Y
Hada, K
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Asada, K

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Hada, K
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Open AccessArticle

Galaxies 2016, 4(4), 80; doi:10.3390/galaxies4040080

Conical Stream of the Two-Sided Jets in NGC 4261 over the Range of 10³–10⁹ Schwarzschild Radii

Satomi Nakahara^1,2,* , Akihiro Doi^1,2

, Yasuhiro Murata^1,2

, Kazuhiro Hada³

, Masanori Nakamura⁴

and Keiichi Asada⁴

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

⁴

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

(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)

View Full-Text | Download PDF [1175 KB, uploaded 20 December 2016] |

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Abstract

We report the jet width profile of of the nearby (

\sim 30 Mpc

) AGN NGC 4261 for both the approaching jet and the counter jet at radial distances ranging from

\sim 10^{3}

–

10^{9}

Schwarzschild radius (

R_{S}

) 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

10^{3}

–

10^{9} R_{S}

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. View Full-Text

Keywords: AGN jet; jet structure; VLBI observations AGN jet; jet structure; VLBI observations

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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.

AMA 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(4):80.

Chicago/Turabian Style

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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