TY - JOUR
T1 - A shock-induced pair of superbubbles in the high-redshift powerful radio galaxy MRC 0406-244
AU - Taniguchi, Yoshiaki
AU - Ohyama, Youichi
AU - Murayama, Takashi
AU - Yoshida, Michitoshi
AU - Kashikawa, Nobunari
AU - Iye, Masanori
AU - Aoki, Kentaro
AU - Sasaki, Toshiyuki
AU - Kosugi, George
AU - Takata, Tadafumi
AU - Saito, Yoshihiko
AU - Kawabata, Koji S.
AU - Sekiguchi, Kazuhiro
AU - Okita, Kiichi
AU - Shimizu, Yasuhiro
AU - Inata, Motoko
AU - Ebizuka, Noboru
AU - Ozawa, Tomohiko
AU - Yadomaru, Yasushi
AU - Taguchi, Hiroko
AU - Shioya, Yasuhiro
AU - Nishiura, Shingo
AU - Sudou, Hiroshi
AU - Nagao, Tohru
AU - Noda, Saeko
AU - Koyama, Yohei
AU - Kakazu, Yuko
AU - Ajiki, Masaru
AU - Fujita, Shinobu S.
AU - Kobayashi, Rie R.
N1 - Funding Information:
We would like to thank the staff of the Subaru Telescope office. We also thank Fumihide Iwamuro and Carlos De Breuck for useful discussions on HzPRGs and the referee, Patrick McCarthy, for useful comments and suggestions. This work was financially supported in part by the Ministry of Education, Science, and Culture (grants 10044052 and 10304013).
PY - 2001/9/20
Y1 - 2001/9/20
N2 - We present new optical spectroscopy of the high-redshift powerful radio galaxy MRC 0406-244 at redshift of 2.429. We find that the two extensions toward the northwest and southeast probed in the rest-frame ultraviolet image are heated mainly by the nonthermal continuum of the active galactic nucleus. However, each extension shows a shell-like morphology, suggesting that they are a pair of superbubbles induced by the superwind activity rather than by the interaction between the radio jet and the ambient gas clouds. If this is the case, the intense starburst responsible for the formation of superbubbles could occur ∼1 × 109 yr ago. On the other hand, the age of the radio jets may be on the order of ∼106 yr, being much shorter than the starburst age. Therefore, the two events, i.e., the starburst and the radio jet activities, are independent phenomena. However, their directions of the expanding motions could be governed by the rotational motion of the gaseous component in the host galaxy. This idea appears to explain the alignment effect of MRC 0406-244.
AB - We present new optical spectroscopy of the high-redshift powerful radio galaxy MRC 0406-244 at redshift of 2.429. We find that the two extensions toward the northwest and southeast probed in the rest-frame ultraviolet image are heated mainly by the nonthermal continuum of the active galactic nucleus. However, each extension shows a shell-like morphology, suggesting that they are a pair of superbubbles induced by the superwind activity rather than by the interaction between the radio jet and the ambient gas clouds. If this is the case, the intense starburst responsible for the formation of superbubbles could occur ∼1 × 109 yr ago. On the other hand, the age of the radio jets may be on the order of ∼106 yr, being much shorter than the starburst age. Therefore, the two events, i.e., the starburst and the radio jet activities, are independent phenomena. However, their directions of the expanding motions could be governed by the rotational motion of the gaseous component in the host galaxy. This idea appears to explain the alignment effect of MRC 0406-244.
KW - Galaxies: active
KW - Galaxies: individual (MRC 0406-244)
KW - Galaxies: starburst
KW - Radio continuum: galaxies
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U2 - 10.1086/323652
DO - 10.1086/323652
M3 - Article
AN - SCOPUS:0035922275
VL - 559
SP - L9-L12
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1 PART 2
ER -