TY - JOUR
T1 - No Galaxy-scale [C ii] Fast Outflow in the z = 6.72 Red Quasar HSC J1205-0000
AU - Sawamura, Mahoshi
AU - Izumi, Takuma
AU - Nakanishi, Kouichiro
AU - Okuda, Takeshi
AU - Strauss, Michael A.
AU - Imanishi, Masatoshi
AU - Matsuoka, Yoshiki
AU - Toba, Yoshiki
AU - Umehata, Hideki
AU - Hashimoto, Takuya
AU - Baba, Shunsuke
AU - Goto, Tomotsugu
AU - Kawaguchi, Toshihiro
AU - Kohno, Kotaro
AU - Salak, Dragan
AU - Kawamuro, Taiki
AU - Iwasawa, Kazushi
AU - Onoue, Masafusa
AU - Lee, Chien Hsiu
AU - Lee, Kianhong
N1 - Publisher Copyright:
© 2025. The Author(s). Published by the American Astronomical Society.
PY - 2025/2/10
Y1 - 2025/2/10
N2 - HSC 120505.09-000027.9 (J1205-0000) is one of the highest redshift (z = 6.72) dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large Millimeter/submillimeter Array data of the [C ii] 158 μm line and the underlying rest-frame far-infrared (FIR) continuum emission, previously reported in T. Izumi et al. (2021b), toward J1205-0000. Red quasars are thought to be a transitional phase from an obscured starburst to a luminous blue quasar, in some cases associated with massive outflows driven by the active galactic nucleus (AGN). J1205-0000 has a high FIR luminosity, LFIR = 2.5 × 1012 L⊙ and a total IR luminosity of LTIR = 3.5 × 1012 L⊙, corresponding to a star formation rate of ∼528 M⊙ yr−1. With the [C ii]-based dynamical mass of ∼1 × 1011 M⊙, we conclude that J1205-0000 is hosted by a starburst galaxy. In contradiction to T. Izumi et al., our improved analysis shows no hint of a broad component in the [C ii] line spectrum. Thus there is no evidence for a host galaxy-scale fast [C ii] outflow, despite the fact that J1205-0000 has fast nuclear ionized outflows seen in the rest-frame UV. We explore several scenarios for this discrepancy (e.g., the early phase of AGN feedback, reliability of the [C ii] line as a tracer of outflows), and we claim that it is still too early to conclude that there is no significant negative AGN feedback on star formation in this red quasar.
AB - HSC 120505.09-000027.9 (J1205-0000) is one of the highest redshift (z = 6.72) dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large Millimeter/submillimeter Array data of the [C ii] 158 μm line and the underlying rest-frame far-infrared (FIR) continuum emission, previously reported in T. Izumi et al. (2021b), toward J1205-0000. Red quasars are thought to be a transitional phase from an obscured starburst to a luminous blue quasar, in some cases associated with massive outflows driven by the active galactic nucleus (AGN). J1205-0000 has a high FIR luminosity, LFIR = 2.5 × 1012 L⊙ and a total IR luminosity of LTIR = 3.5 × 1012 L⊙, corresponding to a star formation rate of ∼528 M⊙ yr−1. With the [C ii]-based dynamical mass of ∼1 × 1011 M⊙, we conclude that J1205-0000 is hosted by a starburst galaxy. In contradiction to T. Izumi et al., our improved analysis shows no hint of a broad component in the [C ii] line spectrum. Thus there is no evidence for a host galaxy-scale fast [C ii] outflow, despite the fact that J1205-0000 has fast nuclear ionized outflows seen in the rest-frame UV. We explore several scenarios for this discrepancy (e.g., the early phase of AGN feedback, reliability of the [C ii] line as a tracer of outflows), and we claim that it is still too early to conclude that there is no significant negative AGN feedback on star formation in this red quasar.
UR - https://www.scopus.com/pages/publications/85217139856
UR - https://www.scopus.com/inward/citedby.url?scp=85217139856&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ada943
DO - 10.3847/1538-4357/ada943
M3 - Article
AN - SCOPUS:85217139856
SN - 0004-637X
VL - 980
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 121
ER -