Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XIII. Large-scale Feedback and Star Formation in a Low-luminosity Quasar at z = 7.07 on the Local Black Hole to Host Mass Relation

Izumi, Takuma; Matsuoka, Yoshiki; Fujimoto, Seiji; Onoue, Masafusa; Strauss, Michael A.; Umehata, Hideki; Imanishi, Masatoshi; Kohno, Kotaro; Kawaguchi, Toshihiro; Kawamuro, Taiki; Baba, Shunsuke; Nagao, Tohru; Toba, Yoshiki; Inayoshi, Kohei; Silverman, John D.; Inoue, Akio K.; Ikarashi, Soh; Iwasawa, Kazushi; Kashikawa, Nobunari; Hashimoto, Takuya; Nakanishi, Kouichiro; Ueda, Yoshihiro; Schramm, Malte; Lee, Chien-Hsiu; Suh, Hyewon

Abstract

We present Atacama Large Millimeter/submillimeter Array [C II] 158 μm line and underlying far-infrared (FIR) continuum emission observations (0 70 × 0 56 resolution) toward HSC J124353.93+010038.5 (J1243+0100) at z = 7.07, the only low-luminosity (M1450 > −25 mag) quasar currently known at z > 7. The FIR continuum is bright (1.52 mJy) and resolved with a total luminosity of LFIR = 3.5 × 1012 Le. The spatially extended component is responsible for ∼40% of the emission. The area-integrated [C II] spectrum shows a broad wing (FWHM = 997 km s−1 , L[C II] = 1.2 × 109 Le), as well as a bright core (FWHM = 235 km s−1 , L[C II] = 1.9 × 109 Le). This wing is the first detection of a galactic-scale quasar-driven outflow (atomic outflow rate >447 Me yr−1 ) at z > 7. The estimated large mass-loading factor of the total outflow (e.g., 9 relative to the [C II]-based star formation rate) suggests that this outflow will soon quench the star formation of the host. The core gas dynamics are governed by rotation, with a rotation curve suggestive of a compact bulge (∼3.3 × 1010 Me), although it is not yet spatially resolved. Finally, we found that J1243+0100 has a black hole mass–to–dynamical mass (and –to–bulge mass) ratio of ∼0.4% (∼1%), consistent with the local value within the uncertainties. Our results therefore suggest that the black hole–host coevolution relation is already in place at z ∼ 7 for this object.

Citation

Izumi, T., Matsuoka, Y., Fujimoto, S., Onoue, M., Strauss, M. A., Umehata, H., Imanishi, M., Kohno, K., Kawaguchi, T., Kawamuro, T., Baba, S., Nagao, T., Toba, Y., Inayoshi, K., Silverman, J. D., Inoue, A. K., Ikarashi, S., Iwasawa, K., Kashikawa, N., Hashimoto, T., …Suh, H. (2021). Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). XIII. Large-scale Feedback and Star Formation in a Low-luminosity Quasar at z = 7.07 on the Local Black Hole to Host Mass Relation. Astrophysical Journal, 914(1), Article 36. https://doi.org/10.3847/1538-4357/abf6dc

• Journal Article Type: Article
• Acceptance Date: Apr 10, 2021
• Online Publication Date: Jun 14, 2021
• Publication Date: Jun 10, 2021
• Deposit Date: Jan 13, 2022
• Publicly Available Date: Jan 13, 2022
• Journal: Astrophysical Journal
• Print ISSN: 0004-637X
• Electronic ISSN: 1538-4357
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 914
• Issue: 1
• Article Number: 36
• DOI: https://doi.org/10.3847/1538-4357/abf6dc
• Public URL: https://durham-repository.worktribe.com/output/1218586