Figure 8 from Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). VI. Black Hole Mass Measurements of Six Quasars at 6.1 ≤ z ≤ 6.7

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Subaru High-z Exploration of Low-luminosity Quasars (SHELLQs). VI. Black Hole Mass Measurements of Six Quasars at 6.1 ≤ z ≤ 6.7

Authors: Masafusa Onoue, Nobunari Kashikawa, Yoshiki Matsuoka, Nanako Kato, Takuma Izumi, Tohru Nagao, Michael A. Strauss, Yuichi Harikane, Masatoshi Imanishi, Kei Ito, Kazushi Iwasawa, Toshihiro Kawaguchi, Chien-Hsiu Lee, Akatoki Noboriguchi, Hyewon Suh, Masayuki Tanaka, and Yoshiki Toba

2019 The Astrophysical Journal 880 77.

Provider: AAS Journals

Caption: Figure 8.

Histogram of the Eddington ratio for z > 5.8 quasars based on the Mg II–based scaling relation of Vestergaard & Osmer (2009, Equation (4)). The bin step is 0.5 dex, which is the same as the systematic uncertainty (Shen 2013). The HSC and CFHQS quasars at L_bol < 10⁴⁷ erg s⁻¹ are shown in red and green, respectively. The shaded histogram shows all of the z > 5.8 quasars whose Mg II lines have been measured.

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