Author

Tomotsugu Goto

2 papers indexed here

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Preprint Sep 2026

SHELLQs. Black Hole Mass and Eddington Ratio Distributions of Intermediate-Luminosity Quasars at 6

We present near-infrared spectroscopy of 21 quasars at 6.07<z<6.90 obtained with JWST/NIRSpec and Subaru/MOIRCS. These targets have absolute ultraviolet magnitudes of -25<M_1450<-22 and are drawn from a sample of z>6 quasars identified in the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project. These...

M. Onoue, J. Silverman, Y. Matsuoka et al. · 0 citations

Review Oct 2026

COSMOS-3D: Spectro-photometric Confirmation of Shabgard, a Cool, Metal-poor Brown Dwarf in the COSMOS Field

Brown dwarfs are unique laboratories for studying cool atmospheres, the low-mass end of star formation, and the transition between stars and giant planets. Identifying and characterizing the coldest brown dwarfs remains challenging, particularly at faint magnitudes in deep extragalactic surveys. We investigate COSMOS20...

B. S. Salmasi, P. Jalan, Tomotsugu Goto et al. · 0 citations