C H A N D R A
S C I E N C E
C E N T E R O B S E R V A T I O N C A T A L O G |
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Abstract: We propose exploratory observations of five obscured AGN candidates at z~6, selected by the Subaru HSC survey. X-ray surveys indicate increasing obscured AGN fraction towards high-z and theoretical work predicts this trend to continue to z=6-7. Despite the expected abundance, no reliable detection of obscured AGN has been made so far. The proposed targets are selected among the faint quasars discovered in the unprecedented large area and greater depths of the HSC survey, and are characterised by a faint rest-frame UV continuum and luminous (>1e44 erg/s) and extremely large EW (>250A) of narrow Ly_alpha. Our proposed program may reveal the first, powerful obscured quasars at z~6 and provide us with crucial constraints on SMBH formation mechanism in the early Universe. |
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