Extremely Red Mid-infrared Selected Objects in the AKARI NEP Deep Field: Dust Obscured Type-1 AGN?

Details Extremely Red Mid-infrared Selected Objects in the AKARI NEP Deep Field: Dust Obscured Type-1 AGN? Extremely Red Mid-infrared Selected Objects in the AKARI NEP Deep Field: Dust Obscured Type-1 AGN?

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..418..515m&link_type=abstract

AKARI, a Light to Illuminate the Misty Universe ASP Conference Series, Vol. 418, proceedings of a conference held 16-19 February

Astronomy and Astrophysics

Astronomy

Scientific paper

We describe observational characteristics of three Extremely Red MIR-bright Objects (ERMOs, satisfying R - [15] ≥ 6.5 AB mag) found in the AKARI North Ecliptic Pole (NEP) deep field at z=1.5-2.2, showing broad Mg II emission (˜5000 km sec-1) while their broad-band spectral energy distributions (SEDs) at optical and mid-infrared are power-law, similar to that of the type-2 AGN. Since their SEDs cannot be explained solely by any AGN dust torus templates, we propose that the stellar population co-exists with the AGN dust torus. The interstellar dust clouds associated with the stellar population may be responsible for the extinction of the broad-line regions.

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