AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91

Details AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91 AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..418..233o&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 present rest-frame optical/near-infrared spectra of the gravitationally lensed quasar APM 08279+5255 at z=3.91 that has been taken using the Infrared Camera (IRC) onboard the AKARI infrared satellite. The observed continuum consists of two components; a power-law component dominating optical wavelengths which is the direct light from the central source and thermal emission dominating near-infrared wavelengths which is attributed to the emission from hot dust in the circumnuclear region. The thermal emission well represents optically thick emission by hot dust at T ˜ 1300 K with &tau2μm > 2. Thus, our observations directly detected the optically thick region of hot dust in APM 08279+5255. HI recombination lines of Hα(0.656 μm), Paα(1.875 μm), and Paβ(1.282 μm) are clearly detected at 3.2, 6.3, and 9.3 μm. Simulations with the photoionization models suggest that APM 08279+5255 has BLR(Broad Line Region) clouds characterized by log nH ˜ 12 - 14 for the gas density, log U ˜ -2 - -6 for the ionization parameter, and E(B-V)˜ 0.3 - 0.6 for the broad line region. Thus, optically thick emission of hot dust support an idea on non-spherical distribution of dust near the central source, consistent with the Active Galactic Nuclei model with the dust torus.

Affiliated with

Also associated with

No associations

Rating

AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and AKARI Near and Mid-Infrared Spectroscopy of APM 08279+5255 at z=3.91 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1111646