Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...534..587n&link_type=abstract
The Astrophysical Journal, Volume 534, Issue 2, pp. 587-593.
Astronomy and Astrophysics
Astronomy
9
Galaxies: Active, Galaxies: Individual (Ax J08494+4454), Infrared: Galaxies, Galaxies: Quasars: General
Scientific paper
Results of near-infrared (NIR) observations of a type 2 QSO, AX J08494+4454, at z=0.9, which was identified in our optical follow-up observations of the ASCA Lynx deep survey, are presented. NIR J-band spectroscopic observations show presence of a narrow (FWHM=470 km s-1) Hα emission line and no strong broad component, which confirms that this object is type 2, as suggested in the previous optical spectroscopy (no broad Hβ emission). IC and K-band imaging observations reveal that this object has a significantly redder color (IC-K=3.4 mag) than normal type 1 QSOs but has a similar color to those of nearby type 2 Seyfert galaxies and starburst galaxies. The absolute magnitude of this object in B band is much fainter than M*B for the type 1 QSO luminosity function at z~0.9, but about 1.5 mag brighter than M*B of the luminosity function for field galaxies at z~0.9. The red color and the faint optical magnitude may be a result of dust extinction, or we may be seeing the host galaxy with a hidden active nucleus. Based on observations with the United Kingdom Infrared Telescope (UKIRT), which is operated by the Joint Astronomy Centre on behalf of the Particle Physics and Astronomy Research Council U.K., and the University of Hawaii 2.2 m Telescope, HI.
Akiyama Masayuki
Nakanishi Kouichiro
Ohta Kouji
Yamada Toru
No associations
LandOfFree
Near-Infrared Observations of Type 2 QSO at z=0.9 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 Near-Infrared Observations of Type 2 QSO at z=0.9, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near-Infrared Observations of Type 2 QSO at z=0.9 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1127186