SIMBAD references

2002ApJS..141...23E - Astrophys. J., Suppl. Ser., 141, 23-29 (2002/July-0)

JHK' imaging photometry of Seyfert 1 active galactic nuclei and quasars. I. Multiaperture photometry.

ENYA K., YOSHII Y., KOBAYASHI Y., MINEZAKI T., SUGANUMA M., TOMITA H. and PETERSON B.A.

Abstract (from CDS):

Near-infrared JHK' imaging photometry was obtained of 331 AGNs consisting mainly of Seyfert 1 active galactic nuclei (AGNs) and quasars (QSOs). This sample was selected to cover a range of radio emission strength, redshift from z=0 to 1, and absolute B magnitude from MB=-29 mag to -18 mag. Among low-z AGNs with z<0.3, Seyfert 1-1.5 AGNs are distributed over a region from a location typical of ``galaxies'' to a location typical of ``QSOs'' in the two-color J-H to H-K' diagram, but Seyfert 1.8-2 AGNs are distributed around the location of ``galaxies.'' Moreover, bright AGNs with respect to absolute B magnitude are distributed near the location of ``QSOs'', while faint AGNs are near the location of ``galaxies.'' The distribution of such low-z AGNs in this diagram was found to have little dependence on their 6 cm radio flux. The near-infrared colors of the AGNs observed with an aperture of 7 pixels (7".49) are more QSO-like than those observed with larger apertures up to 15 pixels (16".1). This aperture effect may be explained by contamination from the light of host galaxies within larger apertures. This effect is more prominent for less luminous AGNs.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: Photometry - Galaxies: Seyfert - Infrared: Galaxies - Galaxies: Quasars: General

VizieR on-line data: <Available at CDS (J/ApJS/141/23): table1.dat table2a.dat table2b.dat table2c.dat>

Simbad objects: 330

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2002ApJS..141...23E and select 'bookmark this link' or equivalent in the popup menu


2019.12.16-14:58:39

© Université de Strasbourg/CNRS

    • Contact