Opt. & NIR spectral atlas of 16 2MASS NIR-red AGNs Virtual Observatory Resource

Authors
  1. Kim D.
  2. Im M.
  3. Canalizo G.
  4. Kim M.
  5. Kim Ji H.
  6. Woo J.-H.
  7. Taak Y.C.,Kim J.-W.
  8. Lazarova M.
  9. Published by
    CDS
Abstract

We present medium-resolution spectra (R~2000-4000) at 0.4-1.0{mu}m and 0.7-2.5{mu}m of 16 active galactic nuclei (AGNs) selected with red color in the near-infrared (NIR) of J-K>2.0mag at z~0.3. We fit the H{beta}, H{alpha}, P{beta}, and P{alpha} lines from these spectra to obtain their luminosities and line widths. We derive the E(B-V) color excess values of the NIR-red AGNs using two methods, one based on the line-luminosity ratios and another based on the continuum slopes. The two E(B-V) values agree with each other at rms dispersion ~0.249. About half of the NIR-red AGNs have g'-K<5 magnitude, and we find that these NIR-red, but blue in optical-NIR AGNs, have E(B-V)~0, suggesting that a significant fraction of the NIR color-selected red AGNs are unobscured or only mildly obscured. After correcting for the dust extinction, we estimate the black hole (BH) masses and the bolometric luminosities of the NIR-red AGNs using the Paschen lines to calculate their Eddington ratios ({lambda}Edd). The median Eddington ratios of nine NIR-red AGNs (log({lambda}_Edd_~-0.654+/-0.176) are only mildly higher than those of unobscured type 1 AGNs (log({lambda}_Edd_~-0.961+/-0.008). Moreover, we find that the MBH-{sigma}* relation for three NIR-red AGNs is consistent with that of unobscured type 1 AGNs at similar redshift. These results suggest that the NIR-red color selection alone is not effective at picking up dusty, intermediate-stage AGNs.

Keywords
  1. active-galactic-nuclei
  2. infrared-astronomy
  3. spectroscopy
  4. visible-astronomy
  5. redshifted
  6. absolute-magnitude
Bibliographic source Bibcode
2018ApJS..238...37K
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/238/37
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJS/238/37
Document Object Identifer DOI
doi:10.26093/cds/vizier.22380037

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/238/37
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/238/37
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/238/37
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/238/37/agn?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/238/37/agn?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/238/37/agn?

History

2019-01-24T15:06:02Z
Resource record created
2019-01-24T15:06:02Z
Created
2020-04-16T13:01:26Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr