λ5007 and X-RAY PROPERTIES of A COMPLETE SAMPLE of HARD X-RAY SELECTED AGNs in the LOCAL UNIVERSE

Y. Ueda, Y. Hashimoto, K. Ichikawa, Y. Ishino, A. Y. Kniazev, P. Väisänen, C. Ricci, S. Berney, P. Gandhi, M. Koss, R. Mushotzky, Y. Terashima, B. Trakhtenbrot, M. Crenshaw

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We study the correlation between the [O iii] λ5007 and X-ray luminosities of local active galactic nuclei (AGNs), using a complete, hard X-ray (>10 keV) selected sample in the Swift/BAT 9-month catalog. From our optical spectroscopic observations at the South African Astronomical Observatory and the literature, a catalog of [O iii] λ5007 line flux for all 103 AGNs at Galactic latitudes of is compiled. Significant correlations with intrinsic X-ray luminosity () are found for both observed () and extinction-corrected () luminosities, separately for X-ray unabsorbed and absorbed AGNs. We obtain the regression form of and from the whole sample. The absorbed AGNs with low (<0.5%) scattering fractions in soft X-rays show on average smaller and ratios than the other absorbed AGNs, while those in edge-on host galaxies do not. These results suggest that a significant fraction of thisopulation is buried in tori with small opening angles. By using these versus correlations, the X-ray luminosity function (LF) of local AGNs (including Compton-thick AGNs) in a standardopulation synthesis model gives much better agreement with the [O iii] λ5007 LF derived from the Sloan Digital Sky Survey thanreviously reported. This confirms that hard X-ray observations are a veryowerful tool to find AGNs with high completeness.

Original languageEnglish
Article number1
JournalAstrophysical Journal
Volume815
Issue number1
DOIs
Publication statusPublished - 2015 Dec 10

Keywords

  • X-rays: galaxies
  • galaxies: Seyfert
  • galaxies: active
  • quasars: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'λ5007 and X-RAY PROPERTIES of A COMPLETE SAMPLE of HARD X-RAY SELECTED AGNs in the LOCAL UNIVERSE'. Together they form a unique fingerprint.

  • Cite this

    Ueda, Y., Hashimoto, Y., Ichikawa, K., Ishino, Y., Kniazev, A. Y., Väisänen, P., Ricci, C., Berney, S., Gandhi, P., Koss, M., Mushotzky, R., Terashima, Y., Trakhtenbrot, B., & Crenshaw, M. (2015). λ5007 and X-RAY PROPERTIES of A COMPLETE SAMPLE of HARD X-RAY SELECTED AGNs in the LOCAL UNIVERSE. Astrophysical Journal, 815(1), [1]. https://doi.org/10.1088/0004-637X/815/1/1