Dewangan, G. C. ; Singh, K. P. ; Jones, L. R. ; McHardy, I. M. ; Mason, K. O. ; Newsam, A. M. (2001) Optical and X-ray characteristics of a newly discovered narrow-line quasi-stellar object: RX J1334.2+3759 Monthly Notices of the Royal Astronomical Society, 325 (4). pp. 1616-1624. ISSN 0035-8711
Full text not available from this repository.
Official URL: http://onlinelibrary.wiley.com/doi/10.1046/j.1365-...
Related URL: http://dx.doi.org/10.1046/j.1365-8711.2001.04579.x
Abstract
We report the discovery of a narrow-line quasi-stellar object (NLQSO) RX J1334.213759 with a steep soft X-ray spectrum. Soft X-ray emission from the NLQSO is highly variable. Changes in the intensity by a factor of ~2 have been detected in the ROSAT Position Sensitive Proportional Counter (PSPC) observations of RX J1334.2+3759 on time-scales of ~20 000-40 000 s. Rapid variability events have also been observed from RX J1334.2+3759. The most extreme variable event has ΔL/Δt=1:95±1:02. 1042 erg s−2 corresponding to a change in the intensity by a factor of ~4 within ≲400 s. The PSPC spectra of the NLQSO can be well represented by a power law of photon index ΓX ∼3:8, modified by an absorbing column local to the source (ΔNH~3:3×1020 cm−2) over and above that caused by our own Galaxy (NH=7:9×1019 cm−2). The intrinsic soft X-ray luminosity of RX J1334.2+3759 is estimated to be ∼ 2:2×1044 erg s−1 in the energy band of 0:1-2:0 keV. The optical spectrum of RX J1334.2+3759 is typical of the narrow-line Seyfert 1 (NLS1) galaxies showing strong Balmer Hβ, Hα, and forbidden line of [O III]λ5007. Fe II multiplets, usually present in the optical spectra of NLS1 galaxies, are also detected from RX J1334.2+3759. Decomposition of the Hβ and Hα line profiles shows the presence of narrow [full width at half-maximum (FWHM) ~880 kms−1] and broad (FWHM ~2850 km s−1) components in the spectrum of RX J1334.2+3759. The narrow-line region of RX J1334.2+3759 appears to be significantly different from those of normal Seyfert galaxies. A possible explanation for the observed properties of the narrow-line region and the broad-line region is suggested in terms of density enhancements.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to John Wiley and Sons. |
Keywords: | Galaxies: Active; Galaxies: Individual; RX J1334.2+3759; Galaxies: Nuclei; X-rays: Galaxies |
ID Code: | 59015 |
Deposited On: | 03 Sep 2011 12:12 |
Last Modified: | 03 Sep 2011 12:12 |
Repository Staff Only: item control page