Investigating ionized disc models of the variable narrow-line Seyfert 1 PG 1404+226
نویسندگان
چکیده
منابع مشابه
The Narrow-line Region of Seyfert Galaxies: Narrow-line Seyfert 1s versus Broad-line Seyfert 1s
It is known that the spectral energy distribution (SED) of the nuclear radiation of narrow-line Seyfert 1 galaxies (NLS1s) has different shapes with respect to that of ordinary broad-line Seyfert 1 galaxies (BLS1s), particularly in wavelengths of X-ray. This may cause some differences in the ionization degree and the temperature of gas in narrow-line regions (NLRs) between NLS1s and BLS1s. This...
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We study the properties of infrared-selected QSOs (IR QSOs), opticallyselected QSOs (PG QSOs) and Narrow Line Seyfert 1 galaxies (NLS1s). We compare their properties from the infrared to the optical and examine various correlations among the black hole mass, accretion rate, star formation rate and optical and infrared luminosities. We find that the infrared excess in IR QSOs is mostly in the fa...
متن کاملInvestigating the nature of narrow-line Seyfert 1 galaxies with high-energy spectral complexity
With the commissioning of XMM-Newton came the discovery of 2.5 − 10 keV spectral complexity in some narrow-line Seyfert 1 galaxies (NLS1). This high-energy complexity can be manifested as sharp, spectral drops or gradual curvature in the spectrum. Models which are normally considered are ionised reflection and partial-covering. In this work, we define two samples of NLS1: a complex sample whose...
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We present simultaneous ASCA and RXTE observations of Ark 564, the brightest known ‘narrow-line’ Seyfert 1 in the 2–10 keV band. The measured X-ray spectrum is dominated by a steep (Γ ≈ 2.7) power-law continuum extending to at least 20 keV, with imprinted Fe K-line and -edge features and an additional ‘soft excess’ below ∼ 1.5 keV. The energy of the iron K-edge indicates the presence of highly ...
متن کامل[ O III ] emission line in narrow - line Seyfert 1 galaxies
Three sets of two-component profiles are used to simultaneously model the [O III]λλ4959, 5007 and Hβ lines for the Fe II-subtracted spectra of 149 narrow-line Seyfert 1 galaxies (NLSls) from the Sloan Digital Sky Survey (SDSS). Using the linewidth of the narrow/core component of [O III]λ5007 to trace the stellar velocity dispersion instead of using the total linewidth of [O III]λ5007, we found ...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2005
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2005.09258.x