Intrinsic formation of narrow-line absorption systems in QSOs – I. The piston phase
نویسندگان
چکیده
منابع مشابه
Intrinsic Absorption in Radio-Selected QSOs
Moderate resolution spectra have been recorded for a sample of radio-selected QSOs (z ∼ 2.5) discovered in the “Faint Images of the Radio Sky at Twenty centimeters” (FIRST) VLA survey. This work is motivated by the study of a heterogeneous set of QSO absorption line spectra that showed that as many as 36% of the absorbers normally thought to be intergalactic are correlated with physical propert...
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We calculate the neutral hydrogen column density of self-absorption in QSOs predicted in a model where the QSOs are located in the same halos that contain the gas in damped Lyα absorption systems. The model is parameterized by the probability P0 that any halo has an active QSO. We assume that the QSOs ionize the gas, but do not expel or heat it. The derived H I column densities produce negligib...
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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...
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I present the current state of knowledge about narrow ( < ∼ 500 km s) ultraviolet absorption that is intrinsic to QSOs. I consider interpretations in the context of the accretion-disk/wind scenario of QSOs.
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Correlations between BAL QSO intrinsic properties and polarization have been searched for. Some results are summarized here, providing possible constraints on BAL outflow models.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1980
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/191.4.785