Results 101 to 110 of about 6,949,336 (206)
On the host galaxies of quasars [PDF]
, 2005 I present the results of three distinct, but inter-connected studies of the nature and evolution of the host galaxies of quasars. These three are: i) An HST V-band study of a sample of 17 quasars at z ≈ 0.4, with absolute magnitudes in the range -24 ≥
Floyd, David James Elford
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Journal of Vinyl and Additive Technology, Volume 32, Issue 2, Page 410-430, March 2026.Adjusting extrusion variables are a key to balance the flame retardancy and mechanical properties of polyolefin/leather waste fiber composites. ABSTRACT The extrusion processing variables represent a key to the optimal use of additives and thus the development of flame‐retardant polymer composites. Adjusting the property profile, for example, finding a
Guadalupe Sanchez‐Olivares +3 more
wiley +1 more source
X-ray Insights into the Nature of Quasars with Redshifted Broad Absorption Lines
, 2017 International audienceWe present Chandra observations of seven broad absorption line (BAL) quasars at $z=0.863\mbox{--}2.516$ with redshifted BAL troughs (RSBALs). Five of our seven targets were detected by Chandra in 4–13 ks exposures with ACIS-S. The ${
Brandt, W. N. +26 more
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, 2013 . Although the extragalactic nature of quasars was discussed as early as 1960, it was rejected largely because of preconceived ideas about what appeared to be an unrealistically high radio and optical luminosity.
K I Kellermann
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Space distribution and luminosity function of quasars
, 1988 We discuss the evolution of the luminosity function of quasars in terms of either density evolution or luminosity evolution. The observations appear to support pure luminosity evolution in which the entire luminosity function shifts in the luminosity ...
Schmidt, Maarten
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Context. Quasi-stellar objects (QSOs) are a basis for an absolute reference system for astrometric studies. A system like this at the far side of nearby galaxies is required to facilitate measuring of the proper motions of these galaxies.
Michel Dennefeld +17 more
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K-band imaging of 52 B3-VLA quasars: Nucleus and host properties
, 1998 We present K-band imaging and photometry of a sample of 52 radio-loud quasars (RQs) selected from the B3 survey with flux densities greater than 0.5 Jy at 408 MHz.
Carballo Fidalgo, Ruth +8 more
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A whole sky study of quasars known population starting from the LQAC-2 compiled catalogue
, 2014 Context. Thanks to huge surveys, such as the Sloan Digital Sky Survey (SDSS), the last decade has shown a dramatic increase in the number of known quasars.
C. Gattano +5 more
core +1 more source
Erratum: A quasar microlensing light-curve generator for LSST [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 Favio Neira +2 more
openaire +1 more source
The density structure around quasars from optical depth statistics [PDF]
, 2005 We present a method for studying the proximity effect and the density structure around redshift z= 2-3 quasars. It is based on the probability distribution of Lyman-α pixel optical depths and its evolution with redshift. We validate the method using
Rollinde, Emmanuel +9 more
core +1 more source