Results 91 to 100 of about 20,438 (217)

Cosmic Himalayas: The Highest Quasar Density Peak Identified in a 10,000 deg2 Sky with Spatial Discrepancies between Galaxies, Quasars, and IGM H i

open access: yesThe Astrophysical Journal
We report the identification of a quasar overdensity in the BOSSJ0210 field, dubbed the Cosmic Himalayas, consisting of 11 quasars at z = 2.16−2.20, the densest overdensity of quasars (17 σ ) in the ∼10,000 deg ^2 of the Sloan Digital Sky Survey (SDSS ...
Yongming Liang   +29 more
doaj   +1 more source

The Low-Mass End of the MBH/Mhost Relation in Quasars

open access: yesAdvances in Astronomy, 2012
The MBH-Mhost relation in quasars has been probed only in a limited parameter space, namely, at MBH∼109 M⊙ and Mhost∼1012  M⊙. Here we present a study of 26 quasars laying in the low-mass end of the relation, down to MBH∼107 M⊙.
Roberto Decarli   +5 more
doaj   +1 more source

Polarization of Quasars [PDF]

open access: yesSymposium - International Astronomical Union, 1972
I report here work done at Jodrell Bank by Mr John Gilbert and myself at a wavelength of 49 cm, on the degree of linear polarization, m49. For most sources the polarization is considerably reduced from its short wavelength value. We presume that most of this depolarization is by Faraday rotation, or rather by Faraday dispersion, between different parts
openaire   +2 more sources

Quasars and Their Host Galaxies [PDF]

open access: yes, 2006
This review attempts to describe developments in the fields of quasar and quasar host galaxies in the past five. In this time period, the Sloan and 2dF quasar surveys have added several tens of thousands of quasars, with Sloan quasars being found to z>6. Obscured, or partially obscured quasars have begun to be found in significant numbers.
openaire   +4 more sources

The Detection Rate of Associated Mg ii Absorption Lines in Quasars Depends on Their Radio Emission

open access: yesThe Astrophysical Journal
In active galactic nuclei, jet-driven feedback plays a significant role in influencing the properties of gas within their host galaxy and the circumgalactic medium.
Zhi-Fu Chen, Luis C. Ho
doaj   +1 more source

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