Results 41 to 50 of about 113,643 (296)
EXTENDED SCATTERING ENVELOPE IN THE Q2237+0305 QUASAR
Purpose: Studying the accretion disc structure in the Q2237+0305 gravitationally lensed quasar in optical wavelengths; estimation of parameters of the matter accretion regime onto a central black hole.
L. A. Berdina +2 more
doaj +1 more source
The city is a set of arbitrary visual experiences dispersed in time that must necessarily be integrated. In studying the absences, Bruno Toscano writes that “the city would appear to us in a less verisimilar facies if we resigned ourselves to consider
Farina, Arianna
doaj +1 more source
Improved redshifts for SDSS quasar spectra [PDF]
A systematic investigation of the relationship between different redshift estimation schemes for more than 91000 quasars in the Sloan Digital Sky Survey (SDSS) Data Release 6 (DR6) is presented.
Abazajian +30 more
core +3 more sources
The Faint End of the Quasar Luminosity Function at z ∼ 5 from the Subaru Hyper Suprime-Cam Survey [PDF]
We present the quasar luminosity function at z ∼ 5 derived from the optical wide-field survey data obtained as a part of the Subaru strategic program (SSP) with the Hyper Suprime-Cam (HSC).
M. Niida +19 more
semanticscholar +1 more source
Preliminary Target Selection for the DESI Quasar (QSO) Sample [PDF]
The DESI survey will measure large-scale structure using quasars as direct tracers of dark matter in the redshift range 0.9 < z < 2.1 and using quasar Lyα forests at z > 2.1. We present two methods to select candidate quasars for DESI based on imaging in
C. Yéche +26 more
semanticscholar +1 more source
Autosomal Dominant Leukodystrophy: A Disease of the Nuclear Lamina
The nuclear lamina is a fibrous meshwork of proteins found adjacent to the inner nuclear membrane that plays a critical role in the maintenance of nuclear architecture.
Quasar S. Padiath
doaj +1 more source
Circum-Galactic Medium in the Halo of Quasars
The properties of circum-galactic gas in the halo of quasar host galaxies are investigated analyzing Mg II 2800 and C IV 1540 absorption-line systems along the line of sight close to quasars.
Riccardo Ottolina +6 more
doaj +1 more source
The Sloan Digital Sky Survey Quasar Catalog: Fourteenth data release [PDF]
OCEVU Labex by the "Investissements d'Avenir" French government [ANR-11-LABX-0060]; A*MIDEX project by the "Investissements d'Avenir" French government [ANR-11-IDEX-0001-02]; Agence Nationale de la Recherche [ANR-16-CE31-0021]; Leverhulme Trust Early ...
I. Pâris +44 more
semanticscholar +1 more source
Discovery of the First Low-luminosity Quasar at z > 7 [PDF]
We report the discovery of a quasar at z = 7.07, which was selected from the deep multi-band imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey.
Y. Matsuoka +47 more
semanticscholar +1 more source
I review recent results for quasars and discuss how they are related to activity in galaxies. Topics included are studies of quasar host galaxies with HST; searches for quasars in the Hubble Deep Field; evolution of the quasar luminosity function; news highlights from astro-ph; and current observational research problems and their relation to ...
openaire +2 more sources

