Reddening of ~35000 quasars from SDSS

DOI

We explore the extinction/reddening of ~35000 uniformly selected quasars with 00.2. Simulations show both populations of quasars are intrinsically bluer than the mean composite, with a mean spectral index ({alpha}{lambda}) of -1.79 (-1.83). The emission and absorption-line properties of both samples reveal that quasars with intrinsically red continua have narrower Balmer lines and stronger high-ionization emission lines, the latter indicating a harder continuum in the extreme-UV and the former pointing to differences in black hole mass and/or orientation.

Cone search capability for table J/AJ/149/203/table2 (Individual fit values)

Identifier
DOI http://doi.org/10.26093/cds/vizier.51490203
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/149/203
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/203
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/203
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/149/203
Provenance
Creator Krawczyk C.M.; Richards G.T.; Gallagher S.C.; Leighly K.M.; Hewett P.C.,Ross N.P.; Hall P.B.
Publisher CDS
Publication Year 2015
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; High Energy Astrophysics; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy