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Quasar emission lines as probes of orientation: implications for disc wind geometries and unification

Abstract:

The incidence of broad absorption lines (BALs) in quasar samples is often interpreted in the context of a geometric unification model consisting of an accretion disc and an associated outflow. We use the Sloan Digital Sky Survey quasar sample to test this model by examining the equivalent widths (EWs) of C IV 1550 Å, Mg II 2800 Å, [O III] 5007 Å and C III] 1909 Å. We find that the emission line EW distributions in BAL and non-BAL quasars are remarkably similar – a property that is inconsisten...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1093/mnras/stx231

Authors


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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Astrophysics
Department:
ASTROPHYSICS
Role:
Author
More from this funder
Name:
National Aeronautics and Space Administration
Funding agency for:
Long, K
Grant:
NNG15PP48P
More from this funder
Name:
Science and Technology Facilities Council
Funding agency for:
Matthews, J
Knigge, C
Grant:
ST/N000919/1
More from this funder
Name:
Leverhulme Trust
Funding agency for:
Knigge, C
Publisher:
Oxford University Press
Journal:
Monthly Notices of the Royal Astronomical Society More from this journal
Volume:
467
Issue:
3
Pages:
2571-2584
Publication date:
2017-01-27
Acceptance date:
2017-01-24
DOI:
ISSN:
0035-8711 and 1365-2966
Keywords:
Pubs id:
pubs:715970
UUID:
uuid:67f250ea-ec52-4490-a272-7472992e1cae
Local pid:
pubs:715970
Source identifiers:
715970
Deposit date:
2018-02-21

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