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Title: Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties

Abstract

Abstract This work provides evidence that a large fraction of C iv narrow absorption lines (NALs) seen along the line of sight to distant quasars are due to accretion disc winds, while also seeking to understand the relationship between NALs and certain quasar-intrinsic properties. We extend the results from past work in the literature using $${\sim}105\, 000$$ NALs from a sample of $${\sim}58\, 000$$ SDSS quasars. The primary results of this work are summarized as follows: (1) the velocity distribution (dN/dβ) of NALs is not a function of radio loudness (or even detection) once marginalized by optical/UV luminosity; (2) there are significant differences in the number and distribution of NALs as a function of both radio spectral index and optical/UV luminosity, and these two findings are not entirely interdependent; (3) improvements in quasar systemic redshift measurements and differences in the NAL distribution as a combined function of optical luminosity and radio spectral index together provide evidence that a significant portion of NALs are due to outflows; (4) the results are consistent with standard models of accretion disc winds governed by the LUV–αox relationship and line-of-sight orientation indicated by radio spectral index, and (5) possibly support a magnetically arrested disc model as an explanation for the semistochastic nature of strong radio emission in a fraction of quasars.

Authors:
ORCiD logo [1]; ORCiD logo [1]
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  1. Department of Physics, Drexel University, 32 S. 32nd Street, Philadelphia, PA 19104, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1557916
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 488 Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Stone, Robert B., and Richards, Gordon T. Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz2111.
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Stone, Robert B., & Richards, Gordon T. Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties. United Kingdom. https://doi.org/10.1093/mnras/stz2111
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Stone, Robert B., and Richards, Gordon T. Mon . "Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties". United Kingdom. https://doi.org/10.1093/mnras/stz2111.
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@article{osti_1557916,
title = {Narrow, intrinsic C iv absorption in quasars as it relates to outflows, orientation, and radio properties},
author = {Stone, Robert B. and Richards, Gordon T.},
abstractNote = {Abstract This work provides evidence that a large fraction of C iv narrow absorption lines (NALs) seen along the line of sight to distant quasars are due to accretion disc winds, while also seeking to understand the relationship between NALs and certain quasar-intrinsic properties. We extend the results from past work in the literature using ${\sim}105\, 000$ NALs from a sample of ${\sim}58\, 000$ SDSS quasars. The primary results of this work are summarized as follows: (1) the velocity distribution (dN/dβ) of NALs is not a function of radio loudness (or even detection) once marginalized by optical/UV luminosity; (2) there are significant differences in the number and distribution of NALs as a function of both radio spectral index and optical/UV luminosity, and these two findings are not entirely interdependent; (3) improvements in quasar systemic redshift measurements and differences in the NAL distribution as a combined function of optical luminosity and radio spectral index together provide evidence that a significant portion of NALs are due to outflows; (4) the results are consistent with standard models of accretion disc winds governed by the LUV–αox relationship and line-of-sight orientation indicated by radio spectral index, and (5) possibly support a magnetically arrested disc model as an explanation for the semistochastic nature of strong radio emission in a fraction of quasars.},
doi = {10.1093/mnras/stz2111},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 488,
place = {United Kingdom},
year = {2019},
month = {8}
}
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https://doi.org/10.1093/mnras/stz2111
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