Narrow Absorption Lines Complex. II. Probing the Line-locking Signatures within the Trough-like Broad Absorption Line

In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar SDSS J021740.96-085447.9 (hereafter J0217-0854). Utilizing the two-epoch spectroscopic observations of J0217-0854 from the Sloan Digital Sky S...

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Published inThe Astrophysical journal Vol. 863; no. 2; pp. 186 - 189
Main Authors Lu, Wei-Jian, Lin, Ying-Ru
Format Journal Article
LanguageEnglish
Published Philadelphia The American Astronomical Society 20.08.2018
IOP Publishing
Subjects
Absorption
Astrophysics
galaxies: active
Helium
Locking
Quasars
quasars: absorption lines
quasars: individual (SDSS J021740.96-085447.9)
Signatures
Sky surveys (astronomy)
Space telescopes
Troughs
Online AccessGet full text
ISSN0004-637X
1538-4357
DOI10.3847/1538-4357/aad411

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Abstract In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar SDSS J021740.96-085447.9 (hereafter J0217-0854). Utilizing the two-epoch spectroscopic observations of J0217-0854 from the Sloan Digital Sky Survey, we find that each of its C iv, Si iv, N v, and Ly BAL troughs actually contain at least seven NAL systems. By splitting these BAL troughs into multiple NAL systems, we find that the velocity separations between the NAL systems are similar to their doublet splittings, with some of them matching perfectly. Cases like J0217-0854, showing line-locking signatures of NALs within BAL troughs, offer direct observational evidence for the idea that radiative forces play a significant role in driving BAL (at least for Type N BAL) outflows.
AbstractList In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar SDSS J021740.96-085447.9 (hereafter J0217-0854). Utilizing the two-epoch spectroscopic observations of J0217-0854 from the Sloan Digital Sky Survey, we find that each of its C iv, Si iv, N v, and Ly BAL troughs actually contain at least seven NAL systems. By splitting these BAL troughs into multiple NAL systems, we find that the velocity separations between the NAL systems are similar to their doublet splittings, with some of them matching perfectly. Cases like J0217-0854, showing line-locking signatures of NALs within BAL troughs, offer direct observational evidence for the idea that radiative forces play a significant role in driving BAL (at least for Type N BAL) outflows.
In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar SDSS J021740.96–085447.9 (hereafter J0217–0854). Utilizing the two-epoch spectroscopic observations of J0217–0854 from the Sloan Digital Sky Survey, we find that each of its C iv, Si iv, N v, and Lyα BAL troughs actually contain at least seven NAL systems. By splitting these BAL troughs into multiple NAL systems, we find that the velocity separations between the NAL systems are similar to their doublet splittings, with some of them matching perfectly. Cases like J0217–0854, showing line-locking signatures of NALs within BAL troughs, offer direct observational evidence for the idea that radiative forces play a significant role in driving BAL (at least for Type N BAL) outflows.
In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar SDSS J021740.96–085447.9 (hereafter J0217–0854). Utilizing the two-epoch spectroscopic observations of J0217–0854 from the Sloan Digital Sky Survey, we find that each of its C iv , Si iv , N v , and Ly α BAL troughs actually contain at least seven NAL systems. By splitting these BAL troughs into multiple NAL systems, we find that the velocity separations between the NAL systems are similar to their doublet splittings, with some of them matching perfectly. Cases like J0217–0854, showing line-locking signatures of NALs within BAL troughs, offer direct observational evidence for the idea that radiative forces play a significant role in driving BAL (at least for Type N BAL) outflows.
Author Lin, Ying-Ru
Lu, Wei-Jian
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Snippet In this paper, we report the line-locking phenomenon of the blended narrow absorption lines (NALs) within trough-like broad absorption lines (BALs) in quasar...
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SubjectTerms Absorption
Astrophysics
galaxies: active
Helium
Locking
Quasars
quasars: absorption lines
quasars: individual (SDSS J021740.96-085447.9)
Signatures
Sky surveys (astronomy)
Space telescopes
Troughs
Title Narrow Absorption Lines Complex. II. Probing the Line-locking Signatures within the Trough-like Broad Absorption Line
URI https://iopscience.iop.org/article/10.3847/1538-4357/aad411
https://www.proquest.com/docview/2365826579
Volume 863
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