Article (Scientific journals)
New constraints on quasar broad absorption and emission line regions from gravitational microlensing
Hutsemekers, Damien; Braibant, Lorraine; Sluse, Dominique et al.
2017In Frontiers in Astronomy and Space Sciences, 4, p. 18, pp. 1-6
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Keywords :
quasars; broad emission lines; broad absorption lines; gravitational microlensing; polarization
Abstract :
[en] Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions. In particular microlensing reveals the intrinsic absorption hidden in the P Cygni-type line profiles observed in the broad absorption line quasar H1413+117, as well as the existence of an extended continuum source. In addition, polarization microlensing provides constraints on the scattering region. In the quasar Q2237+030, microlensing differently distorts the Hα and CIV broad emission line profiles, indicating that the low- and high-ionization broad emission lines must originate from regions with distinct kinematical properties. We also present simulations of the effect of microlensing on line profiles considering simple but representative models of the broad emission line region. Comparison of observations to simulations allows us to conclude that the Hα emitting region in Q2237+030 is best represented by a Keplerian disk.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hutsemekers, Damien ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Braibant, Lorraine ;  Université de Liège - ULiège > Département ArGEnCo > Géoressources minérales & Imagerie géologique
Sluse, Dominique  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Anguita, Timo
Goosmann, René
Language :
English
Title :
New constraints on quasar broad absorption and emission line regions from gravitational microlensing
Publication date :
01 September 2017
Journal title :
Frontiers in Astronomy and Space Sciences
eISSN :
2296-987X
Publisher :
Frontiers Research Foundation, Lausanne, Switzerland
Volume :
4
Pages :
18, pp. 1-6
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 October 2017

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