Journal article
Probing the Structure of SDSS J1004+4112 through Microlensing Analysis of Spectroscopic Data
Proceedings of the International Astronomical Union, v 18(S381), pp 162-167
Dec 2022
Abstract
We aim to uncover the structure of the continuum and broad emission line (BEL) emitting regions in the gravitationally lensed quasar SDSS J1004+4112 through unique microlensing signatures. Analyzing 20 spectroscopic observations from 2003 to 2018, we study the striking deformations of various BEL profiles and determine the sizes of their respective emitting regions. We use the emission line cores as a baseline for no microlensing and then apply Bayesian methods to derive the sizes of the Lyα, Si IV, C IV, C III], and Mg II emitting regions, as well as of the underlying continuum-emitting sources. We find that the sizes of the emitting regions for the BELs are a few light-days across, notably smaller than in typical lensed quasars. The asymmetric distortions observed in the BELs suggest that the broad-line region lacks spherical symmetry and is likely confined to a plane. The inferred continuum emitting region sizes are larger than predictions based on standard thin-disk theory by a factor of ∼ 4. We find that the size-wavelength relation is in agreement with that of a geometrically thin and optically thick accretion disk.
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Details
- Title
- Probing the Structure of SDSS J1004+4112 through Microlensing Analysis of Spectroscopic Data
- Creators
- C. Fian - 1Departamento de Astronomía y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, SpainJ. A. Muñoz - 1Departamento de Astronomía y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, SpainR. Forés-Toribio - 1Departamento de Astronomía y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, SpainE. Mediavilla - 3Instituto de Astrofsica de Canarias, Va Láctea S/N, La Laguna 38200, Tenerife, SpainJ. Jiménez-Vicente - 5Departamento de Fsica Teórica y del Cosmos, Universidad de Granada, Campus de Fuentenueva, 18071 Granada, SpainD. Chelouche - University of HaifaS. Kaspi - Tel Aviv UniversityG. T. Richards - 10Department of Physics, Drexel University, 32 S. 32nd Street, Philadelphia, PA 19104, USA
- Publication Details
- Proceedings of the International Astronomical Union, v 18(S381), pp 162-167
- Publisher
- Cambridge University Press
- Number of pages
- 6
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Scopus ID
- 2-s2.0-85186682133
- Other Identifier
- 991021860815504721