Astrometric Reverberation Mapping

Abstract

Spatially extended emission regions of Active Galactic Nuclei (AGN) respond to continuum variations, if such emission regions are powered by energy reprocessing of the continuum. The response from different parts of the reverberating region arrives at different times lagging behind the continuum variation. The lags can be used to map the geometry and kinematics of the emission region (i.e., reverberation mapping, RM). If the extended emission region is not spherically symmetric in configuration and velocity space, reverberation may produce astrometric offsets in the emission region photocenter as a function of time delay and velocity, detectable with future micro-arcsec to tens of micro-arcsec astrometry. Such astrometric responses provide independent constraints on the geometric and kinematic structure of the extended emission region, complementary to traditional reverberation mapping. In addition, astrometric RM is more sensitive to infer the inclination of a flattened geometry and the rotation angle of the extended emission region.

ApJ in press

References in corpus (9)

• A Catalog of Quasar Properties from SDSS DR7
• Geometric and Dynamical Models of Reverberation Mapping Data
• Taking the Measure of the Universe: Precision Astrometry with SIM PlanetQuest
• The Lick AGN Monitoring Project: Velocity-Delay Maps from the Maximum-Entropy Method for Arp 151
• Orientation dependency of broad-line widths in quasars and consequences for black-hole mass estimation
• The Mass of the Black Hole in Arp 151 from Bayesian Modeling of Reverberation Mapping Data
• Precision Astrometry with Adaptive Optics
• Zooming into the broad line region of the gravitationally lensed quasar Q2237+0305 = the Einstein Cross: III. Determination of the size and structure of the CIV and CIII] emitting regions using microlensing
• Spectroastrometry of rotating gas disks for the detection of supermassive black holes in galactic nuclei. II. Application to the galaxy Centaurus A (NGC 5128)

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• Dust Reverberation Mapping in Distant Quasars from Optical and Mid-Infrared Imaging Surveys
• An Unusual Mid-Infrared Flare in a Type 2 AGN: An Obscured Turning-on AGN or Tidal Disruption Event?
• Spatially Resolving the Kinematics of the <100 μas Quasar Broad Line Region using Spectroastrometry
• Spectroastrometric Reverberation Mapping of Broad-line Regions
• Determining sub-parsec supermassive black hole binary orbits with infrared interferometry