Measuring H-beta BLR Flows in NGC 5548
William F. Welsh, Danielle L. Martino, Go Kawaguchi, Wolfram, Kollatschny
TL;DR
This paper analyzes archival data of NGC 5548 to study the H-beta broad-line region, revealing a correlation between line asymmetry and luminosity, and evidence of inflow dynamics through differential lag measurements.
Contribution
It provides new insights into BLR kinematics by linking line asymmetry with luminosity and detecting inflow signatures via differential lag analysis.
Findings
H-beta line becomes bluer with increasing luminosity
Blue wing lags red wing by approximately 4 days
Evidence of inflow component in the BLR
Abstract
Using archival International AGN Watch observations we find a correlation between the asymmetry of the H-beta line and the system luminosity: the line becomes bluer as the system gets brighter. We also find a differential lag between the red and blue wings of the line: the blue wing lags the red by ~4 days, suggesting an inflow component of the BLR.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Adaptive optics and wavefront sensing · Astronomy and Astrophysical Research