Dramatic emission line variations in QSO KAZ 102 and possible causes

Details Dramatic emission line variations in QSO KAZ 102 and possible causes Dramatic emission line variations in QSO KAZ 102 and possible causes

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..419d&link_type=abstract

Astronomy and Astrophysics, v.330, p.419-422 (1998)

Astronomy and Astrophysics

Astrophysics

5

Quasars: Emission Lines, Quasars: Individual: Kaz 102=Q 1803+676

Scientific paper

We report optical spectroscopic observations of the radio-quiet quasar Kaz 102. We find impressive variations of the Hα emission line both in shape and intensity. Hα dimms by 40%, and develops a blue asymmetry within a few years. The continuum level also decreases by a similar amount. We discuss the results in terms of the kinematics of the BLR (Broad Line Region), and consider several plausible scenarios: The association of the BLR to Supernovae Remnants evolving in a dense medium, the emission from two BLRs in a binary black hole system, emission from clouds whose motion is predominantly radial coupled with light echoes, and variations in the distribution of a small number of clouds. Based on observations made at the Observatorio Astronómico Nacional at San Pedro Mártir, Baja California

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