University of Cambridge > Talks.cam > Institute of Astronomy Galaxies Discussion Group > When the spectral lines in the Seyfert Galaxy NGC 5548 went on holiday

When the spectral lines in the Seyfert Galaxy NGC 5548 went on holiday

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If you have a question about this talk, please contact Martin Haehnelt.

The emission-line regions in Active Galactic Nuclei (AGN) have developed the reputation as being complicated with slow progress since the first models by Bahcall & Kozlovsky in 1969. Despite this, they are necessary probes of the inner regions of AGN and a primary indicator of the black hole mass. When the recent HST STORM campaign was poised to produce the largest and best set of observations of NGC 5548 , the lines decided to go on holiday rather than participate in yet another study. I will talk about what happened, and now a disk wind can produce it. This wind is a likely source of the non-disk emission that has been noted by many studies.

This talk is part of the Institute of Astronomy Galaxies Discussion Group series.

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