The MG II line profile in the Seyfert galaxy NGC 4151 - A new outflowing component

Details The MG II line profile in the Seyfert galaxy NGC 4151 - A new outflowing component The MG II line profile in the Seyfert galaxy NGC 4151 - A new outflowing component

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225..837l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, April 15, 1987, p. 837-849.

Astronomy and Astrophysics

Astronomy

5

Absorption Spectra, Astronomical Spectroscopy, Line Spectra, Magnesium, Seyfert Galaxies

Scientific paper

This paper examines the Mg II λλ2795, 2802 doublet in the Seyfert galaxy NGC 4151 at a higher resolution than has previously been used, searching for velocity systems in absorption and emission. Evidence is presented for a new, narrow, outflowing absorption system in Mg II having a velocity of 825 km s-1 relative to the Sun, -165 km s-1 relative to the systemic velocity of NGC 4151. This feature is not present in Lyα or C IV and possible explanations for this are considered. For the Mg II and C IV lines a model decomposition of the line profile is presented.

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