STIS Echelle Spectra of the Seyfert 1 Galaxy NGC 5548

Details STIS Echelle Spectra of the Seyfert 1 Galaxy NGC 5548 STIS Echelle Spectra of the Seyfert 1 Galaxy NGC 5548

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.3608c&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #36.08; Bulletin of the American Astronomical Society, Vol. 30, p.863

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high-resolution UV spectra of the Seyfert 1 galaxy NGC 5548, obtained with the Space Telescope Imaging Spectrograph (STIS) on 1998 March 11. The spectra cover the wavelength region 1150 -- 3100 Angstroms at a resolution of R = 40,000. We discuss preliminary results on the intrinsic UV absorption lines, which include Lalpha , C IV lambda lambda 1548.2, 1550.8, and N V lambda lambda 1238.8, 1242.8. Multiple kinematic components, which are all blueshifted with respect to the emission-line centroids, are seen in each line. We also give upper limits to the equivalent widths of S IV lambda lambda 1393.8, 1402.8 and Mg II lambda lambda 2796.4, 2803.5 absorption. We use the STIS spectra to investigate the physical conditions in the absorbing gas as a function of radial velocity, and to look for changes in the C IV components since the GHRS high-resolution spectrum obtained on 1996 August 24.

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