Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..833b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, June 15, 1986, p. 833-843.
Astronomy and Astrophysics
Astronomy
17
Absorption Spectra, Abundance, Astronomical Photometry, Bl Lacertae Objects, Ion Production Rates, Spectral Line Width, Data Reduction, Iron, Magnesium, Red Shift, Spectrum Analysis
Scientific paper
Spectra of the BL Lac object 0215+015 have been obtained with the ESO 3.6-m telescope at a resolution of 18 and 29 km s-1 from 5650 to 6850 Å. Absorption lines of Mg I, Mg II, Mn II and Fe II are detected in the system at z = 1.345 known from previous observations. These lines break up into four components spread over 180 km s-1 with observed equivalent widths of isolated features ranging from 35 to 2800 mÅ. Accurate estimates of the velocity structure and column densities of the singly ionized and neutral elements mentioned above are derived for the multiple system at z = 1.345 using a line-profile fitting procedure.
Bergeron Jacqueline
Dodorico Sandro
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