The ultraviolet spectrum of the high red shift BL Lac object 0215+015

Details The ultraviolet spectrum of the high red shift BL Lac object 0215+015 The ultraviolet spectrum of the high red shift BL Lac object 0215+015

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..573b&link_type=abstract

In ESA 3rd European IUE Conf. p 573-575 (SEE N83-11889 02-88)

Physics

Bl Lacertae Objects, Hydrogen, Lyman Spectra, Red Shift, Abundance, Ion Density (Concentration), Iue, Resonance Lines, Ultraviolet Absorption

Scientific paper

The hydrogen Lyman lines of the red shift systems in BL Lac 0215 + 015 were studied by combining three low dispersion IUE spectra. Lyman alpha lines are identified from four of the red shift systems. In the Za = 1.649 system, Lyman beta, gamma and delta lines are noted. Features attributed to zero red shift, galactic MgII and FeII are present. Column densities for six ionic species in the Za = 1.345 system are similar to those for halo, galactic gas in a Large Magellanic Cloud sightline, implying that the system arises in an intervening galaxy in the line of sight to 0215 + 015. Uncertainties in abundance profile determination cause overestimates in H1, and underestimates in ion column densities.

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