Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...276...92y&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 276, Jan. 1, 1984, p. 92-100.
Astronomy and Astrophysics
Astrophysics
28
Absorption Spectra, Intergalactic Media, Interstellar Gas, Quasars, Seyfert Galaxies, Ultraviolet Absorption, Deuterium, Lyman Alpha Radiation, Radial Velocity, Red Shift
Scientific paper
Spectra of two Seyfert galaxies, Mrk 509 and Akn 120, show galactic interstellar absorption lines of S II, Si II, and Fe II, while Si IV absorption is seen in the quasar 3C 273. The lines appear at LSR velocity of less than 100 km/s and probably lie within 3 kpc of the galactic disk. Extragalactic absorption lines are found in the spectrum of Mrk 509, with two redshift systems at z = 0.033 and 0.034 identified to have Ly-alpha and both members of the C IV doublet. In one of these systems, (D/H) is less than 0.0001. No metal-poor absorption systems are seen in the narrow redshift ranges sampled in each object, whereas one or two might have been expected.
Blades Chris J.
Cowie Lennox L.
Morton Donald C.
Ratcliff Stephen
Wu Congjun
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