Other
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335...35f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 1, 1988, p. 35-39.
Other
26
Astronomical Spectroscopy, Extragalactic Radio Sources, Intergalactic Media, Lyman Alpha Radiation, Quasars, Absorption Spectra, H I Regions, Red Shift
Scientific paper
Optical observations of the QSO 3CR 196 reveal the presence of low-ionization absorption (Ca II, Fe II, Mg I, Mg II, and Mn II) at a redshift of 0.43685 + or - 0.00005, about 60 km/s away from the 21-cm absorption feature previously reported. Since the radio emission is predominantly from extended lobes, the absorber must be at least large enough to cover the optical QSO and part of one or both of the lobes. This leads directly to a lower limit on the size of the absorber of about 13/h(50) kpc. Under a plausible set of assumptions, this size limit, coupled with the observed velocity difference between the radio and optical absorption, leads to a lower limit on the mass of the absorber of about 5 x 10 to the 9th solar masses. The relative elemental depletions are similar to those reported for other absorption-line systems containing Ca(+) and for the interstellar medium toward Zeta Oph.
Chaffee Frederic H. Jr.
Foltz Craig B.
Wolfe Arthur M.
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