Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1642c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, Sept. 1985, p. 1642-1647.
Astronomy and Astrophysics
Astronomy
40
Elliptical Galaxies, Emission Spectra, H Lines, Hydrogen Clouds, Quasars, Spiral Galaxies, Astronomical Spectroscopy, Centimeter Waves, Data Reduction, Galactic Structure, Radial Velocity, Spectral Line Width
Scientific paper
A sensitive search for H I emission from the host galaxies of all seven "real" quasars (MB < -21.5 for H0 = 100 km s-1Mpc-1) with z < 0.1 lying in the declination range +2 < δ(deg) < +35 was made with the new λ = 22 cm feed at Arecibo. Both I Zw 1 and Mrk 304 reside in galaxies containing 7×109M_sun; of neutral hydrogen. About 12×109M_sun; of H I was detected in the Ton 951 field. The remaining quasar host galaxies were not detected at levels ⪆109M_sun;. An extremely accurate systemic velocity was obtained from the apparently undisturbed symmetric horned profile of I Zw 1. It shows that the low-ionization emission-line system is nearly at rest, while the high-ionization forbidden lines [O III] and [Ne III] are blueshifted by 700 km s-1 relative to the systemic frame. This blueshift appears to require both radial motions and dust absorption in the high-ionization portion of the narrow-line emitting region.
Condon James J.
Gower Ann C.
Hutchings John B.
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