Spectrophotometry of the galaxies and nebulosity associated with the quasar III ZW 2

Details Spectrophotometry of the galaxies and nebulosity associated with the quasar III ZW 2 Spectrophotometry of the galaxies and nebulosity associated with the quasar III ZW 2

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..729g&link_type=abstract

Astrophysical Journal, Part 1, vol. 226, Dec. 15, 1978, p. 729-731, 733-735.

Mathematics

Logic

21

Astronomical Photometry, Galactic Radiation, Nebulae, Quasars, Spectrophotometry, Elliptical Galaxies, Emission Spectra, Galactic Clusters, Red Shift, Spiral Galaxies

Scientific paper

Results are presented for spectrophotometry of the object III Zw 2, the faint nebulosity to the NW of its nucleus, and two associated galaxies (a normal elliptical and a more luminous late-type spiral). The object III Zw 2 is defined to be a quasar on the basis of its dominant starlike nucleus, redshift, and optical and radio variability. The spectrophotometrically measured redshifts of the two associated galaxies are shown to place III Zw 2 as a member of Zwicky Cluster 0007.7+1056, thus establishing the cosmological origin of the quasar's emission-line redshift of 0.089. It is found that the nebulosity to the NW of the quasar exhibits an emission-line spectrum at the same redshift as the nucleus with an underlying red continuum, that the strength of the forbidden lines relative to the permitted lines is 3 to 4 times greater than in the nucleus, and that the data for the nebulosity are not well fitted by a bremsstrahlung emission spectrum, but are consistent with a spectrum of starlight from an underlying galaxy at the system redshift of 0.089.

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