Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332l..49d&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 332, Sept. 15, 1988, p. L49-L53.
Astronomy and Astrophysics
Astrophysics
23
Astronomical Spectroscopy, Galactic Nuclei, Gravitational Lenses, Quasars, Charge Coupled Devices, Emission Spectra, Line Spectra, Spatial Resolution
Scientific paper
Long-slit CCD spectra of the central region of the gravitational-lens system candidate 2237 + 030 were obtained at the CFHT. The slit was placed in two position angles covering two of the four quasar component candidates at a time. The brightest two components (A and B) are spatially resolved and have similar emission-line profiles in the semiforbidden line of C III. The fainter two components (C and D) are marginally resolved spatially, and have C III profiles similar to those observed for components A and B, although there is substantial contamination through scattering from A and B. The spatial position and extent of the C III emission line from the spectrum of components C and D are found to be consistent with the hypothesis that at least component C has a quasar spectrum identical to that of components A and B. The spectroscopic data strongly confirm the hypothesis that 2237 + 030 is a gravitational-lens system.
de Robertis Michael M.
Yee Howard K. C.
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