Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...161..209s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 2, June 1986, p. 209-216.
Astronomy and Astrophysics
Astrophysics
7
Astronomical Spectroscopy, Quasars, Spectrum Analysis, Astronomical Photometry, Forbidden Transitions, Galactic Clusters, Gravitational Lenses, Red Shift, Spectral Resolution
Scientific paper
Low and intermediate dispersion spectroscopy of Q0107 - 025 A and B obtained at ESO, AAT, and MMT provide evidence for spectral differences between these two quasars. A redshift difference of 0.004 is found between the two objects, and forbidden emission lines due to O II (3727 A), Ne III (1815), and possibly Ne V (3426 A), are seen in the spectrum of Q0107 - 025 A, while only the forbidden Ne III line at 1815 A is possibly detected in the spectdrum of Q0107 - 025 B. No narrow absorption lines could be detected in the 3252 - 5616 A spectral range of the intermediate resolution data of either quasar, and the spectrum of quasar B is found to be steeper in the blue that of the quasar A. The possible presence of a highly redshifted cluster of galaxies in the field of these quasars is suggested by CCD photometry.
Arp Halton
Gosset Eric
Kruszewski Adrian
Robertson Gordon J.
Shaver Peter A.
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