Astronomy and Astrophysics – Astronomy
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238....1w&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, May 15, 1980, p. 1-9.
Astronomy and Astrophysics
Astronomy
33
Gravitational Lenses, Quasars, Radio Sources (Astronomy), Stellar Spectrophotometry, Absorption Spectra, Continuous Spectra, Emission Spectra, Line Spectra
Scientific paper
New spectrophotometry of the double QSO, 0957+561 is reported, and it is shown that the absorption line region in each light path is very similar in redshift, in column density of Fe(+) and in velocity dispersion. The simplest interpretation of these results is a very massive object deflecting the light from a more distant QSO. Based on this hypothesis the differences between the emission line and continuum spectra may be explained by differential reddening, implying a reddening-corrected flux ratio B/A of approximately 2-4. This ratio is different from that found at radio wavelengths (0.7 at 6 cm), but can be explained, based on the gravitational lens hypothesis, by different flux variability at radio and optical wavelengths; however, no evidence for optical variability was found. Another difficulty may be that a point-mass gravitational lens would need to have a mass-to-light ratio greater than 1000, if it is closer than z = 0.4; at larger distances its mass would be very large (about 10 to the 14th solar masses at z = 1.2). Observations obtained so far might be explained if two massive QSOs are actually closer together than they appear to be, as a result of mutual gravitational deflection of the light.
Wills Beverley J.
Wills Danielle
No associations
LandOfFree
Spectrophotometry of the double QSO, 0957+561 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spectrophotometry of the double QSO, 0957+561, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrophotometry of the double QSO, 0957+561 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1359014