A reexamination of the gravitational lens interpretation of the close QSO pair Q2345 + 007 A,B - Implications for the nature of the Lyman Alpha forest clouds

Details A reexamination of the gravitational lens interpretation of the close QSO pair Q2345 + 007 A,B - Implications for the nature of the Lyman Alpha forest clouds A reexamination of the gravitational lens interpretation of the close QSO pair Q2345 + 007 A,B - Implications for the nature of the Lyman Alpha forest clouds

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1693s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, June 1990, p. 1693-1699.

Astronomy and Astrophysics

Astronomy

18

Gravitational Lenses, Lyman Alpha Radiation, Quasars, Absorption Spectra, Astronomical Spectroscopy, Charge Coupled Devices, Emission Spectra, Photoionization, Red Shift

Scientific paper

Moderate resolution spectra of the QSO pair Q2345 + 007 A,B are presented for the wavelength range 5127-8967 A. It is found that there is a redshift difference between the two objects of 44 + or - 40 km/s. Results are presented from a search for heavy element absorption systems that may be associated with the object. The results are used to discuss models of the Lyman-alpha clouds. It is suggested that the data are best interpreted if Q2345 + 007 A and B are not a gravitational lens, in which case the characteristic physical size of the Ly-alpha clouds at x = 2 must be about 100 kpc. It is shown that the resulting picture of bloated photoionized clouds is consistent with extimates of the metagalactic ionizing flux.

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