Pavo XD-10, an X-ray S`QSO with extended optical structure

Details Pavo XD-10, an X-ray S`QSO with extended optical structure Pavo XD-10, an X-ray S`QSO with extended optical structure

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..557g&link_type=abstract

Nature (ISSN 0028-0836), vol. 313, Feb. 14, 1985, p. 557-559.

Astronomy and Astrophysics

Astronomy

4

Astronomical Photometry, Charge Coupled Devices, Quasars, Astronomical Maps, Galactic Radiation, Gravitational Lenses, Luminous Intensity

Scientific paper

Deep charge-coupled device (CCD) images of the quasi-stellar object (QSO) identified with the Einstein X-ray source Pavo XD-10 show an optical structure that is dramatically extended. Here the morphology, the photometry from the CCD data, and the limited spectral information are discussed which indicates a redshift (z) of 0.72 for the system. It is shown that if the extended structure represents a galaxy hosting the z = 0.72 QSO, the galaxy luminosity is 2 mag brighter than the host galaxies detected for QSOs at lower redshifts. Instead, the system may be the result of a galaxy-galaxy interaction. A third and more speculative possibility is that it is the result of gravitational lensing, with much of the 'underlying' structure representing the lens galaxy in the line-of sight.

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