[Previous] | [Session 123] | [Next]
M. Burbidge (University of California San Diego), H. C. Arp (MPI, Astrophysics, Garching)
The ultraluminous infrared galaxy IC 4553, No. 220 in Arp's Atlas of Peculiar Galaxies, is a strong extended multiple-component X-ray emitter that also contains OH megamaser emitters in its central few-tenths arc sec region. In mapping the several compact X-ray objects in the field around Arp 220, we found that two coincide with stellar objects with magnitudes 19.6 and 19.75, on the Palomar Observatory Sky Survey E plates. These stellar objects are aligned on either side of the strongest X-ray emitting region of Arp 220, and are almost equidistant from it (7\prime.9 and 8\prime .0). Spectra obtained on June 4, 2000 with the Kast spectrograph on the 3-m Shane Telescope at Lick Observatory reveal the remarkable result that both these objects are quasars emitting strong broad CIV \lambda 1550, CIII] \lambda 1909, MgII \lambda 2800 at almost exactly the same redshift, z = 1.256. This is more, and particularly striking, evidence to add to data already published on QSOs around the AGN galaxies NGC 4258, 1068, 2639, 3516, 5985, demonstrating that many QSOs have large intrinsic redshift components and showing their connection with AGN galaxies.