50 citations · 174 across the 7 of their papers we have counts for
4 papers · 1 filter
Impact cratering and the Oort cloud
J. T. Wickramasinghe, W. M. Napier
We calculate the expected flux profile of comets into the planetary system from the Oort cloud arising from Galactic tides and encounters with molecular clouds. We find that both p…
Ultraluminous X-ray Sources, High Redshift QSOs and Active Galaxies
G. Burbidge, E. M. Burbidge, H. C. Arp +1
It is shown that all of the 32 point X-ray sources which lie within about 10' of the centre of nearby galaxies, and which have so far been optically identified are high redshift ob…
An anomalous concentration of QSOs around NGC 3079
E. M. Burbidge, G. Burbidge, H. C. Arp +1
It is shown that there are at least 21 QSOs within 1 degree of the nearby active spiral galaxy NGC3079. Many of them are bright (mag<18) so that the surface density of those closer…
The Distribution of Redshifts in New Samples of Quasi-stellar Objects
G. Burbidge, W. M. Napier
Two new samples of QSOs have been constructed from recent surveys to test the hypothesis that the redshift distribution of bright QSOs is periodic in . The first of thes…