activity
19982008
most citedNew optical spectra and general discussion on the nature of ULX's

24 citations · 127 across the 22 of their papers we have counts for

collaborators

22 papers

astro-ph2008★ 4 cited

The 2dF Redshift Survey II: UGC 8584 - Redshift Periodicity and Rings

H. Arp, C. Fulton

UGC 8584 was selected by a computer program as having a number of quasars around it that obeyed the Karlsson periodicity in its reference frame. On closer examination 9 of the near…

astro-ph2008★ 1 cited

A Cluster of High Redshift Quasars with Apparent Diameter 2.3 Degrees

H. Arp, C. Fulton

During analysis of the relation of quasars to galaxies in the 2dF deep field a concentration of quasars was noted. Most striking was the closeness in redshift of 14 quasars about t…

astro-ph2007

Dark Energy and the Hubble Constant

H. Arp

Dark energy is inferred from a Hubble expansion which is slower at epochs which are earlier than ours. But evidence reviewed here shows for nearby galaxies is actually less t…

astro-ph2007★ 2 cited

Quasars and the Hubble Relation

H. Arp

If active galaxies are defined as extragalactic objects with appreciably non thermal spectra then a continuity exists in redshift from the highest redshift quasars to low redshift…

astro-ph2007★ 1 cited

How certain is the distance to the most luminous supernova?

H. Arp

A recent supernova has been reported as exceeding ``the light output of an ordinary supernova by at least two orders of magnitude''. It is noted that it falls in a minor galaxy in…

astro-ph2007

M31 and Local Group QSO's

H. Arp, D. Carosati

Previous analyses have shown companion galaxies aligned along the minor axis of M31. The alignment includes some galaxies of higher redshift than conventionally accepted for Local…