Probing quasar shutdown timescales with Hanny's Voorwerp
Journal article published in 2012 by
Daniel A. Evans,
Hanny van Arkel,
Kevin Schawinski 
,
Shanil Virani,
C. Megan Urry,
William C. Keel,
Priyamvada Natarajan,
Chris J. Lintott,
Anna Manning,
Paolo Coppi,
Sugata Kaviraj ,
Steven P. Bamford,
Gyula I. G. Józsa,
Michael Garrett,
H. Van Arkel
and other authors.
,
Shanil Virani,
C. Megan Urry,
William C. Keel,
Priyamvada Natarajan,
Chris J. Lintott,
Anna Manning,
Paolo Coppi,
Sugata Kaviraj ,
Steven P. Bamford,
Gyula I. G. Józsa,
Michael Garrett,
H. Van Arkel
and other authors.
