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Public Lecture

Amazing Quasars

By Professor Denise Gabuzda, Physics Dept. UCC.


About the Lecture

A quasar (also known as a QSO or quasi-stellar object ) is an extremely luminous active galactic nucleus (AGN). Most large galaxies contain a supermassive central black hole with mass ranging from millions to billions of Solar masses . In quasars and other types of AGN, the black hole is surrounded by a gaseous accretion disk . As gas in the accretion disk falls toward the black hole, energy is released in the form of electromagnetic radiation . This radiation can be observed across the electromagnetic spectrum at radio , infrared, visible, ultraviolet, and X-ray, and gamma wavelengths. The power radiated by quasars is enormous: the most powerful quasars have luminosities exceeding 10 41 watts , thousands of times greater than an ordinary large galaxy such as the Milky Way . (Wikipedia)



About the Lecturer



High-resolution radio studies of Active Galactic Nuclei using Very Long Baseline Interferometry, studies of the compact relativistic jets of AGN, the structure and evolution of their magnetic fields, interactions with the surrounding medium.


1988 Ph.D. in Physics Brandeis University, Waltham, MA, USA
Thesis Title: VLBI Polarization Measurements of BL Lacertae Objects
Thesis advisors: Dr. J. F. C. Wardle and Dr. D. H. Roberts
1983 M.A. in Physics Brandeis University
1982 B.A. in Physics and Astronomy Swarthmore College

Professional Employment

1/2008 Senior Lecturer, Department of Physics University College Cork, Ireland
1/2002 1/2008 College Lecturer, Department of Physics University College Cork, Ireland
2/1999 1/2002 Support Scientist, Joint Institute for VLBI in Europe, Dwingeloo, The Netherlands
9/1998 1/1999 Visiting Professor, National Astronomical Observatory, Mitaka, Japan
8/1998 9/1998 Visiting Researcher, Observatoire de Bordeaux, Floirac, France
2/1996 Senior Scientist, Astro Space Center, Lebedev Physical Institute, Moscow, Russia
1995 English Editor of "Astronomy Reports", the English translation of "Astronomicheskii Zhurnal"
6/1994 1/1996 Visiting Researcher, Astro Space Center, Lebedev Physical Institute, Moscow, Russia
4/1991 5/1994 Research Associate in Astrophysics, University of Calgary, Calgary, Canada
8/1989 3/1991 Postdoctoral Research Associate, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA
9/1988 7/1989 Assistant Professor of Physics, Simmons College, Boston, MA, USA




After the lecture there will be a social reception in The Lombard and we encourage all of you to come along for a chat.
All are welcome to attend and free food will be kindly provided by The Lombard.

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A prize draw will be held after the lecture.

Booking Information

Date Monday 13th August
Subject to change - please check back later
Time 8:00p.m.

Physics Bldg, Physics Department , Fitzgerald Building, Trinity College Dublin.
There is an entrance on Lincoln Place (not far from the Merrion Square end of TCD). If you get the DART or bus to Pearse St, or drive. Use the Science Gallery entrance on Pearse Street (near the corner with Westland Row) There are maps here:  Here

Parking: Mark Street , Marks Lane , Lombard St. East .

Free Parking on the above streets after 7pm
Click HERE for a building map of Trinity College campus
Click HERE for Map of area

Admission €10 (€5 Astronomy Ireland members and concessions)
Tickets where possible should be booked in advance. Tickets can also be purchased at the door on the night, please come along 15 minutes early to accommodate.

Book online below

Call 086 06 46 555 to book tickets over the phone using Debit/ Credit Card
Send a cheque/ PO/ Draft, made payable to Astronomy Ireland to PO BOX 2888, Dublin 5.


This lecture is also available to people nationwide on DVD.
To order a copy of the DVD simply:
Order by credit/ debit card online below OR
call 086 06 46 555
Alternatively post a Cheque or postal order to: Astronomy Ireland, PO. Box 2888, Dublin 5.
Cost: DVD's cost €10 each incl P&P (€5 Astronomy Ireland members)

Lecture August 2018
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Acknowledgment: Astronomy Ireland would like to thank the TCD Astrophysics Research Group for hosting AI public lectures in Trinity College Dublin.

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