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The
Colm J. Cannon Memorial Lecture
Monday October 13 at 8:00pm
Physics Building Trinity
College, Dublin 2.
"Looking for a Pulse: Search for
Radio Emission from Extrasolar Planets"
by Gregg Hallinan (Centre
for Astronomy NUI Galway).
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During aurorae, the magnetic poles of the Earth become billion
watt
beacons beaming powerful radio beams into space. With the latest
generation of powerful radio telescopes we can now begin to search
for
the same kind of radio waves from planets in orbit around other
stars.
Gregg Hallinan is an astronomer working at the Centre for
Astronomy in the National University of Ireland Galway whose work
involves trying to understand the nature of magnetic activity in
stars, brown dwarfs and planets.Recently in his research he used all together the 27
dishes of the Very Large Array (VLA) in New Mexico, the Arecibo
dish in Puerto Rico, the Green Bank dish in West Virginia,
the Effelsberg dish in Germany and the 10 dishes of the Very Long
Baseline Array (VLBA) spaced all over the USA. This effectively
gave us
a telescope the size of Earth with a resolution 50 times better
than the
Hubble Space Telescope.
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His research interests include:
- Magnetic activity in planets, brown dwarfs
and stars
- Computational modeling of plasma emission
processes
Key/recent publications
- Hallinan, G., Bourke, S., Lane, C., Antonova,
A., Zavala R.T., Brisken, W.F., Boyle R.P., Vrba, F.J., Doyle,
J.G. and Golden, A. Periodic Bursts of Coherent Radio Emission
from an Ultracool Dwarf. ApJ in press (2007)
- Hallinan, G., Antonova, A., Doyle, J. G.,
Bourke, S., Brisken, W. F. & Golden, A, Rotational
Modulation of the Radio Emission from the M9 Dwarf TVLM
513-46546: Broadband Coherent Emission at the Substellar
Boundary? /Astrophys. J./ 653, 690 (2006)
- Hallinan, G., Bourke, S., Lane, C., Antonova,
A., Zavala R.T., Brisken, W.F., Boyle R.P., Vrba, F.J., Doyle,
J.G. and Golden, A. 14th Cambridge Workshop on Cool Stars,
Stellar Systems, and the Sun, November 6-10, 2006 (Poster
presentation - Winner Best Poster at Conference). To appear in
proceedings published with the Astronomical Society of the
Pacific. (2007)
- Hallinan, G., Bourke, S., Lane, C., Antonova,
A., Zavala R.T., Brisken, W.F., Boyle R.P., Vrba, F.J., Doyle,
J.G. and Golden, A. Coronae of Stars and Accretion Disks,
Max-Planck-Institut für Radioastronomie, Bonn, Germany, 12-13
December 2006 (Oral presentation). To appear in proceedings
published with Memorie della Societa Astronomica Italiana.
(2007)
- Antonova, A., Doyle, J.G., Hallinan, G.,
Golden, A., Koen, C. and Olah, K. Sporadic Radio Activity from
a Brown Dwarf. Astron. Astrophys (2007)
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Book seats HERE
Order DVD HERE
Physics Bldg, Trinity
College, Dublin 2.
Near the Westland Row or Lincoln Place entrances
MAP
of Campus
Directions and maps: How to get to Trinity
College
Map of area
around Trinity College
Admission: 7 (
5 members and concessions)
This lecture is also available to members nationwide
on DVD, which you can order by credit card online HERE or by calling (01) 847 0777 (alternatively post a
cheque or postal order to: September 2008 DVD, Astronomy Ireland, PO. Box
2888, Dublin 5.) As a sample, a low-resolution version will be
available FREE on this website. DVDs of this and past
lectures are just 7 each (add 5 for P&P for any number of
DVDs).
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