Welcome to Dr. Denise Gabuzda's Radio Astronomy and AGN group, UCC

July 3, 2014

Our research group studies Active Galactic Nuclei at radio frequencies using Very Long Baseline Interferometry, a technique which combines data from multiple radio telescopes that can be seperated by very large distances. With the high resolution provided by these large baselines the inner regions of relativistic jets emanating from the cores of AGNs can be studied. Our group uses the US-based VLBA to observe these regions at multiple polarisations. This polarisation data can then be used to probe the magnetic fields in the vicinity of the relativistic jet - in particular polarisation features such as spine-sheath structure and Faraday rotation can yield valuable information about jet behaviour.

Recent work by our group includes studies of the effects of finite resolution on Faraday rotation structure, the observation of reversals in the direction of Faraday rotation measure gradient across AGN jets and the development of Maximum Entropy Method based deconvolution software to image jet polarisation. A list of recent publications can be seen here.

Study Astrophysics at UCC

July 3, 2014

UCC offers an excellent undergraduate degree in Astrophysics, along with exciting opportunities for postgraduate study in one of our three Astrophysics groups. See here for details of the undergraduate degree, and check the main UCC astrophysics site to see all the research activities available.

Summer Students 2014

June 19, 2014

We have 4 Summer students joining the radio astronomy and AGN group this Summer. Amy Kirwan, Caolan David Houston, Naomi Roche and Sebastian Knuettel are working on multiwavelength VLBI polarisation observations of AGN and analyzing Faraday rotation measure images to search for and estimate the significance of gradients perpendicular to the jet structure.

Release of data from 18-22 cm MOJAVE-I observations

July 23, 2013

We are currently making data from our recent VLBA observation, BG 196, available to the general public. We are doing this in conjuction with the MOJAVE program based at Perdue university. This experiment is a study of the MOJAVE 1 sample at 18 - 22 cm. All sources are observed with the 4 Stokes parameters and maps of the polarised emission, polarisation angle and, if applicible, rotation measure have been made. See here for more details.

Summer Students 2013

July 23, 2013

Every Summer new students join our group to do a project in some area of radio astronomy and AGN. This year we have 3 Summer students - Sebastian Knuettel, Eamonn O'Neil and Brendan Reardon. They are mostly working on analyzing Faraday rotation measure images to search for and estimate the significance of gradients perpendicular to the jet structure, indicative of helical jet magnetic fields.

Contact Us

University College Cork

University College Cork
Kane Building Room 118
Extension 2003 or 2468
d.gabuzda_at_ucc.ie

UCC Astrophysics

UCC Physics