Timothy J Galvin

New 6 and 3-cm radio-continuum maps of the Small Magellanic Cloud : Part II - point source catalogue

We present two new catalogues of radio-continuum sources in the field of the Small Magellanic Cloud (SMC). These catalogues contain sources found at 4800 MHz (λ=6cm) and 8640 MHz (λ=3cm). Some 457 sources have been detected at 3cm with 601 sources at 6cm created from new high-sensitivity and resolution radio-continuum images of the SMC from Crawford et al. (2011).

New 20-cm radio-continuum study of the Small Magellanic Cloud. Part II : Point sources

We present a new catalogue of radio-continuum sources in the field of the Small Magellanic Cloud (SMC). This catalogue contains sources previously not found in 2370 MHz (λ=13 cm) with sources found at 1400 MHz (λ=20 cm) and 843 MHz (λ=36 cm). 45 sources have been detected at 13 cm, with 1560 sources at 20 cm created from new high sensitivity and resolution radio-continuum images of the SMC at 20 cm from paper I. We also created a 36 cm catalogue to which we listed 1689 radio-continuum sources.

The Spectral Energy Distribution of Powerful Starburst Galaxies I : Modelling the Radio Continuum

We have acquired radio continuum data between 70\,MHz and 48\,GHz for a sample of 19 southern starburst galaxies at moderate redshifts (

20 cm VLA radio-continuum study of M31 - images and point source catalogues DR2 : extraction of a supernova remnant sample

0.067 < z < 0.227

20-CM radio-continuum study of the SMC: Part III - Compact HII Regions

) with the aim of separating synchrotron and free-free emission components. Using a Bayesian framework we find the radio continuum is rarely characterised well by a single power law, instead often exhibiting low frequency turnovers below 500\,MHz, steepening at mid-to-high frequencies, and a flattening at high frequencies where free-free emission begins to dominate over the synchrotron emission. These higher order curvature components may be attributed to free-free absorption across multiple regions of star formation with varying optical depths. The decomposed synchrotron and free-free emission components in our sample of galaxies form strong correlations with the total-infrared bolometric luminosities. Finally, we find that without accounting for free-free absorption with turnovers between 90 to 500\,MHz the radio-continuum at low frequency (

A Multi-Frequency Study of the Milky Way-Like Spiral Galaxy NGC 6744

\nu < 200

20 cm VLA RADIO-CONTINUUM STUDY OF M31 - IMAGES AND POINT SOURCE CATALOGUES

\,MHz) could be overestimated by upwards of a factor of twelve if a simple power law extrapolation is used from higher frequencies. The mean synchrotron spectral index of our sample is constrained to be

New 20-cm radio-continuum study of the Small Magellanic Cloud. Part I, Images

\alpha=-1.06

NEW 6 AND 3-cm RADIO-CONTINUUM MAPS OF THE SMALL MAGELLANIC CLOUD. PART I { THE MAPS

, which is steeper then the canonical value of

Radio-continuum study of the Nearby sculptor group galaxies. Part 1: NGC 300 at λ=20 cm

-0.8