VizieR Online Data Catalog: ASKAP HI imaging of the Lyon Group of Galaxies 351 (For+, 2019)

ASKAP is a radio interferometer (700-1800MHz) that consists of 36 antennas and has a bandwidth of ~300MHz. Each antenna is 12m in diameter and is equipped with a state-of-the-art MK II phased array feed (PAF). ASKAP is designed to provide high angular and spectral resolution as well as an instantaneous large field of view (5.5°x5.5°) with 36 beams for achieving a fast survey speed (Johnston et al. 2007PASA...24..174J; Hotan et al. 2014PASA...31...41H; McConnell et al. 2016PASA...33...42M). An early science program with 12 and, later, 16 MK II PAF-equipped antennas (hereafter ASKAP-12) was conducted during 2016 October to 2018 January. The observations allow us to test the automated data processing software, ASKAPSOFT, assess the data quality, and optimize our data analysis and imaging techniques.

The M 83 field is one of four selected WALLABY early science phase 1 fields, with the majority of the observations taken using 12 antennas.

We perform source finding using SOFIA (Serra et al. 2015MNRAS.448.1922S) and obtain a catalogue of 40 HI sources. Among these sources, two are new HI galaxies that do not have optical identifications and one is a tidally interacting pair.

We adopt the 2MASS K_s-band to stellar mass relation to derive stellar masses. We also calculate HI masses, HI deficiency parameters, and rotational velocities. We derive the total SFRs of 34 galaxies using NUV and MIR calibration, using archival GALEX data (Martin et al. 2005ApJ...619L...1M, Morrissey et al. 2007ApJS..173..682M) in the Kepler field and WISE band-4 data (Wright et al. 2010AJ....140.1868W).

(3 data files).