A Multi-Frequency Study of the MilKY Way-like Spiral Galaxy NGC 67 44.
Document Type
Article
Publication Date
2018
Abstract
We present a multi-frequency study of the intermediate spiral SAB(r)bc type galaxy NGC 6744, using available data from the Chandra X-Ray telescope, radio continuum data from the Australia Telescope Compact Array and Murchison Widefield Array, and Wide-field Infrared Survey Explorer infrared observations. We identify 117 X-ray sources and 280 radio sources. Of these, we find nine sources in common between the X-ray and radio catalogues, one of which is a faint central black hole with a bolometric radio luminosity similar to the Milky Way’s central black hole. We classify 5 objects as supernova remnant candidates, 2 objects as likely supernova remnants, 17 as H ii regions, 1 source as an AGN; the remaining 255 radio sources are categorized as background objects and one X-ray source is classified as a foreground star. We find the star-formation rate (SFR) of NGC 6744 to be in the range 2.8 – 4.7 M yr-1 signifying the galaxy is still actively forming stars. The specific SFR of NGC 6744 is greater than that of late-type spirals such as the Milky Way, but considerably less that that of a typical starburst galaxy.
Recommended Citation
Publications of the Astronomical Society of Australia, vol. 35, no. 15, pp. 1-9.