Multiwavelength Atlas of Galaxies

Part 4:

Section 4.1.3 Normal Galaxy: NGC 300:

NGC 300 is an ScII.8 galaxy in the South Polar Group (or Sculptor Group) at a distance of 1.2 Mpc. The galaxy is inclined at ~40° and possesses a compact, bright nucleus and closely wound spiral arms.

NGC 300: Read and Pietsch (2001) report on ROSAT PSPC and HRI observations. A black hole X-ray binary candidate, a supersoft source and several SNRs and H II regions are detected. Unresolved emission comprises ~20% of the total X-ray (0.1-2.4 keV) luminosity of 5.8 x 1038 erg s-1. Carpano et al. (2007) discovered NGC 300 X-1, a Wolf-Rayet/compact X-ray binary system, with a period of 32.8 h.

The HST FOC Mid-UV image (Maoz et al. 1996) shows many point-like sources, with the brightest at the nucleus which is resolved (FWHM ~0.2").

Davidge (1998) studied the evolved stellar content with deep J, H and K imaging noting significant numbers of ~10 Gyr old AGB stars suggesting that the disk contains an underlying old population.

The IRAS 60 µm emission (Rice 1993) is dominated by large, star forming regions.

Puche, Carignan and Bosma (1990) find that the VLA observed H I distribution is very extended, and warped at large radii. A global mass-to-light ratio of 11 Msun/LB is found suggesting that dark matter in the South Polar Group is concentrated around the member galaxies. Condon (1987) lists NGC 300 as a possible VLA continuum detection at 1.49 GHz.