The Local Volume HI Survey (LVHIS)

NGC 5264

NGC 5264 (HIPASS J1341-29) is a Magellanic irregular galaxy of type IB(s)m), located very close to the eastern tidal arm of M 83. Our ATCA HI maps reveal an extended, slowly rotating, possibly warped disc. The independent TRGB distance estimates for NGC 5264 (4.53 ± 0.45 Mpc, Karachentsev et al. 2002) and M 83 (4.92 ± 0.10 Mpc) suggest they may be physically close and are likely tidally interacting. Their respective Local Group velocities are 300 km/s (NGC 5264) and 332 km/s (M 83). NGC 5264 lies ~1 degree from the centres of M 83 (HIPASS 1337-29) and IC 4316 (HIPASS J1340-28). Our ATCA HI maps show a well-resolved HI distribution and rather peculiar velocity field. We measure FHI = 10.3 Jy km/s, in agreement with HIPASS and HIDEEP (Koribalski et al. 2004, Minchin et al. 2003), and derive MHI = 5.0 × 107 M. Very short VLA observations by Simpson & Gottesman (2000) show HI emission in an asymmetric ring-like distribution or central depression; they detect only ~40% of the total HI flux. Lopez-Sanchez et al. (2012) study the nearby starburst dwarf galaxy NGC 5253, south of M 83, and provide a comparison with its dwarf neighbours, incl. NGC 5264. For a separation of 80 kpc between NGC 5264 and M 83 the tidal radius at the position of NGC 5264 is ~7 kpc, similar to the size of the ATCA HI distribution. GALEX UV and Hα emission is detected in NGC 5264, which is dominated by two bright HII regions; SFR ~ 0.02 M/yr (Lee et al. 2009). ATCA 20-cm radio continuum emission is detected (Shao et al. 2017).

Reference: Koribalski et al. 2018 * LVHIS database * LVHIS homepage * next

Last updated on 18 Feb 2018. © Copyright CSIRO