IC 4247 (HIPASS J1326-30)
is a dwarf irregular galaxy in the M83 sub-group with a TRGB} distance
of 4.97 ± 0.49 Mpc (Karachentsev et al. 2007). Its systemic velocity is
420 km/s (Banks et al. 1999; Minchin et al. 2003). IC 4247's nearest neighbours
are AM 1321-304 (45.8 arcmin), HIPASS J1321-31 (100.5 arcmin), KKs 54 (113.2
arcmin) and M 83 (136.6 arcmin); projected distances are given in brackets. Our
low-resolution ATCA HI data show a marginally resolved source with a velocity
gradient along the major axis. Higher resolution ATCA HI images reveal a
tear-drop shaped gas distribution, hinting at tidal interactions. We measure
FHI = 3.3 Jy km/s, in agreement with HIDEEP (Minchin et al. 2003),
and derive an HI mass of 1.9 × 107 M☉. Lee et
al. (2007) measure the properties of two HII regions in IC 4247. There are
luminous AGB stars, helium-burning stars and some early type stars detected in
this galaxy, indicating ongoing star formation. A detailed analysis of its star
formation history shows the galaxy was constantly forming stars during its
lifetime (Crnojevic et al. 2011).
Reference:
Koribalski et al. 2018
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