ESO 444-G084 (HIPASS
J1337-28) is a dwarf irregular galaxy located at a TRGB distance of
4.61 ± 0.46 Mpc (Karachentsev et al. 2002). Its closest neighbours are
IC 4316 (64.2 arcmin), UGCA 365 (72.2 arcmin), M 83 (109.3 arcmin) and NGC 5264
(125.4 arcmin), all members of the M 83 group. ESO444-G084 is located 147 kpc
north of the massive spiral galaxy M 83. Our ATCA HI moment maps reveal a
symmetric disc, at least twice as large as the stellar B25
extent, with a significant (~35 degr) warp of the outer parts (see also Cote
et al. 2000). We measure FHI = 16.5 Jy km/s, lower than the HIPASS
FHI of 21.1 ± 3.2 Jy km/s (Koribalski et al. 2004), and
derive MHI = 8.3 × 107 M☉.
We calculate an HI mass to light ratio of MHI/LB = 2.1,
well above the typical value for dwarf irregular galaxies (Roberts & Haynes
1994; see also Warren et al. 2004). Cote et al. (2000) obtain an HI rotation
curve which reaches vrot = 63.1 km/s at a radius of 3.2 kpc. Cote
et al. (2009) estimate an SFR of 0.8 × 10-3
M☉/yr.
Reference:
Koribalski et al. 2018
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