The Local Volume HI Survey

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 F_HI = 16.5 Jy km/s, lower than the HIPASS F_HI of 21.1 ± 3.2 Jy km/s (Koribalski et al. 2004), and derive M_HI = 8.3 × 10⁷ M_☉. We calculate an HI mass to light ratio of M_HI/L_B = 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 v_rot = 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 * LVHIS database * LVHIS homepage * next