ESO 137-G018 (HIPASS
J1620-60) appears to be a rather isolated, Magellanic type dwarf
irregular galaxy located at low Galactic latitude. Its TRGB distance is 6.40
± 0.48 Mpc (Karachentsev et al. 2007); there are no known neigbours
within 3 degr. Our ATCA data reveal a well-resolved, regularly rotating HI
disc that extends a factor two beyond the stellar body. We measure
FHI = 43.5 Jy km/s, somewhat higher than the HIPASS FHI
(Koribalski et al. 2004), and derive MHI = 4.2 ×
108 M☉. Bonne (2008), Kirby et al. (2012) and most
recently Kamphuis et al. (2015) obtained HI rotation curves. Using 3D FAT
Kamphuis et al. (2015) determine vrot = 71.2 km/s at Rmax
= 8.6 kpc (for i = 71.5 degr and PA = 29.2 degr) and Mdyn = 1.0
× 1010 M☉. Hα imaging by Kaisin et al.
(2007) reveals an extended disc of clumpy and diffuse ionised gas.
Reference:
Koribalski et al. 2018
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