The Local Volume HI Survey

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 F_HI = 43.5 Jy km/s, somewhat higher than the HIPASS F_HI (Koribalski et al. 2004), and derive M_HI = 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 v_rot = 71.2 km/s at R_max = 8.6 kpc (for i = 71.5 degr and PA = 29.2 degr) and M_dyn = 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 * LVHIS database * LVHIS homepage * next