The Local Volume HI Survey (LVHIS)

NGC 625

NGC 625 (HIPASS J0135-41) is a Magellanic barred spiral galaxy at a TRGB distance of 3.89 ± 0.22 Mpc (Cannon et al. 2003). Its nearest neighbour is the dwarf irregular galaxy ESO 245-G005 (HIPASS J0145-43) at a projected distance of 170.3 arcmin. Our ATCA data show HI emission extending well beyond the stellar disc, including a peculiar HI feature on the western side, and a complex velocity field. The latter shows two HI components, likely a rotating disc (PA ~ 90 degr) along the major axis and an equally prominent kinematic feature along the minor axis. Cote et al. (2000) find that NGC 625's dominant HI velocity gradient is along the minor axis and speculate whether a recent merger or accretion event could have led to the peculiar kinematics of the HI disc. Using higher resolution observations, Cannon et al. (2004) show that the velocity gradient is due to outflowing HI gas. NGC 625 is also classified as a `blue amorphous galaxy' (Marlowe, Meurer & Heckman 1999), suggesting a recent burst of star formation.

Reference: Koribalski et al. 2018 * LVHIS database * LVHIS homepage * next

Last updated on 18 Feb 2018. © Copyright CSIRO