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
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