ESO 379-G007 (HIPASS
J1154-33) is a dwarf irregular galaxy at a TRGB distance of 5.22
± 0.52 Mpc (Karachentsev et al. 2002), located in the outskirts of the
Cen A group. The stellar core appears to be embedded in a low-surface
brightness disc, which is somewhat extended to the east. Its nearest neighbour
is likely ESO 379-G024 (181.6 arcmin away), discussed below. Our ATCA data
show the HI distribution and velocity field to be somewhat asymmetric, with
the eastern side more diffuse and extended than the western side. We measure
FHI = 4.8 Jy km/s and derive MHI = 3.1 ×
107 M☉. Begum et al. (2008) observed ESO 379-G007
as part of the FIGGS project. They measure an HI diameter of 3.6 arcmin and
an HI flux density of FHI = 5.0 ± 0.5 Jy km/s, in agreement
with our HIPASS and ATCA measurements. Bouchard et al. (2009) find just one
HII region, located ~10 arcsec west of the optical centre. The galaxy shape
and kinematics suggest that ram pressure or tidal forces may play a role and
could possibly be responsible for the offset star-forming region.
Reference:
Koribalski et al. 2018
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