HIPASS J1321-31
(KK 195) is an unusual dwarf galaxy at a TRGB distance of 5.22 ±
0.30 Mpc (Pritzl et al. 2003). Its stellar body (diameter ~70 arcsec) is very
faint and diffuse; no Hα emission was detected (Banks et al. 1999,
Meurer et al. 2006, Grossi et al. 2007). Using our ATCA HI data we determine
a center position of α,δ(J2000) = 13:21:09.4, -31:32:01.2, just
east of the stellar body. Faint GALEX UV emission is also detected.
The ATCA HI distribution is resolved and shows an east-west velocity gradient.
Grossi et al. (2007) detect only the bright HI component, which is located
to the south-east of the optical centre, while we find further HI emission
to the west. We measure FHI = 5.2 Jy km/s, in agreement with HIPASS
(Koribalski et al. 2004), and derive = MHI = 3.3 ×
107 M☉. HIPASS J1321-31 has a high
MHI/LB
ratio of 4.6. Begum et al. (2008) observed HIPASS J1321-31 as part of the
FIGGS project. They measure an HI diameter of 5 arcmin and an HI flux density
of FHI = 4.8 ± 0.5 Jy km/s, slightly lower than our HIPASS
and ATCA measurements.
Reference:
Koribalski et al. 2018
* LVHIS database
* LVHIS homepage
* next