The Local Volume HI Survey (LVHIS)

HIPASS J1321-31

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

Last updated on 18 Feb 2018. © Copyright CSIRO