2007A&A...470..123K -
Astronomy and Astrophysics, volume 470, 123-135 (2007/7-4)
Optical BVI imaging and HI synthesis observations of the dwarf irregular galaxy ESO 364-G029.
KOUWENHOVEN M.B.N., BUREAU M., KIM S. and DE ZEEUW P.T.
Abstract (from CDS):
As part of an effort to enlarge the number of well-studied Magellanic-type galaxies, we obtained broadband optical imaging and neutral hydrogen radio synthesis observations of the dwarf irregular galaxy
ESO364-G029. The optical morphology characteristically shows a bar-like main body with a one-sided spiral arm, an approximately exponential light distribution, and offset photometric and kinematic centers. The HI distribution is mildly asymmetric and, although slightly offset from the photometric center, roughly follows the optical brightness distribution, extending to over 1.2 Holmberg radii (where µ
B=26.5mag/arcsec
2). In particular, the highest HI column densities closely follow the bar, one-arm spiral, and a third optical extension. The rotation is solid-body in the inner parts but flattens outside of the optical extent. The total HI flux F
HI=23.1±1.2Jy.km/s, yielding a total HI mass M
HI=(6.4±1.7)x10
8M
☉ (for a distance D=10.8±1.4Mpc) and a total HI mass-to-blue-luminosity ratio M
HI/L
B=(0.96±0.14)M
☉/L
B,☉ (distance independent). The HI data suggest a very complex small-scale HI structure, with evidence of large shells and/or holes, but deeper observations are required for a detailed study. Follow-up observations are also desirable for a proper comparison with the Large Magellanic Cloud, where despite an optical morphology very similar to
ESO364-G029 the HI bears little resemblance to the optical.
Abstract Copyright:
∼
Journal keyword(s):
galaxies: individual: ESO364-G029 - galaxies: irregular - galaxies: photometry - galaxies: kinematics and dynamics - galaxies: structure - galaxies: ISM
Simbad objects:
40
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2007A&A...470..123K and select 'bookmark this link' or equivalent in the popup menu