TY - JOUR
T1 - The Local Volume Hi Survey
T2 - Galaxy kinematics
AU - Kirby, Emma M.
AU - Koribalski, Bärbel
AU - Jerjen, Helmut
AU - López-Sánchez, Ángel
PY - 2012/3
Y1 - 2012/3
N2 - We present a detailed analysis of the neutral hydrogen kinematics of 12 nearby dwarf irregular galaxies observed as part of the Local Volume Hi Survey conducted at the Australia Telescope Compact Array. For each galaxy we measure the disc parameters (inclination, position angle) and the Hi rotation curve. Six galaxies in our sample (AM0605-341, Argo Dwarf, ESO059-G001, ESO137-G018, ESO174-G?001 and ESO308-G022) have their atomic hydrogen distribution studied for the first time. AM0605-341 was found to have an extension of redshifted Hi which we propose is due to a tidal interaction with NGC2188. There is evidence that ESO215-G?009 has extraplanar Hi gas. We also compare the global galaxy properties, in particular the integrated Hi flux density and velocity widths of the observed Hi spectra, with the results from the low angular resolution Hi Parkes All Sky Survey. We discuss under what circumstances the 21cm emission-line profile can accurately predict the galaxies rotation velocity, an observational parameter crucial to study the classical and baryonic Tully-Fisher relations.
AB - We present a detailed analysis of the neutral hydrogen kinematics of 12 nearby dwarf irregular galaxies observed as part of the Local Volume Hi Survey conducted at the Australia Telescope Compact Array. For each galaxy we measure the disc parameters (inclination, position angle) and the Hi rotation curve. Six galaxies in our sample (AM0605-341, Argo Dwarf, ESO059-G001, ESO137-G018, ESO174-G?001 and ESO308-G022) have their atomic hydrogen distribution studied for the first time. AM0605-341 was found to have an extension of redshifted Hi which we propose is due to a tidal interaction with NGC2188. There is evidence that ESO215-G?009 has extraplanar Hi gas. We also compare the global galaxy properties, in particular the integrated Hi flux density and velocity widths of the observed Hi spectra, with the results from the low angular resolution Hi Parkes All Sky Survey. We discuss under what circumstances the 21cm emission-line profile can accurately predict the galaxies rotation velocity, an observational parameter crucial to study the classical and baryonic Tully-Fisher relations.
KW - Galaxies: dwarf
KW - Galaxies: individual: AM0605-341
KW - Galaxies: individual: Argo dwarf irregular
KW - Galaxies: individual: ESO215-G?009
KW - Galaxies: kinematics and dynamics
KW - Radio lines: galaxies
UR - http://www.scopus.com/inward/record.url?scp=84857657120&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2011.20103.x
DO - 10.1111/j.1365-2966.2011.20103.x
M3 - Article
SN - 0035-8711
VL - 420
SP - 2924
EP - 2943
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -