All Figures

$\begin{figure} \par\epsfig{file=H4528F1.ps,width=8.8cm}\end{figure}$ Figure 1: The integrated spectrum for GR8 obtained from the 40 $''\times 38''$ data cube. The channel separation is 1.65 km s^-1. Integration of the profile gives a flux integral of 9.0 Jy km s^-1 and an HI mass of $\sim$ $10.3\times{10}^{6}~M_\odot$ . The dashed line shows a Gaussian fit to the profile.
Open with DEXTER

In the text

$\begin{figure} \par\epsfig{file=H4528F2.ps,width=8.8cm}\end{figure}$ Figure 2: The digitized Palomar Sky Survey image of GR8 (greyscales) with the GMRT $25{''} \times 25{''}$ resolution integrated HI emission map (contours) overlayed. The contour levels are 0.005, 0.076, 0.146, 0.217, 0.288, 0.359, 0.429, 0.500, 0.571, 0.642 and 0.665 Jy/Bm km s^-1
Open with DEXTER

In the text

$\begin{figure} \par\epsfig{file=H4528F3.ps,width=8.8cm}\end{figure}$ Figure 3: Integrated HI emission at 4 $''\times 3''$ resolution, (grey scales and contours). The contour levels are 0.002, 0.016, 0.030, 0.044 and 0.058 Jy/Bm km s^-1. The locations of the HII regions identified by Hodge et al. (1989) are indicated by crosses.
Open with DEXTER

In the text

$\begin{figure} \par\epsfig{file=H4528F4.ps,width=8.8cm}\end{figure}$ Figure 4: The HI velocity field of GR8 at $25{''} \times 25{''}$ arcsec resolution. The contours are in steps of 1 km s^-1 and range from 210.0 km s^-1 to 225.0 km s^-1.
Open with DEXTER

In the text

$\begin{figure} \par\epsfig{file=H4528F5.ps,width=18cm}\end{figure}$ Figure 5: A) The $25{''} \times 25{''}$ resolution moment 1 map. The contour levels go from 210 to 225 km s^-1 in steps of 1 km s^-1. B) The velocity field obtained using the rotation curve of Carignan et al. (1990). Note that we have further assumed that the HI disk is intrinsically elliptical, with an axis ratio of 2:1. See the text for more details. The contours levels in this and succeeding panels are from 213 to 225 km s^-1 in steps of 1 km s^-1. C) The model velocity field with only expansion motion in the gas. The expansion velocity used to obtain the model is given in panel F). See also the discussion in the text. D) The model velocity field with both expansion and rotation motions in the gas. The expansion is the same as in panel C). The assumed rotation curve is linear and rises to a maximum of 6 km s^-1 at the edge of the galaxy. E) The model velocity field with rotational and asymmetric expansion motions. The rotational velocity is the same as used in panel D), however the expansion curve (while similar in form to that in panels C) and D) has been scaled (in galacto-centric distance but not amplitude). F) Expansion curve used to obtain the model velocity field. See the text for more details.
Open with DEXTER

In the text

$\begin{figure} \par\epsfig{file=H4528F1.ps,width=8.8cm}\end{figure}$	Figure 1: The integrated spectrum for GR8 obtained from the 40 $''\times 38''$ data cube. The channel separation is 1.65 km s^-1. Integration of the profile gives a flux integral of 9.0 Jy km s^-1 and an HI mass of $\sim$ $10.3\times{10}^{6}~M_\odot$ . The dashed line shows a Gaussian fit to the profile.
Open with DEXTER

$\begin{figure} \par\epsfig{file=H4528F2.ps,width=8.8cm}\end{figure}$	Figure 2: The digitized Palomar Sky Survey image of GR8 (greyscales) with the GMRT $25{''} \times 25{''}$ resolution integrated HI emission map (contours) overlayed. The contour levels are 0.005, 0.076, 0.146, 0.217, 0.288, 0.359, 0.429, 0.500, 0.571, 0.642 and 0.665 Jy/Bm km s^-1
Open with DEXTER

$\begin{figure} \par\epsfig{file=H4528F3.ps,width=8.8cm}\end{figure}$	Figure 3: Integrated HI emission at 4 $''\times 3''$ resolution, (grey scales and contours). The contour levels are 0.002, 0.016, 0.030, 0.044 and 0.058 Jy/Bm km s^-1. The locations of the HII regions identified by Hodge et al. (1989) are indicated by crosses.
Open with DEXTER

$\begin{figure} \par\epsfig{file=H4528F4.ps,width=8.8cm}\end{figure}$	Figure 4: The HI velocity field of GR8 at $25{''} \times 25{''}$ arcsec resolution. The contours are in steps of 1 km s^-1 and range from 210.0 km s^-1 to 225.0 km s^-1.
Open with DEXTER