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himap - Construct galactic XY/TR (Z) MAP from an LV(B) diagram
himap
[parameter=value]
himap converts a galactic position-velocity
map into a 2D galactic (top-view) surface density map or density cube. The
gridding is done in a polar (THETA-RADIUS) or cartesian (X-Y) grid, and
if choosen, Z in the vertical dimension. Coordinates are always normalized
to the solar radius, which is one of the user definable parameters.
In both
a polar (THETA-RADIUS) and cartesian (X-Y) grid the sun is located at (0,1).
The sense of galactic rotation is clockwise in the cartesian X-Y, or in
increasing THETA in the polar grid.
The following parameters are
recognized in any order if the keyword is also given:
- in=image_in
- Input
VL(B) image. This must be an image(5NEMO)
file. No default.
- out=image_out
- Optional output image, will be in image(5NEMO)
format. If no name supplied,
no output image is generated. Default: none.
- rotcur=table_in
- Input rotation
curve in (ascii) table(5NEMO)
format, with radius (in kpc) in column 1,
and velocity (in km/s) in column 2. Note that the table will internally
be normalized to (r0,v0). No default.
- xgrid=x1,x2,...
- Grid coordinates in image
X coordinates, using a nemoinp(3NEMO)
list expression. They are either normalized
X or THETA, depending on the gridding mode (see below).
- ygrid=y1,y2,...
- Grid
coordinates in image Y coordinates, using a nemoinp(3NEMO)
list expression.
They are either normalized Y or normalized RADIUS, depending on the gridding
mode (see below).
- zgrid=z1,z2,...
- Grid coordinates in image Z coordinates,
using a nemoinp(3NEMO)
list expression. They are normalized with the solar
radius (r0, see below). By default only one plane (z=0) is gridded, all
emission is averaged in Z (or b for that matter).
- r0=r0_kpc
- Solar Radius
in kpc. [Default: 8].
- v0=v0_km/s
- LSR velocity in km/s. [Default: 220].
- grid=p|c
- Output mode: polar (theta,r) or cartesian (x,y). [Default: polar].
- near=t|f
- Allow pixels to assume the value of the nearest edge, in case they are
found outside the VL/LV map? [Default: false].
- tab=table_out
- Optional output
table of {theta,radius,l,v,l_grid,v_grid,surden,vrot}. Default: none.
hispectrum(1NEMO)
, image(3NEMO)
, fitsccd(1NEMO)
, hispectrum(1NEMO)
,
fitshicube(1NEMO)
Peter Teuben
19-Feb-93 V0.1 Created PJT
7-oct-94 V1.1b added near=, more messages PJT
10-oct-95 V1.2 added zrange= and 3D support PJT
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