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Name

rotcur - geometric parameters for some disk galaxies

Description

For a few standard galaxies we list their geometric parameters. Programs such as rotcur(1NEMO) and rvstack(1NEMO) will need these.

In the table below the center of rotation is listed in RA/DEC, as well as the VLSR (in km/s), followed by the inclination and the kinematic major axis (as defined by the receding side), and the near side minor axis (receding velocities if outflow along Z axis). If the galaxy has a bar, it’s relative position angle is also listed, both of these relative to the (kinematic) PA, add these numbers to get the PA of that feature.

As always in astronomy, position angles are measures from North, counterclockwise through East to South and West.

Data

A few galaxies, biased what PJT has worked on.
galaxy    RA(J2000)    DEC(J2000)    VLSR    INC    PA_kin    dPA_near    dPA_bar
-    -    rotation    center      km/s    deg    deg    d-deg    d-deg
    
NGC253    00:47:33.134    -25:17:19.68    241    79.8    233    +90    +15:
NGC253    00:47:35.2    -25:17:07.6    241    76.4    230    +90    +18:    
NGC1097    2:44:11.1    -30:29:03.0    1280    46    134    +90    +10:
NGC1365    3:31:42.0    -36:18:18    1625    46    222    +90    +30:
NGC1530    4:23:26.1    +75:17:43.6    2450    55    199    +90    +80:
NGC2347    109.016250    +64.710800    4387    50      9    +90    n/a
NGC4321 hhmmss.ssss    ddmmdd.ssss    vvv    50:    150:    -90    n/a
NGC5728 14:42:23.9    -17:15:11.1    2801    60    33    +90     ~0:
NGC6503    17:49:26.30    +70:08:40.7    25    75    -60    -90    -80:

Another way of saying is that if PA_near = +90, flow is clock wise, and
-90 for
counter clock wise.
Values with : at the end means an eye estimate. Other values are from the
literature.

See Alsorotcur(1NEMO), rvstack(1NEMO)  AuthorPeter Teuben  Update History
11-may-2021    written        PJT
3-jun-2021    finalized first batch    PJT


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