Statistics – Computation
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adil...dw...01v&link_type=abstract
NCSA Astronomy Digital Image Library
Statistics
Computation
Angular Velocity, Computational Astrophysics, Disk Galaxies, Galactic Rotation, Inclination, Kinematics, Least Squares Method, Orbital Elements, Radial Velocity, Spiral Galaxies, Velocity Distribution
Scientific paper
This 21 cm cube is a textbook case of a spiral galaxy rotation curve. The AIPS task GAL was developed and debugged using this observation as the test data. The cube has also been used extensively by the AIPS Group for testing ``movie loop'' display code and for various visualization experiments. The 1.1 Jy quasar 1749 70.1 was within the primary beam at L band. The quasar totally dominated the dirty maps, its sidelobes being about 10x brighter than the 21 cm galaxy emission. The 6 MHz continuum map delivered with the cube was subtracted from each of the 31 planes of the cube, and the quasar disappeared completely. For more information on this study, please see the following reference: van Moorsel, G. A., and Wells, D. C. 1985, AJ, 90, 1038. The image and related TeX file come from the NRAO CDROM "Images From the Radio Universe" (c. 1992 National Radio Astronomy Observatory, used with permission).
van Moorsel Gustaaf A.
Wells Donald C.
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