A High-resolution Mosaic of the Neutral Hydrogen in the M81 Triplet
2019-03-01, 2019-03-01
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This dataset shows the distribution of neutral hydrogen in and around the M81 galaxy triplet (M81, M82, NGC 3077) and consists of a 3° × 3°, 105-pointing, high-resolution neutral hydrogen (H I) mosaic obtained with the Very Large Array C and D arrays. The data are described in the paper by de Blok et al. (2018).
Here we provide the following data products:
Cubes:
the natural-weighted cube of the VLA C+D mosaic: m81.nat.cube.fits
the robust-weighted cube of the VLA C+D mosaic: m81.rob.cube.fits
the natural-weighted cube using only D-array-like baselines: m81_D.nat.cube.fits
the natural-weighted and zero-spacing corrected data cube of the VLA C+D array and GBT single-dish data from Chynoweth et al. (2011): m81.zero.cube.fits
Moment maps:
natural-weighted zeroth (column density), first (velocity field) and second (velocity dispersion) moment maps of the VLA C+D mosaic: m81.nat.mom[0,1,2].fits
robust-weighted zeroth (column density), first (velocity field) and second (velocity dispersion) moment maps of the VLA C+D mosaic: m81.rob.mom[0,1,2].fits
natural-weighted zeroth, first and second moment maps of the "D-array" mosaic: m81_D.nat.mom[0,1,2].fits
zero-spacing corrected natural-weighted integrated HI map (zeroth-moment) of VLA C+D and GBT data: m81.zero.mom0.fits
Acknowledgements:
If you make use of these data please cite the original paper:
de Blok et al. (2018) - de Blok, W.J.G., Walter, F., Ferguson, A.M.N., et al. 2018, ApJ, 865, 26 (10.3847/1538-4357/aad557)