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The VLA Galactic Plane Survey

VGPS Image Gallery

A Majestic Gas Shell Revealed by the VLA


Image courtesy of NRAO/AUI and Jayanne English (U. Manitoba) & Jeroen Stil, supported by Russ Taylor (U. Calgary)

This image from the VLA Galactic Plane Survey Stil et al. (2006) AJ 132, 1158 won the 2006 NRAO/AUI image contest for the best radio astronomy image.


The location of the shell in our Galaxy with respect to the Sun (circle with dot in the panel on the right). The location of the shell is marked by the blue diamond. We believe the shell is located in the Perseus spiral arm as shown in this image. The topmost panel shows a wide panorama of radio emission from hot gas in the Galactic plane, while the shell itself is made up of much cooler gas. The blue rectangle indicates the field of view centered on the shell (lower left).

Sample image of VGPS HI mosaic 037 at VLSR = 51.8 km/s. Data from the Very Large Array (VLA) and the Robert C. Byrd Green Bank Telescope (GBT) were combined to obtain this image that shows the Galactic neutral hydrogen on all scales down to 1 arcminute.


Sample images of VGPS 21-cm continuum at 1 arcminute resolution. The upper frames show in detail the areas outlined in the panoramic view below. These images were made combining VLA data with the 21-cm continuum survey of Reich et al. (1990)

VGPS HI images of a neutral hydrogen shell in the inner Galaxy. This shell has a radius of 15 pc at a distance of 7.8 kpc. Data from the Very Large Array (VLA) and the Robert C. Byrd Green Bank Telescope (GBT) were combined to obtain images that show the Galactic HI distribution on all scales down to the resolution of 1 arcminute. The LSR velocity of gas in km/s is indicated in the lower right corner of each panel. From: Stil et al. (2003), ApJ, submitted