DR 21 (W 75 S)

Region of recent star formation in our Galaxy: continuum emission at 2 cm from the thermal radio source DR 21 observed at a resolution of 2 arcsec. The intesnsity is color-coded from blue (> 50 to 200 mJy/beam) to red (> 400 to a maximum of 600 mJy/beam). DR 21 is comprised of four ultracompact HII regions, each of which is excited by a recently-formed hot O or B star. The most intense HII region C (bottom) is about 10 arcsec across or 0.3 light-years (at a distance of 6000 light-years).

Observing run - 1983 May 14 & 16 at the VLA in the C-configuration using 17 antennas. Type of observation - spectral line mapping.

Legacy Astronomical Images

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Legacy Astronomical Image

DR21

H.R. Dickel, A.F. Lubenow, W.M. Goss, A.H. Rots

Very Large Array (VLA)

1983-05-16

continuum

U

2.0 cm

15 GHz

RA 20:37:14.300, Dec: 42:9:3.000 (B1950)

0.016700 x 0.016700 degrees

Contact the archivist for a high resolution tif of this image.

Galactic Sources Series

Star Forming Regions Unit