DR 21 (W 75 S)

https://www.nrao.edu/archives/plugins/Dropbox/files/DR21_VR47C_hi.jpg

Description

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.

Creator

Legacy Astronomical Images

Rights

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

Type

Legacy Astronomical Image

Object Name

DR21

Investigators

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

Telescope

Very Large Array (VLA)

Observation Date

1983-05-16

Type of Observation

continuum

Band

U

Wavelength

2.0 cm

Frequency

15 GHz

Center of Image

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

Field of View

0.016700 x 0.016700 degrees

Notes

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

Series

Galactic Sources Series

Unit

Star Forming Regions Unit

Citation

Legacy Astronomical Images, “DR 21 (W 75 S),” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33492.