W49A - Ultracompact HII Regions

https://www.nrao.edu/archives/plugins/Dropbox/files/W49A-UltracompactHII_hi.jpg

Description

Views of the ultracompact (UC) HII regions in W49A with the full resolution of the VLA at 7 mm (beam =0.04") are inset in the 3.6 cm image of the W49A region. The 7 mm image includes data collected from the A, B, and D configurations of the VLA over the past 3 years. Note that at this resolution and observing frequency, source A reveals a central shell . Source B breaks into a multiplicity of distinct sources, with B1 having an elongated morphology, and B2 a central shell of its own. The horizontal bar in each inset frame indicates 5000 AU.

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

W49A

Investigators

Chris De Pree, Miller Goss, Jack Welch, David Wilner

Telescope

Very Large Array (VLA)

Observation Date

2001-00-00

Type of Observation

continuum

Center of Image

RA 19:10:15.650, Dec: 9:6:5.500 (J2000)

Field of View

0.012500 x 0.006944 degrees

Link to journal article

Link to NRAO Newsletter article

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, “W49A - Ultracompact HII Regions,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33485.