W49A - Ultracompact HII Regions
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.
Legacy Astronomical Images
NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.
Legacy Astronomical Image
Chris De Pree, Miller Goss, Jack Welch, David Wilner
Very Large Array (VLA)
Type of Observation
Center of Image
RA 19:10:15.650, Dec: 9:6:5.500 (J2000)
Field of View
0.012500 x 0.006944 degrees
Contact the archivist for a high resolution tif of this image.
Galactic Sources Series
Star Forming Regions Unit
Legacy Astronomical Images, “W49A - Ultracompact HII Regions,” NRAO Archives, accessed December 3, 2021, https://www.nrao.edu/archives/items/show/33485.