New look at a bright stellar nursery

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This composite combines radio (orange) and infrared pictures of the W49A molecular cloud, the place younger stars are forming. Credit: DePree, et al.; Sophia Dagnello, NRAO/AUI/NSF; Spitzer/NASA.

This overlay exhibits radio (orange) and infrared pictures of a large molecular cloud known as W49A, the place new stars are being fashioned. A workforce of astronomers led by Chris DePree of Agnes Scott College used the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) to make new, high-resolution radio pictures of this cluster of still-forming, huge stars. W49A, 36,000 light-years from Earth, has been studied for a lot of a long time, and the brand new radio pictures revealed some tantalizing modifications which have occurred since an earlier set of VLA observations in 1994 and 1995.

The VLA radio pictures present the form and motion of large clouds of ionized hydrogen fuel fashioned by the extraordinary ultraviolet radiation from younger stars. Comparing outdated and new VLA pictures of those ionized areas has proven modifications indicating new exercise in a few of the areas. This new exercise consists of a slim, fast-moving jet in a single area, supersonic fuel motions in three others, and an sudden discount within the radio brightness in one other.

The astronomers, who reported their findings within the Astronomical Journal, plan to proceed observing this area usually to trace modifications that can reveal new particulars in regards to the complicated processes of star formation and interactions of the outflows from younger stars.


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More info:
C. G. De Pree et al. Time-variable Radio Recombination Line Emission in W49A, The Astronomical Journal (2020). DOI: 10.3847/1538-3881/abba27

Provided by
National Radio Astronomy Observatory


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New look at a bright stellar nursery (2021, May 4)
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