New look at a bright stellar nursery

0

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

This overlay shows radio (orange) and infrared images of a giant molecular cloud called W49A, where new stars are being formed. A team 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 images of this cluster of still-forming, massive stars. W49A, 36,000 light-years from Earth, has been studied for many decades, and the new radio images revealed some tantalizing changes that have occurred since an earlier set of VLA observations in 1994 and 1995.

The VLA radio images show the shape and movement of giant clouds of ionized hydrogen gas formed by the intense ultraviolet radiation from young stars. Comparing old and new VLA images of these ionized regions has shown changes indicating new activity in some of the regions. This new activity includes a narrow, fast-moving jet in one region, supersonic gas motions in three others, and an unexpected reduction in the radio brightness in another.

The astronomers, who reported their findings in the Astronomical Journal, plan to continue observing this region regularly to track changes that will reveal new details about the complex processes of star formation and interactions of the outflows from young stars.


Violent cosmic explosion revealed by ALMA: The merging of massive protostars?


More information:
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


Citation:
New look at a bright stellar nursery (2021, May 4)
retrieved 4 May 2021
from https://phys.org/news/2021-05-bright-stellar-nursery.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

FOLLOW US ON GOOGLE NEWS

 

Read original article here

Denial of responsibility! Samachar Central is an automatic aggregator of the all world’s media. In each content, the hyperlink to the primary source is specified. All trademarks belong to their rightful owners, all materials to their authors. If you are the owner of the content and do not want us to publish your materials, please contact us by email – admin@samacharcentral.com. The content will be deleted within 24 hours.

Leave a comment