Universe  ID: 10878

Gamma rays in the Heart of Cygnus

Located in the vicinity of the second-magnitude star Gamma Cygni, the Cygnus X star-forming region was discovered as a diffuse radio source by surveys in the 1950s. Now, a study using data from NASA's Fermi Gamma-ray Space Telescope finds that the tumult of star birth and death in Cygnus X has managed to corral fast-moving particles called cosmic rays.

Cosmic rays are subatomic particles — mainly protons — that move through space at nearly the speed of light. In their journey across the galaxy, the particles are deflected by magnetic fields, which scramble their paths and make it impossible to backtrack the particles to their sources. Yet when cosmic rays collide with interstellar gas, they produce gamma rays — the most energetic and penetrating form of light — that travel to us straight from the source.

The Cygnus X star factory is located about 4,500 light-years away and is believed to contain enough raw material to make two million stars like our sun. Within it are many young star clusters and several sprawling groups of related O- and B-type stars, called OB associations. One, called Cygnus OB2, contains 65 O stars — the most massive, luminous and hottest type — and nearly 500 B stars. These massive stars possess intense outflows that clear out cavities in the region's gas clouds. A tangled web of shockwaves associated with this process impedes the movement of cosmic rays throughout the region. Cosmic rays striking gas nuclei or photons from starlight produce the gamma rays Fermi detects.

The release on NASA.gov is here.

 

Related


For More Information

http://www.nasa.gov/mission_pages/GLAST/news/cygnus-cocoon.html


Credits

Scott Wiessinger (USRA): Lead Animator
Scott Wiessinger (USRA): Video Editor
Scott Wiessinger (USRA): Producer
Francis Reddy (University of Maryland College Park): Lead Science Writer
Francis Reddy (University of Maryland College Park): Graphics
Please give credit for this item to:
NASA/Goddard Space Flight Center. However, each image should be credited as indicated above.

Short URL to share this page:
https://svs.gsfc.nasa.gov/10878

Mission:
Fermi Gamma-ray Space Telescope

Data Used:
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of these series:
Astrophysics Stills
Astrophysics Visualizations

Goddard TV Tape:
G2011-126 -- Gamma rays in the Heart of Cygnus

Keywords:
NASA Science >> Universe
SVS >> Space Science
SVS >> Star
SVS >> Supernova
SVS >> Fermi
SVS >> Space
SVS >> Edited Feature
SVS >> Astrophysics
SVS >> Hyperwall
GCMD >> Earth Science >> Spectral/Engineering >> Gamma Ray
SVS >> Satellite
SVS >> Infrared
SVS >> HDTV

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0