VLA HI Zeeman Observations of the Cygnus X Region: DR 22 And ON 2

Details VLA HI Zeeman Observations of the Cygnus X Region: DR 22 And ON 2 VLA HI Zeeman Observations of the Cygnus X Region: DR 22 And ON 2

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541526m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #415.26; Bulletin of the American Astronomical Society, Vol. 42, p.265

Astronomy and Astrophysics

Astronomy

Scientific paper

The Very Large Array in Socorro, New Mexico has been used to study the Zeeman Effect in the 21cm HI line seen in absorption against radio sources in the Cygnus X region. Cygnus X is geometrically favorable for Zeeman effect observations as the region lies along the mean field direction of the diffuse interstellar medium (ISM) of the galaxy. We present observations of two compact HII regions within Cygnus X, DR 22 and ON 2. The data show magnetic field strengths of the order -80 μG toward DR 22 alone with no significant detections toward ON 2. This information is used to estimate the magnetic energy of the DR 22 star-forming cloud, and allows for a complete analysis of the energetics of the region revealing the role of the magnetic field.
Support for this work was provided by the NSF PAARE program to South Carolina State University under award AST-0750814.

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