Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008a%26a...487..247f&link_type=abstract
Astronomy and Astrophysics, Volume 487, Issue 1, 2008, pp.247-252
Astronomy and Astrophysics
Astrophysics
40
Magnetic Fields, Stars: Formation, Ism: Molecules, Turbulence, Polarization, Ism: Kinematics And Dynamics
Scientific paper
Aims: Magnetic fields play a primordial role in the star formation process. The Zeeman effect on the CN radical lines is one of the few methods of measuring magnetic fields in the dense gas of star formation regions. Methods: We report new observations of the Zeeman effect on seven hyperfine CN N = 1-0 lines in the direction of 14 regions of star formation. Results: We have improved the sensitivity of previous detections, and obtained five new detections. Good upper limits are also achieved. The probability distribution of the line-of-sight field intensity, including non-detections, provides a median value of the total field B_tot = 0.56 mG while the average density of the medium sampled is n(H_2) = 4.5 × 10^5cm-3. We show that the CN line probably samples regions similar to those traced by CS and that the magnetic field observed mostly pervades the dense cores. The dense cores are found to be critical to slightly supercritical with a mean mass-to-flux ratio M/Φ ˜ 1 to 4 with respect to critical. Their turbulent and magnetic energies are in approximate equipartition.
Crutcher Richard M.
Falgarone Edith
Paubert Gabriel
Troland Thomas H.
No associations
LandOfFree
CN Zeeman measurements in star formation regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CN Zeeman measurements in star formation regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CN Zeeman measurements in star formation regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1169766