SIMBAD references

2000ApJ...537..875B - Astrophys. J., 537, 875-890 (2000/July-2)

OH Zeeman magnetic field detections toward five supernova remnants using the VLA.


Abstract (from CDS):

We have observed the OH (1720 MHz) line in five galactic SNRs with the VLA to measure their magnetic field strengths using the Zeeman effect. We detected all 12 of the bright (Sν>200 mJy) OH (1720 MHz) masers previously detected by Frail et al. and Green et al. and measured significant magnetic fields (i.e., >3 σ) in 10 of them. Assuming that the ``thermal'' Zeeman equation can be used to estimate {mid}B{mid} for OH masers, our estimated fields range from 0.2 to 2 mG. These magnetic field strengths are consistent with the hypothesis that ambient molecular cloud magnetic fields are compressed via the SNR shock to the observed values. Magnetic fields of this magnitude exert a considerable influence on the properties of the cloud with the magnetic pressures (10–7-10–9–3) exceeding the pressure in the ISM or even the thermal pressure of the hot gas interior to the remnant. This study brings the number of galactic SNRs with OH (1720 MHz) Zeeman detections to 10.

Abstract Copyright:

Journal keyword(s): ISM: Clouds - ISM: individual (W51, G349.7+0.2, CTB 37A, CTB 33, G357.7-0.1) - ISM: Magnetic Fields - Masers - Polarization - Radio Lines: ISM

Nomenclature: Table 2: [BFG2000] W51C N (Nos 1-2), [BFG2000] G349.7+0.2 N (Nos 1-3), [BFG2000] CTB 37A N (Nos 1-5), [BFG2000] CTB 33 N (No. 1), [BFG2000] G357.7-0.1 N (No. 1).

Simbad objects: 34

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2000ApJ...537..875B and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact