The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations

Details The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations

2004-10-24

arxiv.org/abs/astro-ph/0410577v1

Astrophys.J. 620 (2005) 257-273

Astronomy and Astrophysics

Astrophysics

AASTeX, 50 pages, 16 figures (four bitmapped for arXiv), 8 tables; accepted to ApJ

Scientific paper

10.1086/427018

Full-polarization MERLIN and VLBA observations of the 1720 MHz maser emission from the OH molecule in the supernova remnant W28 are presented. Zeeman splitting (|B| \approx 0.75 mG) has been directly resolved between right- and left-circularly polarized spectra for the first time. Linear-polarization position angles and circular-polarization Zeeman splitting observed in the maser emission permit interpretation of a comprehensive picture of the magnetic field at the supernova/molecular cloud interface marked by the masers. We find the post-SNR-shock magnetic field to be well-ordered over the ~1 pc covered by the maser region (compared with the approximately 30-pc diameter of the entire SNR) and well-aligned with the shock front that is traced by synchrotron radiation and molecular emission. Based on MERLIN data having a resolution of 200 mas and VLBA data with a resolution of 15 mas, the masers are measured to have deconvolved angular sizes of 90 to 350 mas (225 to 875 AU) with compact cores 20 mas (50 AU) in size, consistent with theoretical expectation and previous observations.

Affiliated with

Also associated with

No associations

Rating

The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations 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 The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The OH (1720 MHz) Supernova Remnant Masers in W28: MERLIN and VLBA Polarization Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-188036