Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.304..877s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 4, pp. 877-882.
Astronomy and Astrophysics
Astronomy
14
Masers, Polarization, Techniques: Interferometric, Circumstellar Matter, Stars: Individual: R Crt, Stars: Magnetic Fields
Scientific paper
OH maser emission from the circumstellar envelope of the semiregular variable star R Crt has been imaged in all Stokes parameters using the MERLIN array. The 1665- and 1667-MHz emission has a compact structure with an angular extent less than 0.2 arcsec. The combined 1665- and 1667-MHz data can be fitted with a thin-shell model of angular radius 0.14 +/- 0.04 arcsec. There is a systematic displacement between the blueshifted emission, which tends to lie to the south, and the redshifted emission, which lies mainly to the north. The polarization properties of the blue- and redshifted emission also differ markedly. Linear polarization is observed in the blueshifted 1667-MHz emission only, while there are spatial separations between the maxima of left and right circular polarization for the blueshifted emission. It is suggested that magnetic effects may be responsible both for the polarization asymmetries and for the front-to-back asymmetries in the OH envelope.
Cohen Richard J.
Richards Anita M. S.
Szymczak Marian
No associations
LandOfFree
MERLIN polarimetry of the OH maser emission from R Crateris 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 MERLIN polarimetry of the OH maser emission from R Crateris, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MERLIN polarimetry of the OH maser emission from R Crateris will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-891682