Speaker
Description
The 4.765 GHz OH masers in Mon R2 IRS 3 region are the only 4.7 GHz OH masers to exhibit linear polarisation. Linear polarisation is not expected for this maser transition and its origin is unclear. Recent flaring of the OH masers has been monitored using both the HartRAO and Green Bank single-dish radio telescopes and imaged using the e-MERLIN array. Observations show a first detection of circular polarisation for the masers and re-detection of the linear polarisation but at different values to the previous detections. The linear polarisation changes over time – something which has not previously been reported for any masers – with the changes appearing to follow a regular pattern. The methanol masers in this region show similar polarisation changes, and could assist in providing an understanding of the origin of the polarisation. The relative positions of the OH and methanol masers and their polarisation, together with potential origin of the polarisation will be presented.
| Stream | Science |
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