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Polarization properties of R Cas SiO masers
| Content Provider | Scilit |
|---|---|
| Author | Assaf, K. A. Diamond, P. J. Richards, A. M. S. Gray, M. D. |
| Copyright Year | 2012 |
| Description | Silicon monoxide maser emission has been detected in the circumstellar envelopes of many evolved stars. It is a good tracer of the wind dynamics within a few stellar radii of the central star. We investigated the polarization morphology in the circumstellar envelope of an AGB star, R Cas, by using the VLBA to map the linear and circular polarization of the v=1, J=1-0 SiO maser transition during 23 epochs over two stellar cycles. The average fractional circular polarization is a few percent. The average fractional linear polarization per epoch is 11–58%, but some isolated features exceed 100%, probably because the total intensity emission is smoother and more resolved-out. The maser electric polarization vector angle has a preferrential tendency to be either parallel or perpendicular to the radial direction to the star. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/54522EFEE7BF6CB6F8886A8D51C7C467/S1743921312007028a.pdf/div-class-title-polarization-properties-of-r-cas-sio-masers-div.pdf |
| Ending Page | 239 |
| Page Count | 5 |
| Starting Page | 235 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921312007028 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S287 |
| Volume Number | 8 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Astronomy and Astrophysics Circular Polarization Circumstellar Envelopes Average Fractional Sio Maser |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
