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  • Ramstedt, S., et al. (author)
  • TWINKLING STARS The disappearing SiO masers of W Aql
  • 2012
  • In: Proceedings of the International Astronomical Union. - 1743-9213 .- 1743-9221. ; 8:5287, s. 260-261
  • Conference paper (peer-reviewed)abstract
    • W Aql is a binary S-type AGB star showing SiO maser emission. The dust distribution around the star is asymmetric, possibly indicating gravitational interaction between the binary pair. There are indications that the gas distribution also exhibits asymmetries. To investigate the source of the circumstellar structures, we applied for and were rewarded VLBI time to map the distribution of the SiO masers around this source and to constrain the presence and distribution of a possible magnetic field. Using VERA observations we also aim at measuring an accurate parallax to determine the binary separation, however, from showing peak emission of 21 Jy in June 2010, the SiO(1-0) v=1 line at 43 GHz has now disappeared. We find no correlation with the stellar pulsational period.
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Type of publication
conference paper (1)
Type of content
peer-reviewed (1)
Author/Editor
Vlemmings, Wouter, 1 ... (1)
Olofsson, Hans, 1952 (1)
Mohamed, S (1)
Ramstedt, S. (1)
Choi, Y.K. (1)
University
Chalmers University of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2012 (1)

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