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Linear polarisation of Class I methanol masers in massive star formation regions

Published online by Cambridge University Press:  16 July 2018

Ji-hyun Kang
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Do-Young Byun
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Kee-Tae Kim
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Aran Lyo
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Jongsoo Kim
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Mi-kyoung Kim
Affiliation:
Korea Astronomy and Space Science Institute 776, Daedeokdae-ro, Yuseong-gu, Daejeon, Republic of Korea email: jkang@kasi.re.kr
Wouter Vlemmings
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
Boy Lankhaar
Affiliation:
Department of Earth and Space Sciences, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden
Gabriele Surcis
Affiliation:
INAF-Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius, Italy
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Abstract

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We present the results of the linear polarisation observations of methanol masers at 44 and 95 GHz towards 39 massive star forming regions (Kang et al. 2016). These two lines are observed simultaneously with the 21-m Korean VLBI Network (KVN) telescope in single dish mode. About 60% of the observed showed fractional polarisation of a few percents at least at one of the two transition lines. We note that the linear polarisation of the 44 GHz methanol maser is first detected in this study including single dish and interferometer observations. We find the polarisation properties of these two lines are similar as expected, since they trace similar regions. As a follow-up study, we have carried out the VLBI polarisation observations toward some 44 GHz maser targets using the KVN telescope. We present preliminary VLBI polarisation results of G10.34-0.14, which show consistent polarisation properties in multiple epoch observations.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2018 

References

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Linear polarisation of Class I methanol masers in massive star formation regions
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