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New water maser source near HW3d in the massive star-forming region Cepheus A

Published online by Cambridge University Press:  16 July 2018

Jeong-Sook Kim  and
Soon-Wook Kim
Jeong-Sook Kim
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea email: [email protected], [email protected]
Soon-Wook Kim
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea email: [email protected], [email protected] Korea University of Science and Technology, Daejeon 34113, Republic of Korea
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Abstract

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Cepheus A is the second nearest high mass star-forming region after Orion. It is characterized by the presence of several phenomena, such as a complex molecular outflow, and multiple radio continuum sources, known as HW sources. The radio continuum and water maser emission have been detected toward HW2, HW3b and HW3d regions, and all of them are considered harboring young stellar objects. In 2014, we performed KaVA observations and detected a new bright maser feature, ~700 mas apart from HW3d, which has not been detected with previous VLBI observations. The relative proper motion of the new maser feature is faster than other regions. It can be a clue for a newly forming star. Alternatively, it may be caused by outflow shock from the star-forming regions such as HW3d or HW3c.

Keywords

masersstars: formationISM: individual objects: Cepheus AISM: jets and outflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 297 - 298
Copyright
Copyright © International Astronomical Union 2018 

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