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OH masers in the Milky Way and Local Group galaxies in the SKA era
Citation
Etoka, S and Engels, D and Imai, H and Dawson, J and Ellingsen, S and Sjouwerman, L and van Langevelde, H, OH masers in the Milky Way and Local Group galaxies in the SKA era, Advancing Astrophysics with the Square Kilometre Array, 09-13 June 2014, Giardini Naxos, Italy, pp. 139-152. ISBN 978-1-909204-70-6 (2015) [Refereed Conference Paper]
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Copyright Statement
Copyright 2015 the Author Licensed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) http://creativecommons.org/licenses/by-sa/4.0/
Official URL: http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid...
Abstract
The intense line emission of OH masers is a perfect tracer of regions where new stars are born as
well as of evolved stars, shedding large amounts of processed matter into the interstellar medium.
From SKA deep surveys at 18 cm, where the maser lines from the ground-state of the OH
molecule arise, we predict the discovery of more than 20000 sources of stellar and interstellar
origin throughout the Galaxy. The study of this maser emission has many applications, including
the determination of magnetic field strengths from polarisation measurements, studies of stellar
kinematics using the precisely determined radial velocities, and distance determinations from
VLBI astrometry. A new opportunity to study shocked gas in different galactic environments is
expected to arise with the detection of lower luminosity masers. For the first time, larger numbers
of OH masers will be detected in Local Group galaxies. New insights are expected in structure
formation in galaxies by comparing maser populations in galaxies of different metallicity, as both
their properties as well as their numbers depend on it. With the full capabilities of SKA, further
maser transitions such as from excited OH and from methanol will be accessible, providing new
tools to study the evolution of star-forming regions in particular.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | star formation, masers |
| Research Division: | Physical Sciences |
| Research Group: | Astronomical sciences |
| Research Field: | Galactic astronomy |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the physical sciences |
| UTAS Author: | Ellingsen, S (Professor Simon Ellingsen) |
| ID Code: | 102555 |
| Year Published: | 2015 |
| Deposited By: | Mathematics and Physics |
| Deposited On: | 2015-08-28 |
| Last Modified: | 2017-11-03 |
| Downloads: | 311 View Download Statistics |
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