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SiO maser emission as a stellar line-of-sight velocity tracer in the Bulge Asymmetries and Dynamical Evolution (BAaDE) survey

Published online by Cambridge University Press:  14 May 2020

Michael C. Stroh Open the ORCID record for Michael C. Stroh [Opens in a new window] ,
Ylva M. Pihlström ,
Loránt O. Sjouwerman Open the ORCID record for Loránt O. Sjouwerman [Opens in a new window] ,
Megan O. Lewis Open the ORCID record for Megan O. Lewis [Opens in a new window] ,
Mark J Claussen ,
Mark R. Morris ,
R. Michael Rich Open the ORCID record for R. Michael Rich [Opens in a new window]  and
the BAaDE collaboration
Michael C. Stroh*
Affiliation:
Department of Physics and Astronomy, University of New Mexico, 1919 Lomas Blvd NE, Albuquerque, NMUSA
Ylva M. Pihlström
Affiliation:
Department of Physics and Astronomy, University of New Mexico, 1919 Lomas Blvd NE, Albuquerque, NMUSA
Loránt O. Sjouwerman
Affiliation:
National Radio Astronomy Observatory, SocorroNM, USA
Megan O. Lewis
Affiliation:
Department of Physics and Astronomy, University of New Mexico, 1919 Lomas Blvd NE, Albuquerque, NMUSA
Mark J Claussen
Affiliation:
National Radio Astronomy Observatory, SocorroNM, USA
Mark R. Morris
Affiliation:
University of California, Los AngelesCA, USA
R. Michael Rich
Affiliation:
University of California, Los AngelesCA, USA
*
† Michael C. Stroh is now at the Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) at Northwestern University. Email: michael.stroh@northwestern.edu.
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Abstract

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The Bulge Asymmetries and Dynamical Evolution (BAaDE) survey aims to explore the complex structure of the inner Galaxy and Galactic Bulge, by using the 43 GHz receivers at the Karl G. Jansky Very Large Array (VLA) and the 86 GHz receivers at the Atacama Large Millimeter/submillimeter Array (ALMA) to observe SiO maser lines in red giant stars. The goal is to construct a sample of stellar point-mass probes that can be used to test models of the gravitational potential, and the final sample is expected to provide at least 20,000 line-of-sight velocities and positions. A possible bias between the VLA and the ALMA SiO maser lines is explored, and the 86 GHz SiO line-peak velocities agree using either of the four sampled lines. Additionally, the SiO maser velocities agree with the OH maser derived velocities.

Keywords

maserssurveysstars: AGB and post-AGBGalaxy: bulgeGalaxy: evolutionGalaxy: kinematics and dynamicsinfrared: stars
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 47 - 48
Copyright
© International Astronomical Union 2020

References

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