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High Mass Star Formation: Properties of NH3 clumps in Southern Galactic Plane

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

Shaila Akhter ,
Maria R. Cunningham ,
Lisa Harvey-Smith ,
Mohammad Ali Nawaz ,
Paul A. Jones ,
Cormac Purcell  and
Andrew Walsh
Shaila Akhter
Affiliation:
School of Physics, UNSW Australia, NSW 2052, Australia email: [email protected] CSIRO Astronomy and Space Science, PO Box 76 Epping, NSW 1710, Australia
Maria R. Cunningham
Affiliation:
School of Physics, UNSW Australia, NSW 2052, Australia email: [email protected]
Lisa Harvey-Smith
Affiliation:
CSIRO Astronomy and Space Science, PO Box 76 Epping, NSW 1710, Australia
Mohammad Ali Nawaz
Affiliation:
Research School of Astronomy & Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611, Australia
Paul A. Jones
Affiliation:
School of Physics, UNSW Australia, NSW 2052, Australia email: [email protected]
Cormac Purcell
Affiliation:
Sydney Institute for Astronomy (SiFA), School of Physics, The University of Sydney, NSW 2006, Australia
Andrew Walsh
Affiliation:
Centre for Astronomy, School of Engineering and Physical Sciences, James Cook University, Townsville, QLD 4811, Australia
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Abstract

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Massive stars are some of the most important objects in the Universe, shaping the evolution of galaxies, creating chemical elements, and hence shaping the evolution of the Universe. However, the processes by which they form, and how they shape their environment during their birth processes, are not well understood. We are using NH3 data from the “The H2O Southern Galactic Plane Survey” (HOPS) to define the positions of dense cores/clumps of gas in the southern Galactic plane that are likely to form stars. We did a comparative study with different methods for finding clumps and found Fellwalker to be the best for this dataset. We detected ~ 500 clumps with mean kinetic temperature ~ 20 K and virial mass ~ 680 solar masses.

Keywords

star formationinterstellar mediumHOPSmolecular transitions
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , E2
Copyright
Copyright © International Astronomical Union 2015 

References

Akhter, S., Cunningham, M. R., Harvey-Smith, L., Nawaz, M. A., Jones, P., Purcell, C. R., Longmore, S. N., Walsh, A. J. 2016, MNRAS, in preperationGoogle Scholar
Purcell, C. R., Longmore, S. N., Walsh, A. J., et al. 2012, MNRAS, 426, 1972 Google Scholar