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SuperMALT: Physical and Chemical Properties of Massive and Dense Clumps

Published online by Cambridge University Press:  04 September 2018

Sudeep Neupane ,
Guido Garay ,
Yanett Contreras  and
SuperMALT Team
Sudeep Neupane
Affiliation:
Department of Astronomy, Universidad de Chile, Casilla 36D, Santiago, Chile Email: [email protected]
Guido Garay
Affiliation:
Department of Astronomy, Universidad de Chile, Casilla 36D, Santiago, Chile Email: [email protected]
Yanett Contreras
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden
SuperMALT Team
Affiliation:
http://home.strw.leidenuniv.nl/~ycontreras/supermalt.html
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Abstract

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The SuperMALT survey is observing 76 MALT90 clumps at different evolutionary stages (from pre-stellar or quiescent to HII) in high excitation molecular lines and key isotopomers using the Apex 12m telescope with an angular resolution of ∼20” and a velocity resolution of ∼0.1 km/s. The aim of this survey is to determine the physical, chemical, and kinematical properties of the gas within clumps as they evolve. Here we report some preliminary results based on observations of the J=3-2 & 4-3 lines of HNC, HCN, HCO+, N2H+ and of the J=3-2 line of the isotopologue H13CO+. We find that the morphologies and line profiles vary with the evolutionary stage of the clumps. The average line width increases from quiescent to HII clumps while line ratios show hint of chemical differences among the various evolutionary stages.

Keywords

ISM: cloudsISM: moleculesISM: evolutionline: profiles
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S332: Astrochemistry VII: Through the Cosmos from Galaxies to Planets , March 2017 , pp. 254 - 260
Copyright
Copyright © International Astronomical Union 2018 

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