Spectroscopic fits to the alma science verification band 6 survey of the orion hot core and compact ridge

Nagarajan, Satyakumar

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https://hdl.handle.net/2142/91360 Copy

Description

Title

Spectroscopic fits to the alma science verification band 6 survey of the orion hot core and compact ridge

Author(s)

Nagarajan, Satyakumar

Contributor(s)

• Remijan, Anthony
• De Lucia, Frank C.
• Neese, Christopher F.
• Burkhardt, Andrew M.
• McMillan, James P.

Issue Date

2016-06-22

Keyword(s)

Astronomy

Abstract

Individual spectral lines in astrophysical data are ordinarily assigned by comparison with line frequency and intensities predicted by catalogs. Here we seek to fit the spectra of specific sources within Orion KL that are first selected by ALMA’s angular resolution and then by Doppler velocity class. For each molecule in this study, astrophysical reference lines are selected. Subsequent analyses of individual velocity components provide the astrophysical column density and temperature for these velocity regimes. These column densities and temperatures are then combined with results from the complete experimental spectra obtained from our laboratory spectra to model the molecule’s contribution to the entire astrophysical spectrum [1]. Effects due to optical thickness and spectral overlap are included in the analyses. Examples for ethyl cyanide in the hot core and methanol in the compact ridge will be presented. [1] J. P. McMillan, S. M. Fortman, C. F. Neese, and F. C. De Lucia, ”The Complete, Temperature Resolved Experi- mental Spectrum of Methanol (CH3OH) between 214.6 and 265.4 GHz,” Astrophys. J., vol. 795, pp. 56(1-9), 2014.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

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http://hdl.handle.net/2142/91360

Copyright and License Information

Copyright 2016 by the authors

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