CSO and CARMA Observations of L1157. I. A Deep Search for Hydroxylamine (NH\(_2\)OH)

A deep search for the potential glycine precursor hydroxylamine (NH\(_2\)OH) using the Caltech Submillimeter Observatory (CSO) at \(\lambda = 1.3\) mm and the Combined Array for Research in Millimeter-wave Astronomy (CARMA) at \(\lambda = 3\) mm is presented toward the molecular outflow L1157, targe...

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Bibliographic Details
Published in:arXiv.org 2015-09
Main Authors: McGuire, Brett A, P Brandon Carroll, Dollhopf, Niklaus M, Crockett, Nathan R, Corby, Joanna F, Loomis, Ryan A, Burkhardt, Andrew, Shingledecker, Christopher, Blake, Geoffrey A, Remijan, Anthony J
Format: Article
Language:English
Subjects:
Astrochemistry
Astronomy
Glycine
Millimeter waves
Outflow
Online Access:Get full text
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Summary:A deep search for the potential glycine precursor hydroxylamine (NH\(_2\)OH) using the Caltech Submillimeter Observatory (CSO) at \(\lambda = 1.3\) mm and the Combined Array for Research in Millimeter-wave Astronomy (CARMA) at \(\lambda = 3\) mm is presented toward the molecular outflow L1157, targeting the B1 and B2 shocked regions. We report non-detections of NH\(_2\)OH in both sources. We a perform non-LTE analysis of CH\(_3\)OH observed in our CSO spectra to derive kinetic temperatures and densities in the shocked regions. Using these parameters, we derive upper limit column densities of NH\(_2\)OH of \(\leq1.4 \times 10^{13}\)~cm\(^{-2}\) and \(\leq1.5 \times 10^{13}\)~cm\(^{-2}\) toward the B1 and B2 shocks, respectively, and upper limit relative abundances of \(N_{NH_2OH}/N_{H_2} \leq1.4 \times 10^{-8}\) and \(\leq1.5 \times 10^{-8}\), respectively.
ISSN:2331-8422
DOI:10.48550/arxiv.1509.03779