Nitric oxide and other molecules

molecular modeling and low-frequency exploration using the Murchison Widefield Array

C. D. Tremblay*, M. D. Gray, N. Hurley-Walker, J. A. Green, J. R. Dawson, J. M. Dickey, P. A. Jones, S. J. Tingay, O. I. Wong

*Corresponding author for this work

Research output: Contribution to journalArticle


We present new molecular modeling for 14NO and 15NO and a deep, blind molecular line survey at low radio frequencies (99-129 MHz). This survey is the third in a series completed with the Murchison Widefield Array (MWA), but in comparison with the previous surveys, uses 4 times more data (17 hr versus 4 hr) and is 3 times better in angular resolution (1′ versus 3′). The new molecular modeling for nitric oxide and its main isotopologue has seven transitions within the MWA frequency band (although we also present the higher-frequency transitions). Although we did not detect any new molecular lines at a limit of 0.21 Jy beam-1, this work is an important step in understanding the data processing challenges for the future Square Kilometre Array and places solid limits on what is expected in the future of low-frequency surveys. The modeling can be utilized for future searches of nitric oxide.

Original languageEnglish
Article number65
Pages (from-to)1-8
Number of pages8
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 10 Dec 2020

Bibliographical note

Copyright 2020 The American Astronomical Society. First published in the Astrophysical Journal, 905(1), 65, 2020, published by IOP Publishing. The original publication is available at Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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