University of Tasmania

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Nitric oxide and other molecules: molecular modeling and low-frequency exploration using the Murchison Widefield Array

journal contribution
posted on 2023-05-21, 12:52 authored by Tremblay, CD, Gray, MD, Hurley-Walker, N, Green, JA, Joanne Dawson, John DickeyJohn Dickey, Jones, PA, Tingay, SJ, Wong, OI
We present new molecular modeling for (NO)-N-14 and (NO)-N-15 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.


Publication title

Astrophysical Journal








School of Natural Sciences


Institute of Physics Publishing, Inc

Place of publication

United States

Repository Status

  • Restricted

Socio-economic Objectives

Other information and communication services not elsewhere classified; Expanding knowledge in the physical sciences