A First Look for Molecules between 103 and 133 MHz using the Murchison Widefield Array

Abstract

We detail and present results from a pilot study to assess the feasibility of detecting molecular lines at low radio frequencies. We observed a 400 square degree region centred on the Galactic Centre with the Murchison Widefield Array (MWA) between 103 and 133\,MHz targeting 28 known molecular species that have significant transitions. The results of this survey yield tentative detections of nitric oxide (NO) and the mercapto radical (SH). Both of these molecules appear to be associated with evolved stars.

arXiv commentAccepted MNRAS, 13 pages, 6 figures, 3 Tables

References in corpus (42)

• LOFAR: The LOw-Frequency ARray
• The SIMBAD astronomical database
• The Milky Way in Molecular Clouds: A New Complete CO Survey
• The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
• The Expanded Very Large Array -- a New Telescope for New Science
• How to Calculate Molecular Column Density
• The Murchison Widefield Array: Design Overview
• A morphological algorithm for improving radio-frequency interference detection
• Science with the Murchison Widefield Array
• Discovery of the Interstellar Chiral Molecule Propylene Oxide (CH${}_3$CHCH${}_2$O)
• Post-correlation radio frequency interference classification methods
• Compact continuum source-finding for next generation radio surveys
• An Improved Model of Diffuse Galactic Radio Emission from 10 MHz to 5 THz
• The H_2O southern Galactic Plane Survey (HOPS): I. Techniques and H_2O maser data
• Spectral imaging of the Central Molecular Zone in multiple 3-mm molecular lines
• MALT90: The Millimetre Astronomy Legacy Team 90 GHz Survey
• Astrochemistry of dust, ice and gas: introduction and overview
• The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation
• Comparative study of CH+ and SH+ absorption lines observed towards distant star-forming regions
• A retrospective view of Miriad
• A Search for Propylene Oxide and Glycine in Sagittarius B2 (LMH) and Orion
• The ATCA/VLA OH 1612 MHz survey. III. Northern Galactic Plane
• Discovery of interstellar mercapto radicals (SH) with the GREAT instrument on SOFIA
• Parametrising Epoch of Reionization foregrounds: A deep survey of low-frequency point-source spectra with the MWA
• The Murchison Widefield Array Commissioning Survey: A Low-Frequency Catalogue of 14,110 Compact Radio Sources over 6,100 Square Degrees
• Sulphur molecules in the circumstellar envelopes of M-type AGB stars
• Searching for Trans Ethyl Methyl Ether in Orion KL
• Spectral imaging of the Central Molecular Zone in multiple 7-mm molecular lines
• Identification of SH $\Delta v=1$ ro-vibrational lines in R And
• Search for Interstellar monohydric Thiols
• SPLASH: The Southern Parkes Large-Area Survey in Hydroxyl - First Science from the Pilot Region
• Herschel HIFI observations of O${}_2$ toward Orion: special conditions for shock enhanced emission
• The line-of-sight distribution of water in the SgrB2 complex
• MALT-45: A 7 mm survey of the southern Galaxy - I. Techniques and spectral line data
• A Digital-Receiver for the Murchison Widefield Array
• A Large Scale, Low Frequency Murchison Widefield Array Survey of Galactic HII regions between 260< l <\340
• Discovery of weak 6.7-GHz CH3OH masers in a sample of high-mass Hi-GAL sources
• Star Formation Sites toward the Galactic Center Region: The Correlation of CH3OH Masers, H2O Masers, and Near-IR Green Sources
• Next Generation Very Large Array Memo No. 6, Science Working Group 1: The Cradle of Life
• Herschel-HIFI observations of H2O, NH3 and N2H+ toward high-mass starless and proto-stellar clumps identified by the Hi-GAL survey

Cited by in corpus (9)

• The Phase II Murchison Widefield Array: Design Overview
• Science with the Murchison Widefield Array: Phase I Results and Phase II Opportunities
• A search for Extraterrestrial Intelligence (SETI) toward the Galactic Anticenter with the Murchison Widefield Array
• A SETI Survey of the Vela Region using the Murchison Widefield Array: Orders of Magnitude Expansion in Search Space
• A Molecular Line Survey around Orion at Low Frequencies with the MWA
• Spectroscopy with the Engineering Development Array: cold H${}^{+}$ at 63 MHz towards the Galactic Centre
• FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies
• Low-Frequency Carbon Recombination Lines in the Orion Molecular Cloud Complex
• First Search for Low-Frequency CH with a Square Kilometre Array Precursor Telescope