The Mopra Southern Galactic Plane CO Survey - Data Release 3

Abstract

We present observations of fifty square degrees of the Mopra carbon monoxide (CO) survey of the Southern Galactic Plane, covering Galactic longitudes $l=300$-$350^{\circ }$ and latitudes $|b|\le 0.5^{\circ }$. These data have been taken at 0.6 arcminute spatial resolution and 0.1 km/s spectral resolution, providing an unprecedented view of the molecular clouds and gas of the Southern Galactic Plane in the 109-115 GHz $J=1$-0 transitions of ${}^{12}$CO, ${}^{13}$CO, C${}^{18}$O and C${}^{17}$O. We present a series of velocity-integrated maps, spectra and position-velocity plots that illustrate Galactic arm structures and trace masses on the order of $\sim$10${}^6$ M${}_{\odot }$ per square degree; and include a preliminary catalogue of C${}^{18}$O clumps located between $l=330$-$340^{\circ }$. Together with information about the noise statistics of the survey these data can be retrieved from the Mopra CO website, the PASA data store and the Harvard Dataverse (doi:10.7910/DVN/LH3BDN ).

53 pages, 40 figures; full data set available via http://newt.phys.unsw.edu.au/mopraco/ ; https://data-portal.hpc.swin.edu.au/dataset/the-mopra-southern-galactic-plane-co-survey-data-release-3 ; or https://doi.org/10.7910/DVN/LH3BDN

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