University Of Tasmania
113914 final.pdf (1.66 MB)

Parallaxes of 6.7-GHz methanol masers towards the G 305.2 high-mass star formation region

Download (1.66 MB)
journal contribution
posted on 2023-05-19, 01:11 authored by Krishnan, V, Simon EllingsenSimon Ellingsen, Reid, MJ, Bignall, HE, Jamie McCallumJamie McCallum, Phillips, CJ, Reynolds, C, Stevens, J
We have made measurements to determine the parallax and proper motion of the three 6.7-GHz methanol masers G 305.200+0.019, G 305.202+0.208 and G 305.208+0.206. The combined parallax is found to be 0.25±0.05 mas, corresponding to a distance of 4.1^{+1.2}_{-0.7} kpc. This places the G 305.2 star formation region in the Carina-Sagittarius spiral arm. The inclusion of G 305.2 increases the Galactic azimuth range of the sources in this arm by 40° from Sato et al., allowing us to determine the pitch angle of this spiral with greater confidence to be ψ = 19.0° ± 2.6°. The first very long baseline interferometry spot maps of the 6.7-GHz methanol masers towards these sources show that they have simple linear and ring-like structures, consistent with emission expected from class II methanol masers in general.


Publication title

Monthly Notices of the Royal Astronomical Society








School of Natural Sciences


Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Copyright 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Repository Status

  • Open

Socio-economic Objectives

Expanding knowledge in the physical sciences

Usage metrics

    University Of Tasmania