Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Infall and outflow motions towards a sample of massive star-forming regions from the RMS survey

Cunningham, N, Lumsden, SL, Moore, TJT, Maud, LT and Mendigutía, I (2018) Infall and outflow motions towards a sample of massive star-forming regions from the RMS survey. Monthly Notices of the Royal Astronomical Society, 477 (2). pp. 2455-2469. ISSN 0035-8711

[img]
Preview
Text
Infall and outflow motions towards a sample of massive star-forming regions from the RMS survey.pdf - Published Version

Download (901kB) | Preview

Abstract

We present the results of an outflow and infall survey towards a distance-limited sample of 31 massive st ar-forming regions drawn from the Red MSX source (RMS) survey. The presence of young, active outflows is identified from SiO (8-7) emission and the infall dynamics are explored using HCO + /H 13 CO + (4-3) emission. We investigate if the infall and outflow parameters vary with source properties, exploring whether regions hosting potentially young active outflows show similarities or differences with regions harbouring more evolved, possibly momentum-driven, 'fossil' outflows. SiO emission is detected towards approximately 46 per cent of the sources. When considering sources with and without an SiO detection (i.e. potentially active and fossil outflows, respectively), only the 12 CO outflow velocity shows a significant difference between samples, indicating SiO is more prevalent towards sources with higher outflow velocities. Furthermore, we find the SiO luminosity increases as a function of the Herschel 70 μm to WISE 22 μm flux ratio, suggesting the production of SiO is prevalent in younger, more embedded regions. Similarly, we find tentative evidence that sources with an SiO detection have a smaller bolometric luminosity-to-mass ratio, indicating SiO (8-7) emission is associated with potentially younger regions. We do not find a prevalence towards sources displaying signatures of infall in our sample. However, the higher energy HCO + transitions may not be the best suited tracer of infall at this spatial resolution in these regions. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Date Deposited: 11 Jun 2018 09:36
Last Modified: 11 Jun 2018 09:36
DOI or Identification number: 10.1093/mnras/sty701
URI: http://researchonline.ljmu.ac.uk/id/eprint/8816

Actions (login required)

View Item View Item