Maud, L, Lumsden, SL, Moore, TJTM et al. (3 more authors) (2015) A distance-limited sample of massive star-forming cores from the RMS Survey. Monthly Notices of the Royal Astronomical Society, 452 (1). 637 - 655. ISSN 0035-8711
Abstract
We analyse C18O (J = 3-2) data from a sample of 99 infrared (IR)-bright massive young stellar objects (MYSOs) and compact H II regions that were identified as potential molecular-outflow sources in the Red MSX Source survey. We extract a distance-limited (D < 6 kpc) sample shown to be representative of star formation covering the transition between the source types. At the spatial resolution probed, Larson-like relationships are found for these cores, though the alternative explanation, that Larson's relations arise where surface-density-limited samples are considered, is also consistent with our data. There are no significant differences found between source properties for the MYSOs and H II regions, suggesting that the core properties are established prior to the formation of massive stars, which subsequently have little impact at the later evolutionary stages investigated. There is a strong correlation between dust-continuum and C18O-gas masses, supporting the interpretation that both trace the same material in these IR-bright sources. A clear linear relationship is seen between the independently established core masses and luminosities. The position of MYSOs and compact H II regions in the mass-luminosity plane is consistent with the luminosity expected from the most massive protostar in the cluster when using an ˜40 per cent star formation efficiency and indicates that they are at a similar evolutionary stage, near the end of the accretion phase.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Maud, L, Lumsden, SL, Moore, TJTM, Mottram, JC, Urquhart, JS and Cicchini, A (2015) A distance-limited sample of massive star-forming cores from the RMS Survey. Monthly Notices of the Royal Astronomical Society, 452 (1). 637 - 655 is available online at: http://dx.doi.org/10.1093/mnras/stv1334 |
Keywords: | stars: abundances, stars: formation, stars: massive, stars: protostars |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) |
Funding Information: | Funder Grant number PPARC ST/F002092/1 PPARC PP/F001193/1 Science & Technology Facilities Council(STFC) ST/L000628/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Jul 2015 14:18 |
Last Modified: | 27 Feb 2018 05:58 |
Published Version: | http://dx.doi.org/10.1093/mnras/stv1334 |
Status: | Published |
Publisher: | Oxford University Press (OUP): Policy P - Oxford Open Option A |
Identification Number: | 10.1093/mnras/stv1334 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:88094 |