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A distance-limited sample of massive star-forming cores from the RMS* survey

Maud, L.T., Lumsden, S.L., Moore, T., Mottram, J.C., Urquhart, J.S., 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). pp. 637-655. ISSN 0035-8711. (doi:10.1093/mnras/stv1334) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://www.dx.doi.org/10.1093/mnras/stv1334

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 a cluster of protostars 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.

Item Type: Article
DOI/Identification number: 10.1093/mnras/stv1334
Uncontrolled keywords: Stars: abundances, Stars: formation, Stars: massive, Stars: protostars
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 24 Nov 2015 11:55 UTC
Last Modified: 29 May 2019 16:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52186 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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