Obonyo, WO, Lumsden, SL orcid.org/0000-0001-5748-5166, Hoare, MG et al. (3 more authors) (2019) A search for non-thermal radio emission from jets of massive young stellar objects. Monthly Notices of the Royal Astronomical Society, 486 (3). pp. 3664-3684. ISSN 0035-8711
Abstract
Massive young stellar objects (MYSOs) have recently been shown to drive jets whose particles can interact with either the magnetic fields of the jet or ambient medium to emit non-thermal radiation. We report a search for non-thermal radio emission from a sample of 15 MYSOs to establish the prevalence of the emission in the objects. We used their spectra across the L, C, and Q bands along with spectral index maps to characterize their emission. We find that about 50 per cent of the sources show evidence for non-thermal emission with 40 per cent showing clear non-thermal lobes, especially sources of higher bolometric luminosity. The common or IRAS names of the sources that manifest non-thermal lobes are V645Cyg, IRAS 22134+5834, NGC 7538 IRS 9, IRAS 23262 + 640, AFGL 402d, and AFGL 490. All the central cores of the sources are thermal with corresponding mass-loss rates that lie in the range of ∼3 × 10−7 to 7×10−6M⊙yr−1. Given the presence of non-thermal lobes in some of the sources and the evidence of non-thermal emission from some spectral index maps, it seems that magnetic fields play a significant role in the jets of massive protostars. Also noted is that some of the sources show evidence of binarity and variability.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019, The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. All rights reserved. |
Keywords: | stars: formation – stars: massive – stars: mass-loss – 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) > Astrophysics (Leeds) |
Funding Information: | Funder Grant number Science & Technology Facilities Council (STFC) ST/L000628/1 Science & Technology Facilities Council (STFC) ST/P005535/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Jun 2019 15:08 |
Last Modified: | 21 Jun 2019 15:08 |
Published Version: | https://academic.oup.com/mnras/article/486/3/3664/... |
Status: | Published |
Publisher: | Oxford University Press |
Identification Number: | 10.1093/mnras/stz1091 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:147635 |