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dc.contributor.authorMairs, Steve
dc.contributor.authorJohnstone, Doug
dc.contributor.authorKirk, Helen
dc.contributor.authorLane, James
dc.contributor.authorBell, Graham S.
dc.contributor.authorGraves, Sarah
dc.contributor.authorHerczeg, Gregory J.
dc.contributor.authorScicluna, Peter
dc.contributor.authorBower, Geoffrey C.
dc.contributor.authorChen, Huei-Ru Vivien
dc.contributor.authorHatchell, Jennifer
dc.contributor.authorAikawa, Yuri
dc.contributor.authorChen, Wen-Ping
dc.contributor.authorKang, Miju
dc.contributor.authorKang, Sung-Ju
dc.contributor.authorLee, Jeong-Eun
dc.contributor.authorMorata, Oscar
dc.contributor.authorPon, Andy
dc.contributor.authorScholz, Aleks
dc.contributor.authorTakahashi, Satoko
dc.contributor.authorYoo, Hyunju
dc.contributor.authorand the JCMT Transient Team
dc.identifier.citationMairs , S , Johnstone , D , Kirk , H , Lane , J , Bell , G S , Graves , S , Herczeg , G J , Scicluna , P , Bower , G C , Chen , H-R V , Hatchell , J , Aikawa , Y , Chen , W-P , Kang , M , Kang , S-J , Lee , J-E , Morata , O , Pon , A , Scholz , A , Takahashi , S , Yoo , H & and the JCMT Transient Team 2017 , ' The JCMT Transient Survey : identifying submillimeter continuum variability over several year timescales using archival JCMT Gould Belt Survey observations ' , Astrophysical Journal , vol. 849 , no. 2 , 107 .
dc.identifier.otherPURE: 251679401
dc.identifier.otherPURE UUID: 0d9fe8e8-6a3b-4fb2-b07f-6500aae63bf0
dc.identifier.otherBibCode: 2017ApJ...849..107M
dc.identifier.otherScopus: 85034604067
dc.identifier.otherWOS: 000414725900003
dc.description.abstractInvestigating variability at the earliest stages of low-mass star formation is fundamental in understanding how a protostar assembles mass. While many simulations of protostellar disks predict non-steady accretion onto protostars, deeper investigation requires robust observational constraints on the frequency and amplitude of variability events characterized across the observable SED. In this study, we develop methods to robustly analyze repeated observations of an area of the sky for submillimeter variability in order to determine constraints on the magnitude and frequency of deeply embedded protostars. We compare 850 μm JCMT Transient Survey data with archival JCMT Gould Belt Survey data to investigate variability over 2–4 year timescales. Out of 175 bright, independent emission sources identified in the overlapping fields, we find seven variable candidates, five of which we classify as Strong, and the remaining two we classify as Extended to indicate that the latter are associated with larger-scale structure. For the Strong variable candidates, we find an average fractional peak brightness change per year of |4.0| % yr-1, with a standard deviation of 2.7 % yr-1. In total, 7% of the protostars associated with 850 μm emission in our sample show signs of variability. Four of the five Strong sources are associated with a known protostar. The remaining source is a good follow-up target for an object that is anticipated to contain an enshrouded, deeply embedded protostar. In addition, we estimate the 850 μm periodicity of the submillimeter variable source, EC 53, to be 567 ± 32 days, based on the archival Gould Belt Survey data.
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2017 American Astronomical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectISM: structureen
dc.subjectStars: formationen
dc.subjectStars: pre-main sequenceen
dc.subjectSubmillimeter: generalen
dc.subjectSubmillimeter: ISMen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleThe JCMT Transient Survey : identifying submillimeter continuum variability over several year timescales using archival JCMT Gould Belt Survey observationsen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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