Photometric variability in FU Ori and Z CMa as observed by MOST

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dc.creator Siwak, Michal
dc.creator Rucinski, Slavek M.
dc.creator Matthews, Jaymie M.
dc.creator Kuschnig, Rainer
dc.creator Guenther, David B.
dc.creator Moffat, Anthony F. J.
dc.creator Rowe, Jason F.
dc.creator Sasselov, Dimitar
dc.creator Weiss, Werner W.
dc.date.accessioned 2018-03-05T14:20:10Z
dc.date.available 2018-03-05T14:20:10Z
dc.date.issued 2013-06
dc.identifier.issn 0035-8711
dc.identifier.uri http://library2.smu.ca/handle/01/27340
dc.description Publisher's Version/PDF
dc.description.abstract <p>Photometric observations obtained by the <em>MOST</em> satellite were used to characterize optical small-scale variability of the young stars FU Ori and Z CMa. Wavelet analysis for FU Ori reveals the possible existence of several 2&ndash;9 d quasi-periodic features occurring nearly simultaneously; they may be interpreted as plasma parcels or other localized disc heterogeneities revolving at different Keplerian radii in the accretion disc. Their periods may shorten slowly which may be due to spiralling in of individual parcels towards the inner disc radius, estimated at 4.8 &plusmn; 0.2 R<sub>☉</sub>. Analysis of additional multicolour data confirms the previously obtained relation between variations in the B &minus; V colour index and the V magnitude. In contrast to the FU Ori results, the oscillation spectrum of Z CMa does not reveal any periodicities with the wavelet spectrum possibly dominated by outburst of the Herbig Be component.</p>
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dc.description.provenance Made available in DSpace on 2018-03-05T14:20:10Z (GMT). No. of bitstreams: 1 Guenther_David_B_article_2013_c.pdf: 1188153 bytes, checksum: f161afe00330d63aebcbcd532e96bed7 (MD5) Previous issue date: 2013 en
dc.language.iso en en_CA
dc.publisher Oxford University Press en_CA
dc.relation.uri https://dx.doi.org/10.1093/mnras/stt441
dc.rights This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dc.subject.lcsh Astronomical photometry
dc.subject.lcsh Accretion (Astrophysics)
dc.subject.lcsh Stellar oscillations
dc.title Photometric variability in FU Ori and Z CMa as observed by MOST en_CA
dc.type Text en_CA
dcterms.bibliographicCitation Monthly Notices of the Royal Astronomical Society 432(1), 194-199. (2013) en_CA
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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
 
Published Version: https://dx.doi.org/10.1093/mnras/stt441
 
 

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