dc.creator |
Siwak, Michal |
|
dc.creator |
Rucinski, Slavek M. |
|
dc.creator |
Matthews, Jaymie M. |
|
dc.creator |
Pojmanski, Grzegorz |
|
dc.creator |
Kuschnig, Rainer |
|
dc.creator |
Guenther, David B. |
|
dc.creator |
Moffat, Anthony F. J. |
|
dc.creator |
Sasselov, Dimitar |
|
dc.creator |
Weiss, Werner W. |
|
dc.date.accessioned |
2018-06-11T12:38:08Z |
|
dc.date.available |
2018-06-11T12:38:08Z |
|
dc.date.issued |
2011-02 |
|
dc.identifier.issn |
0035-8711 |
|
dc.identifier.uri |
http://library2.smu.ca/handle/01/27546 |
|
dc.description |
Publisher's Version/PDF |
|
dc.description.abstract |
As a continuation of our previous studies in 2007 and 2008, new photometric observations of the T Tauri star TW Hya obtained by the MOST satellite and the All Sky Automated Survey (ASAS) project over 40 d in 2009 with temporal resolution of 0.2 d are presented. A wavelet analysis of the combined MOST–ASAS data provides a rich picture of coherent, intermittent, variable-period oscillations, similarly as discovered in the 2008 data. The periods (1.3–10 d) and systematic period shortening on time-scales of weeks can be interpreted within the model of magnetorotationally controlled accretion processes in the inner accretion disc around the star. Within this model and depending on the assumed visibility of plasma parcels causing the oscillations, the observed shortest oscillation period may indicate the stellar rotation period of 1.3 or 2.6 d, synchronized with the disc at 4.5 or 7.1 R<sub>☉</sub>, respectively. |
en_CA |
dc.description.provenance |
Submitted by Betty McEachern (betty.mceachern@smu.ca) on 2018-06-11T12:38:08Z
No. of bitstreams: 1
Guenther_David_B_article_2011_e.pdf: 948731 bytes, checksum: 643755814a437517b6db2e3888ceac0d (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2018-06-11T12:38:08Z (GMT). No. of bitstreams: 1
Guenther_David_B_article_2011_e.pdf: 948731 bytes, checksum: 643755814a437517b6db2e3888ceac0d (MD5)
Previous issue date: 2011-02 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
Wiley-Blackwell |
en_CA |
dc.relation.uri |
https://dx.doi.org/10.1111/j.1365-2966.2010.17649.x |
|
dc.rights |
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2010 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
|
dc.subject.lcsh |
T Tauri stars |
|
dc.subject.lcsh |
Accretion (Astrophysics) |
|
dc.subject.lcsh |
Stars -- Rotation |
|
dc.title |
Analysis of variability of TW Hya as observed by MOST and ASAS in 2009 |
en_CA |
dc.type |
Text |
en_CA |
dcterms.bibliographicCitation |
Monthly Notices of the Royal Astronomical Society 410(4), 2725-2729. (2011) |
en_CA |