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dc.contributor.authorSkelly, M.B.
dc.contributor.authorUnruh, Y.C.
dc.contributor.authorBarnes, J.R.
dc.contributor.authorLawson, W.A.
dc.contributor.authorDonati, J-F.
dc.contributor.authorCameron, A.C.
dc.date.accessioned2010-04-01T11:05:31Z
dc.date.available2010-04-01T11:05:31Z
dc.date.issued2009
dc.identifier.citationSkelly , M B , Unruh , Y C , Barnes , J R , Lawson , W A , Donati , J-F & Cameron , A C 2009 , ' Doppler images and chromospheric variability of TWA 17 ' , Monthly Notices of the Royal Astronomical Society , vol. 399 , no. 4 , pp. 1829-1838 . https://doi.org/10.1111/j.1365-2966.2009.15411.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 157288
dc.identifier.otherPURE UUID: bbb05cd9-70bc-4411-95b7-50b193f5437b
dc.identifier.otherdspace: 2299/4367
dc.identifier.otherScopus: 70350776690
dc.identifier.urihttp://hdl.handle.net/2299/4367
dc.description‘The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2009.15411.x
dc.description.abstractWe present Doppler imaging and a Balmer line analysis of the weak-line T Tauri star TWA 17. Spectra were taken in 2006 with the University College London Echelle Spectrograph on the Anglo-Australian Telescope. Using least-squares deconvolution to improve the effective signal-to-noise ratio, we produced a Doppler map of the surface spot distribution. This shows similar features to maps of other rapidly rotating T Tauri stars, i.e. a polar spot with more spots extending out of it down to the equator. In addition to the photospheric variability, the chromospheric variability was studied using the Balmer emission. The mean Hα profile has a narrow component consistent with rotational broadening and a broad component extending out to 220 km s−1. The variability in Hα suggests that the chromosphere has at least one slingshot prominence 3R* above the surface.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.titleDoppler images and chromospheric variability of TWA 17en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2009.15411.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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