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dc.contributor.authorBarnes, J R
dc.date.accessioned2011-12-14T17:01:06Z
dc.date.available2011-12-14T17:01:06Z
dc.date.issued2004-03-11
dc.identifier.citationBarnes , J R 2004 , ' Deconvolution of high-resolution spectra as a signal-to-noise ratio enhancement method ' , Monthly Notices of the Royal Astronomical Society , vol. 348 , no. 4 , pp. 1295-1300 . https://doi.org/10.1111/j.1365-2966.2004.07451.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 496096
dc.identifier.otherPURE UUID: 44e36364-6937-43ae-9fb6-26ed1bf286d4
dc.identifier.otherWOS: 000220088100018
dc.identifier.otherScopus: 1642395552
dc.identifier.urihttp://hdl.handle.net/2299/7285
dc.description.abstractWe demonstrate the use of singular value decomposition as a method for deconvolving high-resolution spectra of rapidly rotating stars. A convolution matrix can be built from the observed template spectrum of a slowly rotating star, with the same spectral type as the target. This can then be written in terms of a set of orthogonal basis vectors which can easily be inverted. The deconvolved stellar rotation profile or broadening function is thus similarly represented as a linear combination of basis vectors. By including only the required number of vectors and rejecting higher- order terms which only describe noise, we obtain a broadening function with greatly boosted signal- to- noise ratio as compared with a mean line in the target spectrum. The high signal- to- noise ratios allow localized line distortions due to starspots to be resolved. We describe the technique and demonstrate its application to the data sets of a rapidly rotating K3 and M1 dwarf.en
dc.format.extent6
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectline : profiles
dc.subjectmethods : observational
dc.subjecttechniques : spectroscopic
dc.subjectstars : imaging
dc.subjectstars : spots
dc.subjectLINE BROADENING FUNCTIONS
dc.subjectDIFFERENTIAL ROTATION
dc.subjectBINARIES
dc.subjectDWARFS
dc.subjectSTARS
dc.subjectUMA
dc.titleDeconvolution of high-resolution spectra as a signal-to-noise ratio enhancement methoden
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2004.07451.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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