dc.contributor.author | Barnes, J R | |
dc.date.accessioned | 2011-12-14T17:01:06Z | |
dc.date.available | 2011-12-14T17:01:06Z | |
dc.date.issued | 2004-03-11 | |
dc.identifier.citation | Barnes , 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.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/2299/7285 | |
dc.description.abstract | We 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.extent | 6 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | line : profiles | |
dc.subject | methods : observational | |
dc.subject | techniques : spectroscopic | |
dc.subject | stars : imaging | |
dc.subject | stars : spots | |
dc.subject | LINE BROADENING FUNCTIONS | |
dc.subject | DIFFERENTIAL ROTATION | |
dc.subject | BINARIES | |
dc.subject | DWARFS | |
dc.subject | STARS | |
dc.subject | UMA | |
dc.title | Deconvolution of high-resolution spectra as a signal-to-noise ratio enhancement method | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1111/j.1365-2966.2004.07451.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |