Show simple item record

dc.contributor.authorBarnes, J R
dc.contributor.authorJames, D J
dc.contributor.authorCameron, A C
dc.date.accessioned2011-12-14T17:01:03Z
dc.date.available2011-12-14T17:01:03Z
dc.date.issued2004-08-01
dc.identifier.citationBarnes , J R , James , D J & Cameron , A C 2004 , ' Differential rotation and star-spot evolution on HK Aqr in 2001 and 2002 ' , Monthly Notices of the Royal Astronomical Society , vol. 352 , no. 2 , pp. 589-599 . https://doi.org/10.1111/j.1365-2966.2004.07949.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 495854
dc.identifier.otherPURE UUID: 9e51ae9f-6cef-4242-9be9-4d2e868f03c1
dc.identifier.otherWOS: 000222822500023
dc.identifier.otherScopus: 3543005967
dc.identifier.urihttp://hdl.handle.net/2299/7283
dc.description.abstractWe present images of the rapidly rotating (P-rot = 0.431 d) M1.5Ve dwarf HK Aqr, from data obtained during 2001 and 2002. Star-spots are found distributed at a range of latitudes during both observing seasons, but unlike other solar-type rapid rotators of higher mass, HK Aqr does not show a strong polar cap at either epoch. In addition to the surface brightness images, we make use of the four-night time-base over which the 2002 observations were made, in order to derive an estimate of the latitudinal dependent rotation on HK Aqr. We find that the equator-lap-pole time lies in the range -1449 to +448 d. Although very small, we are therefore unable to determine whether the degree of differential rotation is in the solar or anti-solar sense.en
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectline : profiles
dc.subjectmethods : data analysis
dc.subjecttechniques : miscellaneous
dc.subjectstars : activity
dc.subjectstars : individual : HK Aqr (Gl 890)
dc.subjectstars : late-type
dc.subjectDUAL-SITE OBSERVATIONS
dc.subjectDOPPLER IMAGES
dc.subjectMERIDIONAL FLOW
dc.subjectG DWARFS
dc.subjectPATTERNS
dc.subjectPROMINENCES
dc.subjectGLIESE-890
dc.subjectSUN
dc.titleDifferential rotation and star-spot evolution on HK Aqr in 2001 and 2002en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2004-08-01
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2004.07949.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record