Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/1505
Full metadata record
DC FieldValueLanguage
dc.contributor.authorSreedhar Rao, S-
dc.date.accessioned2007-05-04T10:43:12Z-
dc.date.available2007-05-04T10:43:12Z-
dc.date.issued1993-
dc.identifier.citationBASI, Vol. 21, pp. 375-376en
dc.identifier.urihttp://hdl.handle.net/2248/1505-
dc.description.abstractThe metallic-line A type stars (Am) on the main sequence are known to be largely the members of binary systems and therefore yield periods. Due to their small equatorial radial velocities, they display sharp spectral lines which facilitate an easy and accuracte measurement of their Doppler displacements as well as line profile studies. Their slow rotation (nu sin i less than 100 km/s) also causes surface abundance anomalies which are often represented by the distinct spectral characteristic Sp (K) less than Sp (H) less than Sp (ml). Such spectra require a third dimension specifying the metallic-line type for classification. Although, Am stars are cooler extensions of Ap stars, they are hitherto known to be exclusive to each other with respect to their magnetic fields and hence in the degree of display of abundance anomalies and associated spectrum variability. Therefore we have obtained well widened spectra of several Am stars with the Meinel spectrograph at the Nasmyth focus of the 1.2m telescope of the Japal-Rangapur Observatory with the aim to study: Spectroscopic orbits (HD 434, HR 3040, HR 903, 37 epsilon Ser and 41 Sex A at 33 A/mm); MK Morphology (28 Am stars and 39 MK standards at 66 A/mm); and Spectrum line variability (41 Sex A at 33 and 66 A/mm).en
dc.format.extent173845 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAstronomical Society of Indiaen
dc.subjectBinary orbitsen
dc.titleSpectroscopic binary orbits and MK morphological studies of some AM starsen
dc.typeArticleen
Appears in Collections:BASI Publications

Files in This Item:
File Description SizeFormat 
Paper_11.pdf169.77 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.