Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/1767
Full metadata record
DC FieldValueLanguage
dc.contributor.authorKariyappa, R-
dc.contributor.authorDame, L-
dc.contributor.authorHiremath, K. M-
dc.date.accessioned2007-08-13T11:06:53Z-
dc.date.available2007-08-13T11:06:53Z-
dc.date.issued2006-09-
dc.identifier.citationJournal of Astrophysics and Astronomy, Vol. 27, No. 2-3, pp. 327-331en
dc.identifier.urihttp://hdl.handle.net/2248/1767-
dc.description.abstractWe have used a high spatial and temporal resolution of long time sequence of spectra in CaII H-line obtained at the Vacuum Tower Telescope (VTT) of the Sacramento Peak Observatory on a quiet region at the center of the solar disk over a large number of bright points and network elements to search for atmospheric (chromospheric) g-mode oscillations. An important parameter of the H-line profile, intensity at H2V(IH2V), has been derived from a large number of line profiles. We derived the light curves of all the bright points and network elements. The light curves represent the main pulse with large intensity amplitude and followed by several follower pulses with lower intensity amplitudes. The light curves of these bright points would give an impression that one can as well draw curves towards and away from the highest peak (main pulse) showing an exponential growth and decay of the amplitudes. An exponential decaying function has been fitted for all the light curves of the bright points to determine the damping time of the modes that are more or less the same, and one value of the coefficient of exponent can represent reasonably well the decay for all the cases. The FFT analysis of temporal variation of both the bright points and the network elements indicates around 10-min periodicity. We speculate that this longer period of oscillation may be related to chromospheric g-mode oscillationsen
dc.format.extent130383 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherIndian Academy of Sciencesen
dc.relation.urihttp://www.ias.ac.in/jaa/junsep2006/absjunsep2006.html#jaa30-
dc.subjectSolar chromosphereen
dc.subjectCaII H-lineen
dc.subjectoscillations chromospheric g-modeen
dc.titleObservational Searches for Chromospheric g-Mode Oscillationsfrom CaII H-Line Observationsen
dc.typeArticleen
Appears in Collections:IIAP Publications

Files in This Item:
File Description SizeFormat 
Hiremath_2.pdf127.33 kBAdobe PDFThumbnail
View/Open


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