English  |  正體中文  |  简体中文  |  Items with full text/Total items : 54367/62174 (87%)
Visitors : 15086506      Online Users : 132
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTHU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  On the reliability of ring diagram analysis

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/54752

    Title: On the reliability of ring diagram analysis
    Authors: I. González Hernández;J. Patrón;Dean-Yi Chou;the TON Team
    教師: 周定一
    Date: 1998
    Publisher: American Astronomical Society
    Relation: Astrophysical Journal, American Astronomical Society, Volume 501, Issue 1, July 1998, Pages 408-413
    Keywords: solar atmosphere
    solar oscillation
    solar pulsation
    ring diagram analysis
    Abstract: A comparison between the results of applying a ring diagram analysis to two data sets is described in order to check the quality of the two sets and the reliability of the method. The series used have been obtained with two different helioseismological instruments with the same spatial resolution. A section of 30 × 30 deg2 about the disk center has been tracked during 512 minutes over a series of images taken simultaneously by the Taiwan Oscillation Network instrument station at the Observatorio del Teide and the Michelson Doppler Imager on board the Solar and Heliospheric Observatory. Three-dimensional power spectra have been constructed from both series and fitted to get horizontal velocity flows as a function of frequency. Finally, an inversion process has been applied to obtain the depth dependence of the average velocity vector in a depth range of 0-25 Mm below the solar surface. The results show an acceptable correlation between the velocities obtained from the fitting of the spectra of both data sets in spite of the different kinds of noise affecting the two instruments. However, the correlation drops when comparing the velocities obtained after the inversion process based on these results.
    URI: http://aas.org/
    Appears in Collections:[物理系] 期刊論文

    Files in This Item:

    File Description SizeFormat
    2010104010014.pdf920KbAdobe PDF330View/Open


    SFX Query


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback