POWER SPECTRUM ANALYSIS OF MOUNT WILSON SOLAR DIAMETER MEASUREMENTS: EVIDENCE FOR SOLAR INTERNAL r-MODE OSCILLATIONS

Journal Article · Fri Dec 10 00:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/725/1/492· OSTI ID:21474402

Sturrock, P A ^[1]; Bertello, L ^[2]

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1. Center for Space Science and Astrophysics, Varian 302, Stanford University, Stanford, CA 94305 (United States)
2. National Solar Observatory, 950 North Cherry Avenue, Tucson, AZ 85719 (United States)

This paper presents a power-spectrum analysis of 39,024 measurements of the solar diameter made at the Mount Wilson Observatory from 1968.670 to 1997.965. This power spectrum contains a number of very strong peaks. We find that eight of these peaks agree closely with the frequencies of r-mode oscillations for a region of the Sun where the sidereal rotation frequency is 12.08 year{sup -1}. We estimate that there is less than one chance in 10{sup 6} of finding this pattern by chance.

• OSTI ID: 21474402
• Journal Information: Astrophysical Journal, Vol. 725, Issue 1; Other Information: DOI: 10.1088/0004-637X/725/1/492; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DATA ANALYSIS
OSCILLATION MODES
PHOTOSPHERE
SPECTRA
SUN
ATMOSPHERES
MAIN SEQUENCE STARS
SOLAR ATMOSPHERE
STARS
STELLAR ATMOSPHERES