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Measurements of solar irradiance and effective temperature as a probe of solar interior magnetic fields
Li, LH; Sofia, S
2001-03-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume549Issue:2Pages:1204-1211
AbstractWe argue that a variety of solar data suggest that the activity-cycle timescale variability of the total irradiance is produced by structural adjustments of the solar interior. Assuming these adjustments are induced by variations of internal magnetic fields, we use measurements of the total irradiance and effective temperature over the period from 1978 to 1992 to infer the magnitude and location of the magnetic field. Using an updated stellar evolution model, which includes magnetic fields, we find that the observations can be explained by fields with peak values ranging from 120 to 2.3 kG, located in the convection zone between 0.959 and 0.997 R., respectively. The corresponding maximal radius changes are 17 km when the magnetic field is located at 0.959 R. and 3 km when it is located at 0.997 R.. At these depths, the W-parameter (defined by Delta lnR/Delta lnL, where R and L are the radius and luminosity) ranges from 0.02 to 0.006. All these predictions are consistent with helioseismology and recent measurements carried out by the Michelson Doppler Imager experiment on the Solar and Heliospheric Observatory.
KeywordSun : Interior Sun : Magnetic Fields
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordEMERGING FLUX TUBES ; CONVECTION ZONE ; CYCLE ; SUN ; LUMINOSITY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000167605200044
Citation statistics
Cited Times:27[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8207
Collection期刊(老文献)
Affiliation1.Yale Univ, Dept Astron, New Haven, CT 06520 USA
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, LH,Sofia, S. Measurements of solar irradiance and effective temperature as a probe of solar interior magnetic fields[J]. ASTROPHYSICAL JOURNAL,2001,549(2):1204-1211.
APA Li, LH,&Sofia, S.(2001).Measurements of solar irradiance and effective temperature as a probe of solar interior magnetic fields.ASTROPHYSICAL JOURNAL,549(2),1204-1211.
MLA Li, LH,et al."Measurements of solar irradiance and effective temperature as a probe of solar interior magnetic fields".ASTROPHYSICAL JOURNAL 549.2(2001):1204-1211.
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