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Solar Implications of [ITAL]Ulysses[/ITAL] Interplanetary Field Measurements
Open accessAbstract
Recent observations by the Ulysses magnetometer team have shown that the strength of the radial interplanetary field component, | B |, is essentially independent of latitude, a result which implies that the heliospheric currents are confined entirely to thin sheets. Using such a current sheet model, we extrapolate the observed photospheric field to 1 AU and compare the predicted magnitude and sign of B r with spacecraft measurements during 1970-1993. Approximate agreement can be obtained if the solar magnetograph measurements in the Fe I λ5250 line are scaled upward by a latitude-dependent factor, similar to that derived by Ulrich from a study of magnetic saturation effects. The correction factor implies sharply peaked polar fields near sunspot minimum, with each polar coronal hole having a mean field strength of 10 G.
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Citations
Cited by
Coronal Mass Ejections and Forbush Decreases
Cane, H. V. (2000) · Space Sciences Series of ISSI · doi:10.1007/978-94-017-1187-6_4 · Cited by 292
Evolution of the Sun's large-scale magnetic field since the Maunder minimum
Solanki, S. K., Schüssler, M., & Fligge, M. (2000) · Nature · doi:10.1038/35044027 · Cited by 269
The Heliospheric Magnetic Field
Owens, M. J., & Forsyth, R. J. (2013) · Living Reviews in Solar Physics · doi:10.12942/lrsp-2013-5 · Cited by 263
Asterospheric Magnetic Fields and Winds of Cool Stars
Schrijver, C. J., DeRosa, M. L., & Title, A. M. (2003) · The Astrophysical Journal · doi:10.1086/374982 · Cited by 44
Metadata
- Authors
- Wang, Y.-M., & Sheeley, Jr.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1995-07-10
- Volume
- 447
- Issue
- 2
- ISSN
- 0004-637X (ISSN-L)
- OpenAlex
- W1518819128
- Cited by
- 182
- References
- 0
- FWCI
- 6.12
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wang, Y.-M., & Sheeley, Jr. (1995). Solar Implications of [ITAL]Ulysses[/ITAL] Interplanetary Field Measurements. The Astrophysical Journal. https://doi.org/10.1086/309578
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