The Search for Large Scale Coherent Stellar Magnetic Fields
April 7, 3:15pm - 4:45pm
Mānoa Campus, Watanabe 112
Dr. Mark Slovak (UHM Physics):
The Search for Large Scale Coherent Stellar Magnetic Fields
The quantum mechanical derivation of the strong-field Zeeman effect
(splitting of spectral lines of atoms in an external magnetic field) is
briefly reviewed and illustrated by the mercury (Hg) 435.80 nm sigma Zeeman
quartet. An overview of stellar magnetism in the Hertzsprung-Russell (H-R)
diagram is presented, illustrated by solar magnetism as the only extant
example of spatially resolved, time dependent stellar magnetic field
mapping. Magnetic observations of bright post main sequence giant stars
(symbiotic and VV Cephei variables) using a multichannel photoelectric
Zeeman analyzer at the coude focus of the McDonald Observatory 2.7 m
telescope illustrate the difficulty of high precision stellar magnetic field
determinations (+/- 100 Gauss) and contradict earlier photographic
determinations claiming large fields.
Event Sponsor
Physics and Astronomy, Mānoa Campus
More Information
(808) 956-7690
Thursday, April 7
|
|
|
|
8:45am |
41st Annual Albert L. Tester Memorial Symposium Mānoa Campus, Campus Center Ballroom
|
|
12:00pm |
Digital Image Use 101: Finding and Using Images from the Internet Mānoa Campus, Kuykendall 106
|
|
12:00pm |
Psychology Final Oral Mānoa Campus, Sakamaki C-204B
|
|
3:00pm |
Dept. of Oceanography Seminar Mānoa Campus, Marine Sciences Building, MSB 100
|
|
3:00pm |
PBRC Seminar Mānoa Campus, Agricultural Sciences 219
|
|
3:15pm |
The Search for Large Scale Coherent Stellar Magnetic Fields Mānoa Campus, Watanabe 112
|
|
4:00pm |
Shidler College of Business Distinguished Seminar Series Mānoa Campus, School of Architecture Auditorium
|
|
7:00pm |
UH Concert Band @ Ward Warehouse Amphitheater Stage Ward Warehouse Amphitheater Stage
|
|
7:30pm |
Yinong Li, piano (certificate student recital) Mānoa Campus, Orvis Auditorium
|
|
|
