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Saturday May 16, 2020
AUTHORS:
Sumit Acharya, Ian Clifford, and Hritik Rawat
FACULTY: Dr. James Dull
DEPARTMENT: Physics
Ap stars, or A-peculiar stars, are chemically peculiar A type stars, and possess strong magnetic fields that are often measurable via the Zeeman Effect. The Zeeman Effect describes the mechanism causing spectral lines to split into two or more lines due to the presence of strong magnetic fields. We collected the spectra of three magnetic Ap stars -- HD 215441, HD 65339, and HD 47103 at Mayhill, New Mexico, from January 30 to February 2 using a 14-in. Celestron SCT telescope with a LHIRES III High-resolution spectrometer. Using observed splitting of the especially-strong Si II absorption lines (6371.359 Ã…) of our program stars, it was possible to calculate each star's magnetic field strength. The measured magnetic field strengths for HD 215441, HD 65339, and HD47103 were 32.2 +/- 4.0 kG, 9.3 +/- 1.5 kG, and 16.2+/- 3.6 kG, respectively.
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