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Remarkable non-dipolar magnetic field of the Bp star HD 137509
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics, Observational Astronomy.
2006 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 454, no 1, 321-325 p.Article in journal (Refereed) Published
Abstract [en]

The southern magnetic Bp star HD137509 exhibits complex rotational modulation of the longitudinal field and other magnetic observables. Interpretation of this magnetic variability in the framework of the low-order multipolar field models suggests a very strong quadrupolar component to dominate the surface field topology of HD137509. I have examined the high-quality VLT/UVES spectra of HD137509 and discovered resolved Zeeman split components in some of the spectral lines. The inferred mean surface field modulus, < B > = 29 kG, agrees with the multipolar model predictions. This confirms the presence of an extremely strong non-dipolar magnetic field in HD137509 and establishes this star as the object with the second-largest field among magnetic chemically peculiar stars.

Place, publisher, year, edition, pages
2006. Vol. 454, no 1, 321-325 p.
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-21525DOI: 10.1051/0004-6361:20064932ISI: 000238726300038OAI: oai:DiVA.org:uu-21525DiVA: diva2:49298
Available from: 2006-12-29 Created: 2006-12-29 Last updated: 2016-10-13Bibliographically approved

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Kochukhov, Oleg
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