The buddies of Babcock's star - X-ray emission from extreme magnetic ApBp stars?
Abstract
We propose XMM-Newton observations of two extreme magnetic Ap/Bp stars, HD 75049 and HD 137509, that exhibit surface field strengths of about 30 kG. HD 75049 is an Ap star and its extraordinary large magnetic field is dominated by a strong dipole component. The B9p star HD 137509 exhibits a similar surface field strength, but the underlying magnetic structure has a far more complex field geometry. Our targets have magnetic fields that rival famous Babcock's star that was recently established as a bright X-ray source. X-ray emission from intermediate mass stars is thought to originate from magnetically confined wind-shocks and the aim of this proposal is to test, whether HD 75049 and HD 137509 emit X-rays and if so, to determine their basic X-ray properties.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2009
- Bibcode:
- 2009xmm..prop...36R
- Keywords:
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- Stars;
- White Dwarfs;
- Solar System;
- HD 137509;
- HD 75049