First magnetic field models for recently discovered magnetic beta Cephei and slowly pulsating B stars

Abstract

In spite of recent detections of magnetic fields in a number of beta Cephei and slowly pulsating B (SPB) stars, their impact on stellar rotation, pulsations, and element diffusion is not sufficiently studied yet. The reason for this is the lack of knowledge of rotation periods, the magnetic field strength distribution and temporal variability, and the field geometry. New longitudinal field measurements of four beta Cephei and candidate beta Cephei stars, and two SPB stars were acquired with FORS2 at the VLT. These measurements allowed us to carry out a search for rotation periods and to constrain the magnetic field geometry for four stars in our sample.

11 pages, 1 figure, 4 tables, letter to ApJ

References in corpus (13)

• Catalog of Galactic Beta Cephei Stars
• Discovery of magnetic fields in the beta Cephei star xi^1 CMa and in several Slowly Pulsating B stars
• Nitrogen enrichment, boron depletion and magnetic fields in slowly-rotating B-type dwarfs
• Measurements of magnetic fields over the pulsation cycle in six roAp stars with FORS1 at the VLT
• New measurements of magnetic fields of roAp stars with FORS1 at the VLT
• Spectroscopic determination of the fundamental parameters of 66 B-type stars in the field-of-view of the CoRoT satellite
• New magnetic field measurements of beta Cephei stars and Slowly Pulsating B stars
• The applications of the MHD Alfven wave oscillation model for kHz quasi-periodic oscillations
• Evolution of Magnetic Fields in Stars Across the Upper Main Sequence: II. Observed distribution of the magnetic field geometry
• Asteroseismology and Oblique Pulsator Model of Beta Cephei
• Probing the internal magnetic field of slowly pulsating B-stars through g modes
• On the co-existence of chemically peculiar Bp stars, slowly pulsating B stars and constant B stars in the same part of the H-R diagram
• Photometric studies of three multiperiodic Beta Cephei stars: Beta CMa, 15 CMa and KZ Mus

Cited by in corpus (21)

• Early magnetic B-type stars: X-ray emission and wind properties
• B fields in OB stars (BOB): low-resolution FORS2 spectropolarimetry of the first sample of 50 massive stars
• Exploring the origin of magnetic fields in massive stars: A survey of O-type stars in clusters and in the field
• Exploring the origin of magnetic fields in massive stars: II. New magnetic field measurements in cluster and field stars
• Detection of magnetic fields in both B-type components of the $\epsilon$ Lupi system: a new constraint on the origin of fossil fields?
• Critical evaluation of magnetic field detections reported for pulsating B-type stars in the light of ESPaDOnS, Narval and reanalyzed FORS1/2 observations
• Discovery of the magnetic field in the pulsating B star beta Cephei
• A new type of X-ray pulsar
• The pulsating magnetosphere of the extremely slowly rotating magnetic $\beta$ Cep star ${\xi }^1$ CMa
• First detection of a magnetic field in the fast rotating runaway Oe star zeta Ophiuchi
• CoRoT high-precision photometry of the B0.5 IV star HD 51756
• The strong magnetic field of the large-amplitude beta Cephei pulsator V1449 Aql
• High-Energy Properties of the Enigmatic Be Star gamma Cassiopeiae
• An Observational Evaluation of Magnetic Confinement in the Winds of BA Supergiants
• Weak magnetic field, solid-envelope rotation, and wave-induced N-enrichment in the SPB star $\zeta$ Cassiopeiae
• Period change and stellar evolution of $\beta$ Cephei stars
• Confirmation of xi^1 CMa's ultra-slow rotation: magnetic polarity reversal and a dramatic change in magnetospheric UV emission lines
• HD 149277: a rare short-period SB2 system with a subsynchronously rotating magnetic He-rich primary
• Magnetic field studies of massive main sequence stars
• The magnetic variability of the $\beta$~Cep star ${\xi }^1$\,CMa
• ${\xi }^1$ CMa: An Extremely Slowly Rotating Magnetic B0.7 IV Star