Multisite spectroscopic seismic study of the β Cep star V2052 Ophiuchi: inhibition of mixing by its magnetic field

  title={Multisite spectroscopic seismic study of the $\beta$ Cep star V2052 Ophiuchi: inhibition of mixing by its magnetic field},
  author={Maryline Briquet and Coralie Neiner and Conny Aerts and Thierry Morel and S. Mathis and Daniel R. Reese and Holger Lehmann and Rafael Costero and J. E. Echevarr{\'i}a and Gerald Handler and Eiji Kambe and Ryuko Hirata and Seiji Masuda and Duncan J. Wright and Stephenson L. S. Yang and Olga I. Pintado and David Mkrtichian and Byeong-Cheol Lee and Inwoo Han and Albert Bruch and Peter De Cat and Katrien Uytterhoeven and Karolien Lefever and J. Vanautgaerden and Bertrand de Batz and Yves Fr{\'e}mat and Huib F. Henrichs and Vincent C. Geers and Christophe Martayan and Anne Marie Hubert and Olivier Thizy and A. H. Tijani},
  journal={Monthly Notices of the Royal Astronomical Society},
We used extensive ground-based multisite and archival spectroscopy to derive observational constraints for a seismic modelling of the magnetic β Cep star V2052 Ophiuchi. The line-profile variability is dominated by a radial mode (f1 = 7.148 46 d−1) and by rotational modulation (Prot = 3.638 833 d). Two non-radial low-amplitude modes (f2 = 7.756 03 d−1 and f3 = 6.823 08 d−1) are also detected. The four periodicities that we found are the same as the ones discovered from a companion multisite… 

Figures and Tables from this paper

Massive pulsating stars observed by BRITE-Constellation - I. The triple system β Centauri (Agena)
This paper aims to precisely determine the masses and detect pulsation modes in the two massive components of Beta Cen with BRITE-Constellation photometry. In addition, seismic models for the
Forward seismic modeling of the pulsating magnetic B-type star HD 43317
The large-scale magnetic fields detected at the surface of about 10% of hot stars extend into the stellar interior, where they may alter the structure. Deep inner regions of stars are only observable
MOBSTER – V. Discovery of a magnetic companion star to the magnetic β Cep pulsator HD 156424
HD 156424 (B2 V) is a little-studied magnetic hot star in the Sco OB4 association, previously noted to display both high-frequency radial velocity (RV) variability and magnetospheric H α emission.
Discovery of a magnetic field in the CoRoT hybrid B-type pulsator HD 43317
Context. A promising way of testing the impact of a magnetic field on internal mixing (core overshooting, internal rotation) in mainsequence B-type stars is to perform asteroseismic studies of a
HD 96446: a long-period binary with a strongly magnetic He-rich primary with β Cephei pulsations
Aims. HD 96446 is a magnetic B2p He-strong star that has been reported to be a β Cep pulsator. We present a detailed spectroscopic analysis of this object based on an intensive observational data set
Discovery of the magnetic field in the pulsating B star β Cephei
Context. Although the star itself is not helium enriched, the periodicity and the variability in the UV wind lines of the pulsating B1 IV star β Cephei are similar to what is observed in magnetic
Magnetic characterization of the SPB/$\mathbf{\beta}$ Cep hybrid pulsator HD 43317
Large-scale magnetic fields at the surface of massive stars do not only influence the outer-most layers of the star, but also have consequences for the deep interior, only observationally accessible
On the first δ Sct–roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars
Abstract Strong magnetic fields in chemically peculiar A-type (Ap) stars typically suppress low-overtone pressure modes (p modes) but allow high-overtone p modes to be driven. KIC 11296437 is the
Magnetic characterization and variability study of the magnetic SPB star o Lupi
Thanks to large dedicated surveys, large-scale magnetic fields have been detected for about 10% of early-type stars. We aim to precisely characterize the large-scale magnetic field of the magnetic
Polarimetric detection of non-radial oscillation modes in the β Cephei star β Crucis
Here we report the detection of polarization variations due to non-radial modes in the β Cephei star β Crucis. In so doing we confirm 40-year-old predictions of pulsation-induced polarization


An asteroseismic study of the β Cephei star 12 Lacertae: multisite spectroscopic observations, mode identification and seismic modelling
We present the results of a spectroscopic multisite campaign for the β Cephei star 12 (DD) Lacertae. Our study is based on more than thousand high-resolution high S/N spectra gathered with eight
An asteroseismic study of the β Cephei star θ Ophiuchi: constraints on global stellar parameters and core overshooting
We present a seismic study of the β Cephei star θ Ophiuchi. Our analysis is based on the observation of one radial mode, one rotationally split � = 1 triplet and three components of a rotationally
A multisite photometric study of two unusual β Cep stars: the magnetic V2052 Oph and the massive rapid rotator V986 Oph
We report a multisite photometric campaign for theCep stars V2052 Oph and V986 Oph. 670 hours of high-quality differential photoelectric Stromgren, Johnson and Geneva time-series photometry were
An asteroseismic study of the β Cephei star β Canis Majoris
Aims. We present the results of a detailed analysis of 452 ground-based, high-resolution high S/N spectroscopic measurements spread over 4.5 years for β Canis Majoris with the aim of determining the
Rotation, pulsations and magnetic field in V 2052 Ophiuchi: A new He-strong star
V 2052 Oph is a β Cep star with v sini ∼ 60 km s −1 . The behavior of its stellar wind was studied in the ultraviolet wavelength region with the IUE satellite. It revealed periodic variations in the
Constraints on opacities from complex asteroseismology of B-type pulsators: the β Cephei star θ Ophiuchi
We present results of a comprehensive asteroseismic modelling of the β Cephei variable θ Ophiuchi. We call these studies complex asteroseismology because our goal is to reproduce both pulsational
Asteroseismology of the beta Cephei star 12(DD)Lacertae
We report a multisite photometric campaign for the Beta Cephei star 12 Lacertae. 750 hours of high-quality differential photoelectric Stromgren, Johnson and Geneva time-series photometry were
Detecting and modelling the magnetic field of the β Cephei star V 2052 Ophiuchi
Aims. Following the indirect detection of a magnetic field in the β Cephei star V 2052 Oph by Neiner and collaborators in 2003 with the Musicos spectropolarimeter, we remeasured the magnetic field of
Asteroseismology of the β Cephei star ν Eridani: massive exploration of standard and non-standard stellar models to fit the oscillation data
We present the results of a detailed seismic modelling of the Cephei star Eridani with the Li‘ ege evolution and pulsation codes. We selected four clearly detected, well-identified and independent
The strong magnetic field of the large-amplitude β Cephei pulsator V1449 Aquilae
Aims. Only for very few β Cephei stars has the behaviour of the magnetic field been studied over the rotation cycle. During the past two years we have obtained multi-epoch polarimetric spectra of the