Asteroseismology of the β Cephei star ν Eridani: interpretation and applications of the oscillation spectrum

  title={Asteroseismology of the $\beta$ Cephei star $\nu$ Eridani: interpretation and applications of the oscillation spectrum},
  author={Alexey A. Pamyatnykh and Gerald Handler and Wojciech A. Dziembowski},
  journal={Monthly Notices of the Royal Astronomical Society},
The oscillation spectrum of v Eri is the richest known for any variable of the β Cephei type. We interpret the spectrum in terms of normal mode excitation and construct seismic models of the star. The frequency data combined with data on mean colours set the upper limit on the extent of overshooting from the convective core. We use data on rotational splitting of two dipole (l = 1) modes (g 1 and p 1 ) to infer properties of the internal rotation rate. Adopting a plausible hypothesis of nearly… Expand

Figures and Tables from this paper

A method for the asteroseismic analysis of β Cephei stars is presented and applied to the star ν Eridani. The method is based on the analysis of rotational splittings and their asymmetries usingExpand
Interpretation of the BRITE oscillation data of the hybrid pulsator ν Eridani: a call for the modification of stellar opacities
The analysis of the BRITE oscillation spectrum of the main sequence early B-type star $\nu$ Eridani is presented. Only models with the modified mean opacity profile can account for the observedExpand
Seismic modelling of the β Cephei star HD 180642 (V1449 Aquilae)
Context. We present modelling of the β Cep star HD 180642 based on its observational properties deduced from CoRoT and ground-based photometry as well as from time-resolved spectroscopy. Aims. WeExpand
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 theExpand
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 independentExpand
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 rotationallyExpand
The two hybrid B-type pulsators: ν Eridani and 12 Lacertae
The rich oscillation spectra determined for the two stars, ν Eridani and 12 Lacertae, present an interesting challenge to stellar modelling. The stars are hybrid objects showing not only a number ofExpand
Pulsation frequency distribution in δ Scuti stars
We study the frequency distributions ofScuti stars observed by the Kepler satel- lite in short-cadence mode. To minimize errors in the estimated stellar parameters, we divided the instability stripExpand
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 pulsationalExpand
Multiperiodicity in the large-amplitude rapidly-rotating beta Cephei star HD 203664
Aims. We made a seismic study of the young massive β Cephei star HD 203664 with the goal of constraining its interior structure. Methods. Our study is based on a time series of 328 new GenevaExpand


The Potential of Asteroseismology for Hot, Subdwarf B Stars: A New Class of Pulsating Stars?
We present key sample results of a systematic survey of the pulsation properties of models of hot B subdwarfs. We use equilibrium structures taken from detailed evolutionary sequences of solarExpand
A Driving Mechanism for the Newly Discovered Class of Pulsating Subdwarf B Stars
We present new calculations that strongly reinforce the idea—originally proposed by Charpinet et al.—that pulsation modes are driven through an opacity bump due to a local enhancement of the ironExpand
Asteroseismology of HD 129929: Core Overshooting and Nonrigid Rotation
High-quality multicolor Geneva photometric data taken over 21 years of the B3Vstar HD 129929 detect six frequencies, among which appear the effects of rotational splitting with a spacing of ∼0.0121 cycles per day, which implies that the star rotates very slowly. Expand
A Driving Mechanism for the Newly Discovered Long-Period Pulsating Subdwarf B Stars
We present the results of a stability survey carried out for a sequence of representative models of subdwarf B stars spanning the range of effective temperature 22; 000 KTeff � 38; 000 K. We showExpand
Opal equation-of-state tables for astrophysical applications
OPAL opacities have recently helped to resolve a number of long-standing discrepancies between theory and observation. This success has made it important to provide the associated equation-of-stateExpand
Updated Opal Opacities
The reexamination of astrophysical opacities has eliminated gross discrepancies between a variety of observations and theoretical calculations; thus allowing for more detailed tests of stellarExpand
On the Use of Trigonometric Parallaxes for the Calibration of Luminosity Systems: Theory
Trumpler and Weaver (1953) discuss a systematic error which they attribute to the process of selecting stars by a lower limit in parallax values. The systematic error is introduced because, on theExpand
Solar models with helium and heavy-element diffusion
Helium and heavy-element diffusion are both included in precise calculations of solar models. In addition, improvements in the input data for solar interior models are described for nuclear reactionExpand
Asteroseismology of the β Cephei star ν Eridani – II. Spectroscopic observations and pulsational frequency analysis
Asteroseismology of the β Cephei star ν Eridani : II. Spectroscopic observations and pulsational frequency analysis
MNRAS, in preparation
  • Dziembowski W. A., Jerzykiewicz M.,
  • 2004