Issue |
A&A
Volume 501, Number 1, July I 2009
|
|
---|---|---|
Page(s) | 291 - 295 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361/200810271 | |
Published online | 29 April 2009 |
Research Note
The nature of the line profile variability in the spectrum of the massive binary HD 152219
European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago 19, Chile e-mail: hsana@eso.org
Received:
27
May
2008
Accepted:
21
March
2009
Context. HD 152219 is a massive binary system with O9.5 III + B1-2 V/III components and a short orbital period of 4.2 d. Its primary component further displays clear line profile variability (LPV). The primary component being located within the pulsational instability domain predicted for high-luminosity stars, we previously suggested that the observed LPV could be associated with non-radial pulsations.
Aims. The aim of the present work is to determine the nature of the observed LPV in the spectrum of the primary component of HD 152219.
Methods. During a 4-night FEROS monitoring campaign, we collected a new set of 134 high signal-to-noise spectra. These new observations were then used to re-investigate the variability of different line profiles in the spectrum of HD 152219.
Results. Based on the present analysis, we discard the non-radial pulsations and point out the Rossiter-McLaughlin effect as the cause of the LPV in HD 152219. The upper limit on the amplitude of possible weak pulsations is set at a few parts per thousand of the continuum level.
Key words: stars: individual: HD 152219 / stars: oscillations / binaries: close / binaries: spectroscopic / stars: early-type / line: profiles
© ESO, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.