J/A+A/501/291 Spectroscopic observations of HD 152219 (Sana, 2009)
The nature of the line profile variability in the spectrum of the massive binary
HD 152219.
Sana H.
<Astron. Astrophys. 501, 291 (2009)>
=2009A&A...501..291S 2009A&A...501..291S
ADC_Keywords: Binaries, spectroscopic - Observatory log - Radial velocities
Keywords: stars: individual: HD 152219 - stars: oscillations - binaries: close -
binaries: spectroscopic - stars: early-type - line: profiles
Abstract:
HD 152219 is a massive binary system with O9.5 III + B1-2 V/III
components and a short orbital period of 4.2d. 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. 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. 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. 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.
Description:
Journal the spectroscopic observations of HD 152219 and radial
velocity measurements of the Hbeta, HeI 4712, 4921, 5875, 6678 and
HeII l4686 primary lines. Measurements made on data from Paper I (Sana
et al., 2008, Cat. J/MNRAS/386/447) have also been included.
Objects:
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RA (2000) DE Designation(s)
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16 53 55.6 -41 52 51 HD 152219 = NSV 8017
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 185 Journal the spectroscopic observations
and RV measurements of HD 152219
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See also:
J/MNRAS/386/447 : RV catalogue of O-type stars in NGC 6231 (Sana+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 --- HJD Heliocentric Julian date (1)
14- 18 F5.3 --- Phi Orbital phase (2)
20- 23 I4 s Exp Exposure time
25- 27 I3 --- SNR Signal-to-noise ratio (3)
29- 34 F6.1 km/s RV4860 Hbeta primary radial velocity
36- 41 F6.1 km/s RV4686 HeII 4686 primary radial velocity
43- 48 F6.1 km/s RV4713 HeI 4713 primary radial velocity
50- 55 F6.1 km/s RV4922 HeI 4922 primary radial velocity
57- 62 F6.1 km/s RV5015 HeI 5015 primary radial velocity
64- 69 F6.1 km/s RV6678 HeI 6678 primary radial velocity
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Note (1): The heliocentric Julian date is computed at mid-exposure.
Note (2): The quoted phase correspond to HeII 4686 ephemeris of Table 3.
Note (3): The Signal-to-Noise ratio (SNR) is relative to the continuum and
is measured in the range 4740-4750 angstroms.
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Acknowledgements:
Hugues Sana, hsana(at)eso.org
(End) Hugues Sana [ESO, Chile], Patricia Vannier [CDS] 11-May-2009