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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
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: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 16 53 55.6 -41 52 51 HD 152219 = NSV 8017 ----------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 69 185 Journal the spectroscopic observations and RV measurements of HD 152219
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
Bytes Format Units Label Explanations
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
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.
Acknowledgements: Hugues Sana, hsana(at)eso.org
(End) Hugues Sana [ESO, Chile], Patricia Vannier [CDS] 11-May-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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