NGC6231: X-ray Properties of the Early-Type Star Population (2007)
Sana, H, Naze, Yaël, Gosset, Eric, Rauw, Grégor, Sung, H, Vreux, J-M
Based on a deep XMM-Newton observation of the young open cluster NGC6231, we derive the main X-ray properties of its early-type star population. Among the 610 X-ray sources detected in the field, 42...
Van Der Hucht, K A, Raassen, A J J, Mewe, R, Antokhin, I I, Rauw, Grégor, Vreux, J-M, ...
We report the analysis of high- and medium-resolution X-ray spectra of the Wolf-Rayet (WR) objects WR25 (HD93162, WN6h+O4f) and WR11 (gamma[SUP]2[/SUP] Velorum, WC8+O7.5III, P =78.53 d), obtained...
An Exceptional X-ray View of the Young Open Cluster NGC 6231: What XMM-Newton Has Taught Us (2006)
Sana, H, Gosset, Eric, Rauw, Grégor, Vreux, J-M
Considered as the core of the Sco OB1 association, the young open cluster NGC 6231 harbours a rich O-type star population. In 2001, the XMM-Newton satellite targeted the cluster for a nominal...
CPD-41° 7742: an unusual wind interaction (2005)
Sana, H, Gosset, Eric, Rauw, Grégor, Antokhina, E, Royer, P, Manfroid, Jean, ...
We summarize the results of a multiwavelength observing campaign on the massive eclipsing binary CPD-41° 7742, another remarkable object in the young open cluster NGC 6231. Our campaign relies on...
Antokhin, I I, Rauw, Grégor, Vreux, J-M, Van Der Hucht, K A
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Searching for Colliding-Wind Signatures in a Sample of O-Star Binaries (2002)
Rauw, Grégor, Sana, H, Vreux, J-M, Gosset, Eric, Stevens, I R
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Optical Spectroscopy of Colliding-Wind Systems to be Observed with XMM (2002)
Sana, H, Rauw, Grégor, Gosset, Eric, Vreux, J-M
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A first detailed study of the colliding wind WR+O binary WR 30a (2001)
Gosset, Eric, Royer, P, Rauw, Grégor, Manfroid, Jean, Vreux, J-M
We present a detailed, extensive investigation of the photometric and spectroscopic behaviour of WR 30a. This star is definitely a binary system with a period around 4.6d. We propose the value...
Rauw, Grégor, Sana, H, Antokhin, I I, Morrell, N I, Niemela, V S, Albacete Colombo, J F, ...
We discuss the orbital elements of the multiple system Tr 16-104 which is usually believed to be a member of the open cluster Trumpler 16 in the Carina complex. We show that Tr 16-104 could be a...
What is the real nature of HD 108? (2001)
Naze, Yaël, Vreux, J-M, Rauw, Grégor
Since the beginning of the past century, the nature of HD 108 has been a subject of intense debate. One after another, astronomers explored its variability and attributed it either to binarity, or to...
The strange case of the massive binary HD 149404 (2001)
Rauw, Grégor, Naze, Yaël, Carrier, F, Burki, G, Gosset, Eric, Vreux, J-M
We report the analysis of an extensive set of high-resolution spectroscopic observations of the massive binary system HD 149404. We compare different techniques to measure the radial velocities of...
The spectral variability of HD 192639 and its implications for the star's wind structure (2001)
Rauw, Grégor, Morrison, N D, Vreux, J-M, Gosset, Eric, Mulliss, C L
We report the analysis of an extensive set of spectroscopic data of the O(f) supergiant HD 192639. A Fourier analysis of our time-series reveals a recurrent variability with a ``period'' of roughly...
Kahn, S M, Leutenegger, M A, Cottam, J, Rauw, Grégor, Vreux, J-M, ...
We present the first high resolution X-ray spectrum of the bright O4Ief supergiant star zeta Puppis, obtained with the Reflection Grating Spectrometer on-board XMM-Newton. The spectrum exhibits...
A new orbital solution for the massive binary system HD 93403 (2000)
Rauw, Grégor, Sana, H, Gosset, Eric, Vreux, J-M, Jehin, Emmanuel, Parmentier, Geneviève
We present a spectroscopic analysis of the early-type massive binary system HD 93403. Using high resolution optical spectra, we clearly separate the primary and secondary components. For the first...
Rauw, Grégor, Vreux, J-M, Bohannan, B
We present an analysis of an extensive set of spectroscopic observations of the mysterious early-type binary BD +40 deg4220. A new orbital solution is derived from the radial velocities of the...
Line profile variability in the spectrum of the O(f) supergiant HD 192639 (1998)
We report the results of a medium-resolution spectroscopic investigation of the O(f) supergiant HD 192639. Particular attention is paid to the He {ii}\ lambda 4686 line. This line displays strong...
WR22: the most massive Wolf-Rayet star ever weighed. (1996)
Rauw, Grégor, Vreux, J-M, Gosset, Eric, Hutsemekers, Damien, Magain, Pierre, Rochowicz, K
The results of an extensive spectroscopic campaign on the eclipsing binary WR22 are presented. A new radial velocity curve is deduced for the WN7 component, allowing us to improve the parameters of...
Existence of a short period (3.5-4 hours) in the photometric variability of WR66. (1996)
Rauw, Grégor, Gosset, Eric, Manfroid, Jean, Vreux, J-M, Claeskens, J-F
We report here on an independent detection of a short period (~4hours) in the photometric variations of WR66, thus confirming in broad terms the discovery by Antokhin et al.. In addition, we present...
A new orbital solution for the WNL binary system WR12 (1996)
Rauw, Grégor, Vreux, J-M, Gosset, Eric, Manfroid, Jean, Niemela, V S
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A seven year campaign on WR 22 (1995)
Rauw, Grégor, Vreux, J-M, Gosset, Eric, Hutsemekers, Damien, Magain, Pierre, Manfroid, Jean, ...
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A seven year campaign on WR 22 (1995)
Rauw, Grégor, Vreux, J-M, Gosset, Eric, Hutsemekers, Damien, Magain, Pierre, Manfroid, Jean, ...
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