High-resolution optical spectroscopy of Plaskett's star

  title={High-resolution optical spectroscopy of Plaskett's star},
  author={N. Linder and Gregor Rauw and F. Martins and Hugues Sana and Micha{\"e}l De Becker and Eric Gosset},
  journal={Astronomy and Astrophysics},
Context. Plaskett’s star (HD 47 129) is a very massive O + O binary that belongs to the Mon OB2 association. Previous work suggests that this system displays the Struve-Sahade effect although the measurements of the secondary radial velocities are very difficult and give controversial results. Both components have powerful stellar winds that collide and produce a strong X-ray emission. Aims. Our aim is to study the physical parameters of this system in detail and to investigate the relation… 

Short-term spectroscopic variability of Plaskett’s star

Context. Plaskett’s star (HD 47129) is a very massive O-star binary in a post Roche-lobe overflow stage. CoRoT observations of this system revealed photometric variability with a number of

Plaskett's Star: Analysis of the CoRoT photometric data ?

Context. The second short run (SRa02) of the CoRoT space mission for asteroseismology was partly devoted to stars belonging to the Mon OB2 association. An intense monitoring has been performed on

Non-synchronous rotations in massive binary systems

Context. The OWN Survey has detected several O-type stars with composite spectra whose individual components show very different line broadening. Some of these stars have been revealed as binary

Evidence for a physically bound third component in HD 150136

Context. HD 150136 is one of the nearest systems harbouring an O3 star. Although this system was considered for a long time as a binary, more recent investigations have suggested the possible

A quantitative study of O stars in NGC 2244 and the Monoceros OB2 association

Aims. Our goal is to determine the stellar and wind properties of seven O stars in the cluster NGC 2244 and three O stars in the OB association Mon OB2. These properties give us insight into the mass

The Two Components of the Evolved Massive Binary LZ Cephei: Testing the Effects of Binarity on Stellar Evolution

Aims. We present an in-depth study of the two components of the binary system LZ Cep to constrain the effects of binarity on the evolution of massive stars. Methods. We analyzed a set of


With an orbital period of about 3.078 days, the double-lined spectroscopic binary HD 48099 is, until now, the only short-period O+O system known in the Mon OB2 association. Even though an orbital

Observational signatures of past mass-exchange episodes in massive binaries

Context. The role of mass and momentum exchanges in close massive binaries is very important in the subsequent evolution of the components. Such exchanges produce several observational signatures

Apsidal motion in the massive binary HD 152248

Context. Apsidal motion in massive eccentric binaries offers precious information about the internal structure of the stars. This is especially true for twin binaries consisting of two nearly

Fundamental parameters of massive stars in multiple systems: The cases of HD 17505A and HD 206267A

Context. Many massive stars are part of binary or higher multiplicity systems. The present work focusses on two higher multiplicity systems: HD 17505A and HD 206267A. Aims. Determining the



Tomographic separation of composite spectra. I - The components of Plaskett's Star

The UV photospheric lines of Plaskett's Star (HD 47129), a 14.4 day period, double lined O-type spectroscopic binary were analyzed. Archival data from IUE (17 spectra well distributed in orbital

The XMM–Newton view of Plaskett's star and its surroundings★

XMM–Newton data of Plaskett's star (HD 47129) are used in order to analyse its X-ray spectrum and variability and hence to derive further constraints on the wind interaction in this early-type binary

The massive binary CPD 41 7742 I. High-resolution optical spectroscopy ?

We present the results of a spectroscopic campaign on the early-type binary CPD 41 7742. For the first time, we unambiguously detect the secondary's spectral signature and derive an accurate orbital

HD 47129: the most massive binary.

Thirty-two coude spectrograms of Plaskett's star have been obtained. These show that the primary star has a stellar wind which is stronger from the following side of the star. New orbital elements

The spectrum of the very massive binary system WR 20a (WN6ha + WN6ha): Fundamental parameters and wind interactions

We analyse the optical spectrum of the very massive binary system WR 20a (WN6ha + WN6ha). The most prominent emission lines, Hα and He  λ 4686, display strong phase-locked profile variability. From

The Struve-Sahade Effect: A Tale of Three Stars

The "Struve-Sahade effect" (S-S effect) is the apparent weakness of lines of the secondary in massive binaries when the secondary is receding. This effect poses problems for the accurate

A spectroscopic search for colliding stellar winds in O-type close binary systems. II - Plaskett's star (HD 47129)

New evidence for colliding winds in the massive O-type binary system Plaskett's star is reported. High S/N ratio spectra of the H-alpha and He I 6678 emission lines are presented, and their orbital

Fourier method of determining the rotational velocities in OB stars

Aims. We present a comprehensive study that applies the Fourier transform to a sample of O and early B-type stars (either dwarfs, giants, or supergiants) to determine their projected rotational

The Struve-Sahade effect in the optical spectra of O-type binaries - I. Main-sequence systems (Corrigendum)

Aims.We present a spectroscopic analysis of four massive binary systems that are known or are good candidates to display the Struve-Sahade effect (defined as the apparent strengthening of the

A first detailed study of the colliding wind WR+O binary WR 30a

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 4.6 d. We propose the value . The