V745\,Cassiopeia: an interacting young massive binary in a multiple star system

Abstract

We present spectroscopic observations of the massive early type system V745\,Cas, embedded in a multiple star system. The brightest star of the system is the eclipsing binary V745\,Cas with an orbital period of 1.41 days. The radial velocities of both components and light curves obtained by $INTEGRAL$ and $Hipparcos$ missions were analysed. The components of V745\,Cas are shown to be a B0\,V primary with a mass M${}_p$=18.31$\pm$0.51 M${}_{\odot }$ and radius R${}_p$=6.94$\pm$0.07 R${}_{\odot }$ and a B(1-2)\,V secondary with a mass M${}_s$=10.47$\pm$0.28 M${}_{\odot }$ and radius R${}_s$=5.35$\pm$0.05 R${}_{\odot }$. Our analysis shows that both components fill their corresponding $Roche$ lobes, indicating double contact configuration. Using the UBVJHK magnitudes and interstellar absorption we estimated the mean distance to the system as 1700$\pm$50\,pc. The locations of the component stars in the mass-luminosity, mass-radius, effective temperature-mass and surface gravity-mass are in agreement with those of the main-sequence massive stars. We also obtained $UBV$ photometry of the three visual companions and we estimate that all are B-type stars based upon their de-reddened colours.We suspect that this multiple system is probably a member of the Cas OB4 association in the $Perseus$ arm of the $Galaxy$.

21 pages, 7 figures Accepted by MNRAS

References in corpus (23)

• Validation of the new Hipparcos reduction
• Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
• Accurate masses and radii of normal stars: modern results and applications
• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• A Grid of NLTE Line-Blanketed Model Atmospheres of Early B-type Stars
• Astrophysical parameters of Galactic open clusters
• The Indo-U.S. Library of Coude Feed Stellar Spectra
• The VLT-FLAMES Tarantula Survey VIII. Multiplicity properties of the O-type star population
• The IACOB project: I. Rotational velocities in Northern Galactic O and early B-type stars revisited. The impact of other sources of line-broadening
• Ten eclipsing binaries in the Small Magellanic Cloud: fundamental parameters and SMC distance
• Formation of contact in massive close binaries
• Coude-feed stellar spectral library - atmospheric parameters
• Absolute dimensions of detached eclipsing binaries. I. The metallic-lined system WW Aurigae
• The first INTEGRAL-OMC catalogue of optically variable sources
• Rotational velocities of A-type stars I. Measurement of vsini in the southern hemisphere
• Kinematics of OB-associations and the new reduction of the Hipparcos data
• Photometric and Spectroscopic Studies of Massive Binaries in the Large Magellanic Cloud. I. Introduction and Orbits for Two Detached Systems: Evidence for a Mass Discrepancy?
• The Close Binary Properties of Massive Stars in the Milky Way and Low-Metallicity Magellanic Clouds
• Simulations for Multi-Object Spectrograph Planet Surveys
• Tomographic Separation of Composite Spectra. XI. The Physical Properties of the Massive Close Binary HD 100213 (TU Muscae)
• MY Serpentis: a high-mass triple system in the Ser OB2 association
• NGC 146: A young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars
• Photometric survey of marginally investigated open clusters: I. Basel 11b, King 14, Czernik 43

Cited by in corpus (6)

• V606 Cen: A Newly Formed Massive Contact Binary in a Hierarchical Triple System
• Determination of the Galactic Rotation Curve from OB Stars
• Massive stars in the SDSS-IV/APOGEE SURVEY. I- OB stars
• Modeling contact binaries, III. Properties of a population of close, massive binaries
• The early B-type eclipsing binary GT\,Cephei: a massive triple system?
• MONOS: Multiplicity Of Northern O-type Spectroscopic systems. III. New orbits and Gaia TESS analysis for 10 SB2E systems