Radius, rotational period and inclination of the Be stars in the Be/gamma-ray binaries MWC 148 and MWC 656

Abstract

Using TESS photometry and Rozhen spectra of the Be/gamma-ray binaries MWC 148 and MWC 656, we estimate the projected rotational velocity ($v\sin i$), the rotational period (P${}_{\mathrm{rot}}$), radius (R${}_1$), and inclination ($i$) of the mass donor. For MWC 148 we derive P${}_{\mathrm{rot}}=1.10\pm 0.03$~d, R${}_1=9.2\pm 0.5$~R${}_{\odot }$, $i=40^{\circ }\pm 2^{\circ }$, and $v\sin i=272\pm 5$~km~s${}^{-1}$. For MWC 656 we obtain P${}_{\mathrm{rot}}=1.12\pm 0.03$~d, R${}_1=8.8\pm 0.5$~R${}_{\odot }$, $i=52^{\circ }\pm 3^{\circ }$, and $v\sin i=313\pm 3$~km~s${}^{-1}$. For MWC 656 we also find that the rotation of the mass donor is coplanar with the orbital plane.

arXiv comment6 pages, Accepted by Astronomische Nachrichten / Astronomical Notes

References in corpus (29)

• The Transiting Exoplanet Survey Satellite
• Be/X-ray binaries
• Variable Very High Energy Gamma-ray Emission from the Microquasar LS I +61 303
• Discovery of the Binary Pulsar PSR B1259-63 in Very-High-Energy Gamma Rays around Periastron with H.E.S.S
• Discovery of very high energy gamma-rays associated with an X-ray binary
• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Gamma-ray binaries: pulsars in disguise ?
• A Be-type star with a black hole companion
• Accretion vs colliding wind models for the gamma-ray binary LS I +61 303: an assessment
• Discovery of a point-like very-high-energy gamma-ray source in Monoceros
• Tidal Warping of Be Star Decretion Discs
• On the binary nature of the gamma-ray sources AGL J2241+4454 (=MWC 656) and HESS J0632+057 (=MWC 148)
• A Luminous Gamma-ray Binary in the Large Magellanic Cloud
• Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057
• Supernova Kicks and Misaligned Be Star Binaries
• HD 259440: The Proposed Optical Counterpart of the gamma-ray Binary HESS J0632+057
• The Be Star HD 215227: A Candidate Gamma-ray Binary
• The First Simultaneous X-Ray/Radio Detection of the First Be/BH System MWC 656
• Rotational and Cyclical Variability in gamma Cassiopeia
• Revealing Gamma-Ray Binaries
• Long-term periodicity in LSI+61303 as beat frequency between orbital and precessional rate
• A photometric study of Be stars located in the seismology fields of COROT
• GeV detection of HESS J0632+057
• A hydrodynamics-informed, radiation model for HESS J0632$+$057 from radio to gamma rays
• Orbital solution leading to an acceptable interpretation for the enigmatic gamma-ray binary HESS J0632+057
• Optical spectroscopy of Be/gamma-ray binaries
• HESS J0632+057: hydrodynamics and nonthermal emission
• MAGIC observations of MWC 656, the only known Be/BH system
• Probing the Properties of the Pulsar Wind in the Gamma-Ray Binary HESS J0632+057 with NuSTAR and VERITAS Observations

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• Optical spectroscopy of the Be/black hole binary MWC656 -- interaction of a black hole with a circumstellar disc
• Optical and Near-Infrared Monitoring of Gamma-ray Binaries Hosting Be Stars
• Ultraviolet spectroscopy reveals a hot and luminous companion to the Be star+black hole candidate MWC 656
• X-ray imaging observations of the high-mass gamma-ray binary HESS J0632+057