Now showing items 1-5 of 5

    • HD 164492C: A rapidly rotating, Hα-bright, magnetic early B star associated with a 12.5 d spectroscopic binary 

      Wade, Gregg A.; Shultz, Matthew E.; Sikora, J.; Bernier, M.E.; Rivinius, Th H.; Alécian, Evelyne; Petit, Véronique; Grunhut, Jason H.; The BinaMIcS Collaboration (2016-10-21)
      We employ high-resolution spectroscopy and spectropolarimetry to derive the physical properties and magnetic characteristics of the multiple systemHD164492C, located in the young open cluster M20. The spectrum reveals ...
    • Magnetic massive stars as progenitors of 'heavy' stellar-mass black holes 

      Petit, Véronique; Keszthelyi, Zsolt; MacInnis, R.; Cohen, David H.; Townsend, R.H.D.; Wade, Gregg A.; Thomas, S.L.; Owocki, Stanley P.; Puls, Joachim; Ud-Doula, Asif (2016-12-02)
      The groundbreaking detection of gravitational waves produced by the inspiralling and coalescence of the black hole (BH) binary GW150914 confirms the existence of 'heavy' stellar-mass BHs with masses > 25 M⊙. Initial ...
    • Modulated X-ray emission of the magnetic O8.5V-star Tr16-22 

      Nazé, Yaël; Wade, Gregg A.; Petit, Véronique (2014-09-25)
      Using an extensive X-ray dataset, we analyzed the X-ray emission of the massive O-star Tr16-22, which was recently found to be magnetic. Its bright X-ray emission is found to be modulated with a 54d period. This timescale ...
    • Possible pair-instability supernovae at solar metallicity from magnetic stellar progenitors 

      Georgy, Cyril; Meynet, Georges; Ekström, Sylvia; Wade, Gregg A.; Petit, Véronique; Keszthelyi, Zsolt; Hirschi, Raphael (2017-03-01)
      Near-solar metallicity (and low-redshift) pair-instability supernova (PISN) candidates challenge stellar evolution models. Indeed, at such a metallicity, even an initially very massive star generally loses so much mass by ...
    • X-ray emission from magnetic massive stars 

      Nazé, Yaël; Petit, Véronique; Rinbrand, Melanie; Cohen, David H.; Owocki, Stanley P.; Ud-Doula, Asif; Wade, Gregg A. (2014-10-30)
      Magnetically confined winds of early-type stars are expected to be sources of bright and hard X-rays. To clarify the systematics of the observed X-ray properties, we have analyzed a large series of Chandra and XMM-Newton ...