Browsing by Subject "Subdwarfs"

Now showing items 1-6 of 6

    • EC 10246-2707: a new eclipsing sdB + M dwarf binary⋆ 

      Barlow, B.N.; Kilkenny, David; Drechsel, H.; Dunlap, B.H. (OUP, 2013)
      We announce the discovery of a new eclipsing hot subdwarf B + M dwarf binary, EC 10246-2707, and present multi-colour photometric and spectroscopic observations of this system. Similar to other HW Vir-type binaries, the ...

    • The Edinburgh-Cape Blue Object Survey - III. Zone 2; galactic latitudes -30? > b > -40? 

      Kilkenny, David; Koen, Chris; Hambly, N.; MacGillivray, H.; Stobie, R. S.; O’Donoghue, D. (Oxford University Press, 2013)
      The Edinburgh–Cape Blue Object Survey seeks to identify point sources with an ultraviolet excess. Results for zone 2 of the survey are presented here, covering that part of the South Galactic Cap between 30◦ and 40◦ from ...

    • JL 82: a slowly pulsating hot subdwarf star in a close binary system 

      Koen, Chris (Oxford University Press, 2009)
      JL 82 is a known binary, consisting of an sdB star and a companion which is not directly observable in the optical. Photometric measurements reported in this paper show it to variable with both the binary period (∼0.75 ...

    • KPD 0629–0016, a slowly pulsating hot subdwarf star 

      Koen, Chris; Green, E.M. (Oxford University Press, 2007)
      The results of nine CCD photometric observing runs on KPD 0629–0016 are presented. During six of the runs measurements were obtained alternately through B and V filters. Four periodicities, for which there is good agreement ...

    • Pulsations and eclipse-time analysis of HWVir 

      Baran, A. S.; Østensen, R. H.; Telting, J. H.; Vos, J.; Kilkenny, D.; Vuckovic, M.; Reed, M. D.; Silvotti, R.; Jeffery, C. S.; Parsons, S. G.; V. S. Dhillon, V. S.; Marsh, T. R. (Oxford University Press, 2018)
      We analysed recent K2 data of the short-period eclipsing binary systemHWVir,which consists of a hot subdwarf-B type primary with an M-dwarf companion.We determined the mid-times of eclipses, calculated O–C diagrams, and ...

    • Two new pulsating hot subdwarf stars from the Edinburgh-Cape survey 

      Kilkenny, David; O'Donoghue, D.; Crause, L.; Engelbrecht, C.; Hambly, N.; MacGillivray, H. (Oxford University Press, 2009)
      We report the discovery of very rapid pulsations in two hot subdwarf stars from the Edinburgh- Cape blue object survey. The short periods, small amplitudes and multiperiodicity establish these stars as members of the ...