FUSE determination of the abundances of iron-peak elements in the PG 1716+426 stars

J. P. Blanchette, P. Chayer, F. Wesemael, G. Fontaine, M. Fontaine, J. Dupuis, J. W. Kruk, E. M. Green

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We present preliminary analysis of the FUSE spectra of five PG1716+426 stars, the subgroup of sdB stars that exhibit very low amplitude, long-period multiperiodic luminosity variations. Our aim is to investigate whether these stars display abundances of iron-peak elements which differ from those observed in the shorter-period EC 14026 stars and in non-variable sdB stars. Our preliminary results suggest that the abundances of Fe, Mn, Co and Ni in PG 1716+426 stars do not differ appreciably from those measured in our reference samples. The implications of these findings for non-adiabatic calculations which link the driving of both the long- and short-period pulsations to an opacity bump associated with a local enhancement of the abundance of iron and iron-peak elements in the envelope are briefly discussed.

Original languageEnglish (US)
Pages (from-to)301-304
Number of pages4
JournalBaltic Astronomy
Issue number2
StatePublished - 2006


  • Stars: abundances
  • Stars: hot subdwarfs
  • Stars: individual (PG 1716+426, PG1627+017, PG1338+481, PG 0101+039, PHL457)
  • Stars: oscillations
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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