Infrared helium–hydrogen line ratios as a measure of stellar effective temperature

@inproceedings{Lumsden2001InfraredHL,
  title={Infrared helium–hydrogen line ratios as a measure of stellar effective temperature},
  author={Stuart Leonard Lumsden and Phil J. Puxley and M. G. Hoare Department of Physics and Astronomy and University of Leeds and UK Gemini Observatory and Hilo and Hawaii Anglo-Australian Observatory and Epping and Nsw and Australia.},
  year={2001}
}
  • Stuart Leonard Lumsden, Phil J. Puxley, +8 authors Australia.
  • Published 2001
  • Physics
  • We have observed a large sample of compact planetary nebulae in the near-infrared to determine how the 21P–21S He i line at 2.058 μm varies as a function of stellar effective temperature, Teff. The ratio of this line with H i Brγ at 2.166 μm has often been used as a measure of the highest Teff present in a stellar cluster, and hence of whether there is a cut-off in the stellar initial mass function at high masses. However, recent photoionization modelling has revealed that the behaviour of this… CONTINUE READING