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The Temperature and Continuum of the N Stars

Published online by Cambridge University Press:  25 April 2016

M. S. Bessell  and
Lee Youngbom
M. S. Bessell
Affiliation:
Mount Stromlo and Siding Spring Observatories The Australian National University
Lee Youngbom
Affiliation:
Mount Stromlo and Siding Spring Observatories The Australian National University
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Extract

On the basis of (R — I) colours it has been suggested that the N stars (the cool carbon stars) occupy a very restricted region in the Mb01 — log Te diagram (Te = 3300 to 3500 K) Mb01 ~ —3), falling on the normal giant sequence, but hotter than the M variables. This appeared somewhat puzzling in view of the variability of many of the carbon stars and their large range of periods, which suggested that the N stars ought perhaps to have similar temperatures to the variable M stars. In order to compare the continua of the M stars and N stars within the range of the R and I filters, and also to determine the continuum between the molecular bands, photometric observations were made of 20 M and N stars at carefully chosen wavelengths with 30Å resolution.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 3 , October 1972 , pp. 154 - 155
Copyright
Copyright © Astronomical Society of Australia 1972

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References

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