Long Term Observations of Type II Cepheids

Details Long Term Observations of Type II Cepheids Long Term Observations of Type II Cepheids

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005soust..44a..28p&link_type=abstract

Southern Stars. The Journal of the Royal Astronomical Society of New Zealand (ISSN 0049-1640), Vol. 44, No. 1, p. 28 - 32 (2005)

Astronomy and Astrophysics

Astronomy

Scientific paper

The variability of Type I (or Classical) Cepheids has been extensively studied and our understanding of their pulsation mechanism and evolutionary status is very well established. These variables are young, massive population I stars which inhabit the disks of spiral galaxies and are thus useful tracers of the young stellar population in these galaxies. The Type II Cepheids appear in a similar part of the Hertzsprung-Russell diagram and exhibit similar light curve and are easy to confuse with Type I Cepheids. However, they are smaller, fainter less massive population II variables, and we find them in globular clusters, the halo and the thick disk of the Galaxy. Type II Cepheids are therefore useful tracers of this older stellar population.

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