Pseudocepheids. I - R Puppis, HR 4441, HR 4511, and AI CMI

Details Pseudocepheids. I - R Puppis, HR 4441, HR 4511, and AI CMI Pseudocepheids. I - R Puppis, HR 4441, HR 4511, and AI CMI

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983aj.....88..386e&link_type=abstract

Astronomical Journal, vol. 88, Mar. 1983, p. 386-403.

Astronomy and Astrophysics

Astronomy

23

Stellar Envelopes, Stellar Luminosity, Stellar Spectrophotometry, Supergiant Stars, Variable Stars, Cepheid Variables, Early Stars, Hertzsprung-Russell Diagram, Interstellar Extinction, Light Curve, Stellar Color, Stellar Magnitude

Scientific paper

The pseudocepheids (PC) are defined as supergiants in the Hertzsprung gap with light variations more erratic than those of cepheids. The present paper is concerned with four PC that are probably all high-mass objects and which are representative of the current observing program. Intermediate band and Hβ photometry is used to derive light curves, reddening, color indices, absolute magnitudes and distances. R Pup and HR 4441 are apparently very high-luminosity stars for which the photometric indices are not complicated by photometrically unresolved companions or circumstellar material. HR 4511 illustrates the effect of a close, early-type companion, and the photometry of AI CMi may be strongly affected by circumstellar material.

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