Sinusoidal cepheids as first-overtone pulsators

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Publ. Astron. Soc. Pac.; (United States)

DOI:https://doi.org/10.1086/130641· OSTI ID:6807115

Connolly, L P

New photometry is presented for a group of sinusoidal cepheids in the Large Magellanic Cloud. Although they appear to mix well with normal cepheids in the instability strip they form a unique, parallel, period-luminosity relation to that of normal cepheids. Excellent agreement is found with theoretical fundamental and first-overtone blue edges indicating that the sinusoidal cepheids are pulsating in their first-overtone. This agreement with the blue edges is only valid for an LMC distance modulus of 18.56. The sinusoidal cepheids in the LMC have the same luminosity as the Galactic double-mode cepheids. The reason for this is not understood.

• OSTI ID: 6807115
• Journal Information: Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 92; ISSN PASPA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CEPHEIDS
EMISSION SPECTRA
GALAXIES
LUMINOSITY
MAGELLANIC CLOUDS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PULSATING VARIABLE STARS
SPECTRA
SPECTROPHOTOMETRY
STARS
VARIABLE STARS