Theoretical interpretations of anomalous Cepheid pulsations

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165960· OSTI ID:5333399

Cox, A N; Proffitt, C R

Detailed pulsation studies have been made of five anomalous Cepheids in the Draco galaxy, one in the galactic globular cluster NGC 5466 and a possible anomalous Cepheid in M15. Observed quantities are periods, luminosities, and effective temperatures. Pulsation masses range from 1.0 to 1.8 solar masses, as found by others before. The variables with effective temperatures above 7000 K seem to be in the first overtone radial mode, while the others are fundamental pulsators. Investigations show that the masses and pulsation modes are independent of the assumed composition and details of the convection such as inclusion of the considerable turbulent pressure as part of the total pressure in the convection zone. 19 references.

• Research Organization: Los Alamos National Lab., NM (USA); Washington Univ., Seattle (USA)
• OSTI ID: 5333399
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 324; ISSN ASJOA
• 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
COSMIC RADIO SOURCES
HIGH TEMPERATURE
LUMINOSITY
MASS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PULSARS
PULSATING VARIABLE STARS
PULSATIONS
STAR CLUSTERS
STARS
VARIABLE STARS