Published January 1990 | Version v1
Journal article Metadata-only

The dynamical mass of S Muscae

Creators

  • 1. Canterbury Univ., Christchurch (New Zealand)
  • 2. Washington Univ., Seattle (USA)
  • 3. NASA, Goddard Space Flight Center, Greenbelt, MD (USA)

Description

The amplitudes and phase relations of pulsational velocities of the Cepheid S Muscae, measured for lines originating at different atmospheric depths, are investigated. A mass M(A) = 4.4 + or - 0.5 solar masses is found for the Cepheid; however, the Cepheid is the evolved star and should have a mass larger than that of its companion. If the measured velocity differences are too low by 2.5 km/s on the average, then the mass ratio M(B)/M(A) may be decreased to 0.94, giving an estimated upper limit to the Cepheid mass of 6.1 solar masses, consistent with the Cepheid being the more evolved star. Considering all the uncertainties, it is concluded that the mass of the Cepheid is between 4.6 and 6.1 solar masses. 34 refs

Additional details

Publishing Information

Journal Title
Astronomical Journal
Journal Volume
99
Series
Astron. J.
Journal Page Range
353-372
ISSN
0004-6256
CODEN
ANJOA

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
22001052
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
BINARY STARS; CEPHEIDS; DYNAMICS; LIMITING VALUES; MAIN SEQUENCE STARS; MASS; RADIAL VELOCITY; STAR EVOLUTION; ULTRAVIOLET RADIATION
Descriptors DEC
ELECTROMAGNETIC RADIATION; MECHANICS; PULSATING VARIABLE STARS; RADIATIONS; STARS; VARIABLE STARS; VELOCITY