H I sheets ejected by M32 from M31 and multiple disk radial velocities

Abstract

view Abstract Citations (20) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS H I sheets ejected by M32 from M31 and multiple disk radial velocities. Byrd, G. G. Abstract Earlier work has shown by computer simulation that the gravity of M32, the companion galaxy which orbits M31, can produce asymmetries in the radial-velocity pattern of the projected disk of M31 similar to those observed at 21 cm wavelengths. The same orbit also ejects a sheet of material far enough from the plane to produce multiple-valued H I radial velocities over areas where both sheet and disk are superposed. The present investigation is a detailed study of the sheet generated by computer simulation. Reasonable agreement can be obtained between the simulated sheet radial-velocity pattern and 21 cm observations over part of the disk of multiple-valued velocities by Roberts and Whitehurst. The model is used to predict the multiple velocity patterns over the rest of M31's disk. The computer model sheet material is thrown over 10 kpc from M31's disk in a complex shape. Publication: The Astrophysical Journal Pub Date: November 1977 DOI: 10.1086/155659 Bibcode: 1977ApJ...218...86B Keywords: Andromeda Galaxy; Galactic Structure; Gas Dynamics; Gravitational Effects; Astronomical Models; Computerized Simulation; Disks (Shapes); Hydrogen; Radial Velocity; Astrophysics full text sources ADS |