Abstract
view Abstract Citations (85) References (51) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Segregation of Gas and Stars in Shell Galaxies Weil, Melinda L. ; Hernquist, Lars Abstract Using a code which is capable of evolving composite systems of collisionless matter and gas, we explore mergers like those thought responsible for the shells seen around many elliptical galaxies. If a small companion containing both gas and stars is accreted by a more massive primary the stellar and gaseous debris are rapidly segregated: while the stars are free to oscillate back and forth in the primary's potential, thereby forming shells, the oppositely directed flows near the center of the primary effectively dissipate the orbital kinetic energy of the gas. Consequently the gas settles into compact disks or rings in the nucleus of the primary depending on orbital parameters. We note implications of these findings for the production of polar rings and the onset of nuclear activity in galaxies. Publication: The Astrophysical Journal Pub Date: March 1993 DOI: 10.1086/172347 Bibcode: 1993ApJ...405..142W Keywords: Elliptical Galaxies; Galactic Evolution; Interacting Galaxies; Shell Galaxies; Astronomical Models; Galactic Nuclei; Interstellar Matter; Astrophysics; GALAXIES: ELLIPTICAL AND LENTICULAR; CD; GALAXIES: INTERACTIONS; GALAXIES: ISM; GALAXIES: NUCLEI full text sources ADS | data products SIMBAD (7)
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