Fueling starburst galaxies with gas-rich mergers

view Abstract Citations (929) References (47) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Fueling Starburst Galaxies with Gas-rich Mergers Barnes, Joshua E. ; Hernquist, Lars E. Abstract We model the dynamics of gas in a merger of two disk/halo galaxies of equal mass using a hybrid N-body/ gasdynamics code. Violent tidal forces acting on the disks draw out extended tails and trigger the formation of central bars. As such bars form, gas in the inner half of each disk loses most of its angular momentum through gravitational torques and falls into a compact cloud within the center of the galaxy. These nuclear gas clouds merge when their parent galaxies do, resulting in the rapid assembly of ~ 5 x 10^9^ M_sun_ of gas, which may plausibly be identified with the large central clouds seen in CO observations of galaxies such as NGC 520. Violent star formation in such central gas clouds, which seems inevitable, offers a likely explanation for luminous IRAS galaxies and may contribute significantly to the central stellar populations of merger remnants. If some of the nuclear gas can continue to lose angular momentum, it may be able to fuel or even form a central black hole, resulting in a radio galaxy or possibly even a quasar. Publication: The Astrophysical Journal Pub Date: April 1991 DOI: 10.1086/185978 Bibcode: 1991ApJ...370L..65B Keywords: Galactic Evolution; Galactic Nuclei; Galactic Structure; Intergalactic Media; Star Formation; Starburst Galaxies; Angular Momentum; Astronomical Models; Gas Dynamics; Gravitational Effects; Astrophysics; GALAXIES: EVOLUTION; GALAXIES: FORMATION; GALAXIES: INTERACTIONS; GALAXIES: INTERGALACTIC MEDIUM; GALAXIES: INTERNAL MOTIONS; GALAXIES: NUCLEI; GALAXIES: STRUCTURE full text sources ADS | data products SIMBAD (2)