HYDRODYNAMICAL SIMULATIONS OF THE BARRED SPIRAL GALAXY NGC 1097

Research output: Contribution to journalArticle

Abstract

NGC 1097 is a nearby barred spiral galaxy believed to be interacting with the elliptical galaxy NGC 1097A located to its northwest. It hosts a Seyfert 1 nucleus surrounded by a circumnuclear starburst ring. Two straight dust lanes connected to the ring extend almost continuously out to the bar. The other ends of the dust lanes attach to two main spiral arms. To provide a physical understanding of its structural and kinematical properties, two-dimensional hydrodynamical simulations have been carried out. Numerical calculations reveal that many features of the gas morphology and kinematics can be reproduced provided that the gas flow is governed by a gravitational potential associated with a slowly rotating strong bar. By including the self-gravity of the gas disk in our calculation, we have found the starburst ring to be gravitationally unstable, which is consistent with the observation in Hsieh et al. Our simulations show that the gas inflow rate is 0.17 M-circle dot yr(-1) into the region within the starburst ring even after its formation, leading to the coexistence of both a nuclear ring and a circumnuclear disk.

Details

Authors
  • Lien-Hsuan Lin
  • Hsiang-Hsu Wang
  • Pei-Ying Hsieh
  • Ronald E. Taam
  • Chao-Chin Yang
  • David C. C. Yen
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Astronomy, Astrophysics and Cosmology

Keywords

  • galaxies: structure, starburst, galaxies: spiral, galaxies: Seyfert, kinematics and dynamics, galaxies:, galaxies: evolution, galaxies: individual (NGC 1097)
Original languageEnglish
Article number8
JournalAstrophysical Journal
Volume771
Issue number1
Publication statusPublished - 2013
Publication categoryResearch
Peer-reviewedYes