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HYDRODYNAMICAL SIMULATIONS OF THE BARRED SPIRAL GALAXY NGC 1097

Lin, Lien-Hsuan; Wang, Hsiang-Hsu; Hsieh, Pei-Ying; Taam, Ronald E.; Yang, Chao-Chin LU and Yen, David C. C. (2013) In Astrophysical Journal 771(1).
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
galaxies: structure, starburst, galaxies: spiral, galaxies: Seyfert, kinematics and dynamics, galaxies:, galaxies: evolution, galaxies: individual (NGC 1097)
in
Astrophysical Journal
volume
771
issue
1
publisher
American Astronomical Society
external identifiers
  • wos:000321274200008
  • scopus:84879028079
ISSN
0004-637X
DOI
10.1088/0004-637X/771/1/8
language
English
LU publication?
yes
id
3cc00728-384a-40be-baef-5861cf53bf9f (old id 3973987)
date added to LUP
2013-08-21 14:59:24
date last changed
2019-02-20 05:21:10
@article{3cc00728-384a-40be-baef-5861cf53bf9f,
  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.},
  articleno    = {8},
  author       = {Lin, Lien-Hsuan and Wang, Hsiang-Hsu and Hsieh, Pei-Ying and Taam, Ronald E. and Yang, Chao-Chin and Yen, David C. C.},
  issn         = {0004-637X},
  keyword      = {galaxies: structure,starburst,galaxies: spiral,galaxies: Seyfert,kinematics and dynamics,galaxies:,galaxies: evolution,galaxies: individual (NGC 1097)},
  language     = {eng},
  number       = {1},
  publisher    = {American Astronomical Society},
  series       = {Astrophysical Journal},
  title        = {HYDRODYNAMICAL SIMULATIONS OF THE BARRED SPIRAL GALAXY NGC 1097},
  url          = {http://dx.doi.org/10.1088/0004-637X/771/1/8},
  volume       = {771},
  year         = {2013},
}