천문학회지 (Journal of The Korean Astronomical Society)

  • 제35권2호
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  • Pages.75-85
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  • 2002
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  • 1225-4614(pISSN)
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  • 2288-890X(eISSN)
한국천문학회 (The Korean Astronomical Society)
권호 표지
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TIDAL TAILS OF GLOBULAR CLUSTERS

  • YIM KI-JEONG (Astronomy Program, SEES, Seoul National University) ;
  • LEE HYUNG MOK (Astronomy Program, SEES, Seoul National University)
  • 발행 : 2002.06.01
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초록

We present N-body simulations of globular clusters including gravitational field of the Galaxy, in order to study effects of tidal field systematically on the shape of outer parts of globular clusters using NBODY6. The Galaxy is assumed to be composed of central bulge and outer halo. We mvestigate the cluster of multi-mass models with a power-law initial mass function (IMF) starting with different initial masses, initial number of particles, different slopes of the IMF and different orbits of the cluster. We have examined the general evolution of the clusters, the shape of outer parts of the clusters, density profiles and the direction of tidal tails. The density profiles appear to become somewhat shallower just outside the tidal boundary consistent with some observed data. The position angle of the tidal tall depends on the location in the Galaxy as well as the direction of the motion of. clusters. We found that the clusters become more elongated at the apogalacticon than at the pengalacticon. The tidal tails may be used to trace the orbital paths of globular clusters.

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참고문헌

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피인용 문헌

  1. Unravelling the escape dynamics and the nature of the normally hyperbolic invariant manifolds in tidally limited star clusters vol.465, pp.1, 2017, https://doi.org/10.1093/mnras/stw2517
  2. Tidal Tails around Globular Clusters: Are They a Good Tracer of Cluster Orbits? vol.659, pp.2, 2007, https://doi.org/10.1086/512114
  3. The evolution of two stellar populations in globular clusters vol.492, pp.1, 2008, https://doi.org/10.1051/0004-6361:200810275
  4. A WIDE-FIELD PHOTOMETRIC SURVEY FOR EXTRATIDAL TAILS AROUND FIVE METAL-POOR GLOBULAR CLUSTERS IN THE GALACTIC HALO vol.139, pp.2, 2010, https://doi.org/10.1088/0004-6256/139/2/606
  5. Mass-Loss Timescale of Star Clusters in an External Tidal Field. II. Effect of Mass Profile of Parent Galaxy vol.62, pp.5, 2010, https://doi.org/10.1093/pasj/62.5.1215
  6. Effects of external tidal field on the evolution of the outer regions of multi-mass star clusters vol.367, pp.2, 2006, https://doi.org/10.1111/j.1365-2966.2006.09972.x
  7. Clumpy Substructures in Globular Cluster Tidal Tails vol.91, pp.1-2, 2005, https://doi.org/10.1007/s10569-005-3221-y
  8. Wide-Field CCD Photometry of the Globular Cluster M92 vol.126, pp.2, 2003, https://doi.org/10.1086/376738
  9. Wide-Field Stellar Distributions around the Remote Young Galactic Globular Clusters Palomar 3 and Palomar 4 vol.126, pp.2, 2003, https://doi.org/10.1086/375907