The DOI matches its Crossref record; 88 of the 88 references it cites were found in a registry or an index.
The Tidal Evolution of Local Group Dwarf Spheroidals
Open accessAbstract
We use N -body simulations to study the evolution of dwarf spheroidal galaxies (dSphs) driven by galactic tides. We adopt a cosmologically motivated model where dSphs are approximated by a King model embedded within an NFW halo. We find that these NFW-embedded King models are extraordinarily resilient to tides; the stellar density profile still resembles a King model even after losing more than 99% of the stars. As tides strip the galaxy, the stellar luminosity, velocity dispersion, central surface brightness, and core radius decrease monotonically. Remarkably, we find that the evolution of these parameters is solely controlled by the total amount of mass lost from within the luminous radius. Of all parameters, the core radius is the least affected: after losing 99% of the stars, R c decreases by just a factor of ~2. Interestingly, tides tend to make dSphs more dark matter-dominated because the tightly bound central dark matter "cusp" is more resilient to disruption than the "cored" King profile. We examine whether the extremely large mass-to-light ratios of the newly discovered ultrafaint dSphs might have been caused by tidal stripping of once-brighter systems. Although dSph tidal evolutionary tracks parallel the observed scaling relations in the luminosity-radius plane, they predict too steep a change in velocity dispersion compared with the observational estimates hitherto reported in the literature. The ultrafaint dwarfs are thus unlikely to be the tidal remnants of systems like Fornax, Draco, or Sagittarius. Despite spanning four decades in luminosity, dSphs appear to inhabit halos of comparable peak circular velocity, lending support to scenarios that envision dSphs as able to form only in halos above a certain mass threshold.
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Citations
Cites
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Self-citationThe Structure of Cold Dark Matter Halos
Navarro, J. F., Frenk, C. S., & White, S. D. M. (1996) · The Astrophysical Journal · doi:10.1086/177173 · Cited by 8,544
Self-citationThree‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Implications for Cosmology
Spergel, D. N., Bean, R., Dore, O., Nolta, M. R., Bennett, C. L., Dunkley, J., Hinshaw, G., Jarosik, N., Komatsu, E., Page, L., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/513700 · Cited by 6,778
A Universal Density Profile from Hierarchical ClusteringPreprint
Navarro, J. F., Frenk, C. S., & White, S. D. M. (1996) · Cited by 6,275
Self-citationDark Matter Substructure within Galactic Halos
Moore, B., Ghigna, S., Governato, F., Lake, G., Quinn, T., Stadel, J., & Tozzi, P. (1999) · The Astrophysical Journal · doi:10.1086/312287 · Cited by 3,021
Where Are the Missing Galactic Satellites?
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DWARF GALAXIES OF THE LOCAL GROUP
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The structure of star clusters. I. an empirical density law
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Cited by
Galactic stellar haloes in the CDM model
Cooper, A. P., Cole, S., Frenk, C. S., White, S. D. M., Helly, J., Benson, A. J., De Lucia, G., Helmi, A., Jenkins, A., Navarro, J. F., et al. (2010) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2010.16740.x · Cited by 594
Self-citationTHE SAGITTARIUS DWARF GALAXY: A MODEL FOR EVOLUTION IN A TRIAXIAL MILKY WAY HALO
Law, D. R., & Majewski, S. R. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/714/1/229 · Cited by 550
Weisz, D. R., Dolphin, A. E., Skillman, E. D., Holtzman, J., Gilbert, K. M., Dalcanton, J. J., & Williams, B. F. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/789/2/147 · Cited by 499
Fritz, T. K., Battaglia, G., Pawlowski, M. S., Kallivayalil, N., van der Marel, R., Sohn, S. T., Brook, C., & Besla, G. (2018) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833343 · Cited by 269
The missing massive satellites of the Milky Way
Wang, J., Frenk, C. S., Navarro, J. F., Gao, L., & Sawala, T. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.21357.x · Cited by 185
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Metadata
- Authors
- Penarrubia, J., Navarro, J. F., & McConnachie, A. W.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2008-01-20
- Volume
- 673
- Issue
- 1
- Pages
- 226-240
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2055843263
- Cited by
- 406
- References
- 88
- FWCI
- 20.44
- Type
- journal article
- Language
- en
- Open access
- bronze
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