The response of a spheroid to a disc field or were bulges ever ellipticals?
Abstract
A collisionless N-body code is used to study the response of a proto-bulge to the field of an exponential disc. In the limit where the time-scale of the disc's growth is long compared to the dynamical time-scale of the bulge, the final state of the bulge will depend on the final state of the disc, but not on the details of how the disc matter was assembled. The disc field acts to increase the surface brightness, velocity dispersion, rotation velocity and flattening of the bulge, but does not (directly) account for either the ‘thick disc’ or ‘box-shaped’ bulge phenomena. Our results suggest that the close similarity between bulges and ellipticals cannot result from disc accretion on to a pre-existing normal elliptical unless discs are considerably less massive than is currently believed.
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For MW and higher mass haloes, the effect of baryons on the DM halo is well described by the adiabatic contraction model, in which baryons slowly accumulate at the halo centre and the DM distribution distorts such that its action integrals remain approximately constant.
“For MW and higher mass haloes, the effect of baryons on the DM halo is well described by the adiabatic contraction model (Callingham et al. 2020), in which baryons slowly accumulate at the halo centre and the DM distribution distorts in such a way that its action integrals remain approximately constant”
From The milky way total mass profile as inferred from Gaia DR2 (2020) · cites this paper as Barnes & White 1984
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The 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 · see citing works
Self-citationCole, S., Lacey, C. G., Baugh, C. M., & Frenk, C. S. (2002) · Monthly Notices of the Royal Astronomical Society · doi:10.1046/j.1365-8711.2000.03879.x · Cited by 1,952 · see citing works
Gnedin, O. Y., Kravtsov, A. V., Klypin, A. A., & Nagai, D. (2004) · The Astrophysical Journal · doi:10.1086/424914 · Cited by 945 · see citing works
The milky way total mass profile as inferred from Gaia DR2
Cautun, M., Benítez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2020) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staa1017 · Cited by 332 · see citing works
“…is well described by the adiabatic contraction model (Callingham et al. 2019a), in which baryons slowly accumulate at the halo centre and the DM distribution distorts in such a way that its action integrals remain approximately constant (Barnes & White 1984; Blumenthal et al. 1986; Barnes 1987).”
BackgroundThe Milky Way total mass profile as inferred from Gaia DR2
Cautun, M., Benitez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2019) · arXiv · doi:10.48550/arxiv.1911.04557 · Cited by 335
Galaxy-induced transformation of dark matter haloes: Transformations of CDM haloes
Abadi, M. G., Navarro, J. F., Fardal, M., Babul, A., & Steinmetz, M. (2010) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2010.16912.x · Cited by 237 · see citing works
The Compression of Dark Matter Halos by Baryonic Infall
Sellwood, J. A., & McGaugh, S. S. (2005) · The Astrophysical Journal · doi:10.1086/491731 · Cited by 164 · see citing works
Halo Response to Galaxy Formation
Barnes, J. E. (1987) · Nearly Normal Galaxies · doi:10.1007/978-1-4612-4762-3_20 · Cited by 22 · see citing works
Self-citation
- Authors
- Barnes, J., & White, S. D. M.
- Affiliations
- University of California, Berkeley (US)
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 1984-12-01
- Volume
- 211
- Issue
- 4
- Pages
- 753-765
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2011373337
- Cited by
- 98
- References
- 0
- Citations by year
- 2025: 3 · 2023: 1 · 2022: 5 · 2021: 2 · 2020: 5 · 2019: 3 · 2016: 5 · 2015: 3 · 2013: 2 · 2012: 3
- FWCI
- 1.94
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Monthly Notices of the Royal Astronomical Society (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Keywords
- Galactic bulge, elliptical galaxies, disk accretion, exponential disc, surface brightness, velocity dispersion, thick disk, galaxy evolution
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