The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.
Formation of a Spiral Galaxy in a Major Merger
Open accessAbstract
We use numerical simulations to examine the structure of merger remnants resulting from collisions of gas-rich spiral galaxies. When the gas fraction of the progenitors is small, the remnants structurally and kinematically resemble elliptical galaxies, in agreement with earlier work. However, if the progenitor disks are gas-dominated, new types of outcomes are possible, where a prominent disk may survive in certain cases. To illustrate this scenario, we analyze an extreme example with progenitor galaxies consisting of dark matter halos, pure gas disks, and no bulges, as might be appropriate for mergers at high redshifts. While rapid star formation triggered by tidal torques during the merger forms a central, rotating bulge in the remnant, not all the gas is consumed in the burst. The remaining gas cools quickly and settles into an extended star-forming disk, yielding an object similar to a spiral galaxy and not an early-type galaxy. This is contrary to the usual view that major mergers invariably destroy disks. The morphological evolution of galaxies can therefore be more complicated than often assumed, and in particular, theoretical constraints based on the fragility of spiral disks need to be reevaluated.
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Citations
Cites
The Structure of Cold Dark Matter Halos
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“The dark matter follows a Hernquist (1990) profile, scaled to match the inner density distribution of halos found in cosmological simulations (Navarro et al. 1996).”
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An analytical model for spherical galaxies and bulges
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Self-citationToomre, A., & Toomre, J. (1972) · The Astrophysical Journal · doi:10.1086/151823 · Cited by 2,555
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Self-citationUltraluminous infrared galaxies and the origin of quasars
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Gasdynamics and Starbursts in Major Mergers
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Self-citationGADGET: a code for collisionless and gasdynamical cosmological simulations
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Self-citationTransformations of Galaxies. II. Gasdynamics in Merging Disk Galaxies
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Self-citation
Cited by
Energy input from quasars regulates the growth and activity of black holes and their host galaxies
Di Matteo, T., Springel, V., & Hernquist, L. (2005) · Nature · doi:10.1038/nature03335 · Cited by 3,353
Self-citationHopkins, P. F., Hernquist, L., Cox, T. J., Di Matteo, T., Robertson, B., & Springel, V. (2006) · The Astrophysical Journal Supplement Series · doi:10.1086/499298 · Cited by 1,873
Self-citationDusty star-forming galaxies at high redshift
Casey, C. M., Narayanan, D., & Cooray, A. (2014) · Physics Reports · doi:10.1016/j.physrep.2014.02.009 · Cited by 800
Emsellem, E., Cappellari, M., Krajnović, D., Alatalo, K., Blitz, L., Bois, M., Bournaud, F., Bureau, M., Davies, R. L., Davis, T. A., et al. (2011) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2011.18496.x · Cited by 756
Theoretical Challenges in Galaxy Formation
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Metadata
- Authors
- Springel, V., & Hernquist, L.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2005-02-16
- Volume
- 622
- Issue
- 1
- Pages
- L9-L12
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2086949239
- Cited by
- 443
- References
- 32
- FWCI
- 19.52
- Type
- journal article
- Language
- en
- Open access
- bronze
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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