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Some implications of nonluminous matter in dwarf spheroidal galaxies
Abstract
Strong constraints are placed on the nature of nonluminous matter if it dominates the gravitational potential of dwarf spheroidal galaxies. In particular, the phase-space constraint in small galaxies sets a lower limit of several hundred eV on particle mass if the dark matter consists of noninteracting fermions. This limit is sufficiently strong to rule out neutrinos. Difficulties of a fundamental nature are also encountered even with more massive noninteracting particles. In scenarios where black holes comprise the nonluminous matter, they have to be less massive than approximately 100 solar masses. The quasi-exponential light profiles and dark matter in dwarf spheroidal galaxies may indicate a possible evolutionary link to dwarf irregular galaxies. Evidence is presented which supports the view that dwarf spheroidal galaxies are former dwarf irregular galaxies which lost their gas near the Milky Way via ram pressure sweeping.
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Citations
Cited by
DWARF GALAXIES OF THE LOCAL GROUP
Mateo, M. (1998) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.36.1.435 · Cited by 2,362
Star-Formation Histories, Abundances, and Kinematics of Dwarf Galaxies in the Local Group
Tolstoy, E., Hill, V., & Tosi, M. (2009) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082708-101650 · Cited by 1,179
Structure and Formation of Elliptical and Spheroidal Galaxies
Bender, R. (2016) · doi:10.15781/t28g8fm0v · Cited by 555
Ferguson, H. C., & Binggeli, B. (1994) · The Astronomy and Astrophysics Review · doi:10.1007/bf01208252 · Cited by 317
Metadata
- Authors
- Lin, D. N. C., & Faber, S. M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1983-03
- Volume
- 266
- Pages
- L21
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1977337180
- Cited by
- 241
- References
- 0
- FWCI
- 18.96
- Type
- journal article
- Language
- en
- Open access
- closed
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- Lin, D. N. C., & Faber, S. M. (1983). Some implications of nonluminous matter in dwarf spheroidal galaxies. The Astrophysical Journal. https://doi.org/10.1086/183971
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