The Faint Optical Stellar Luminosity Function in the Ursa Minor Dwarf Spheroidal Galaxy
(1999) In Astrophysical Journal 516(1). p.17-20- Abstract
- Analyses of their internal stellar kinematics imply that the dwarf spheroidal (dSph) companion galaxies to the Milky Way are among the most dark matter-dominated systems known. Should there be significant dark matter in the form of faint stars in these systems, the stellar luminosity function must be very different from that of a similar metallicity globular cluster, for which there is no evidence for dark matter. We present the faint stellar luminosity function in the Ursa Minor dSph, down to a luminosity corresponding to ~0.45 M_solar, derived from new deep Hubble Space Telescope/WFPC2 data. We find a remarkable similarity between this luminosity function, and inferred initial mass function, and those of the globular cluster M92, a... (More)
- Analyses of their internal stellar kinematics imply that the dwarf spheroidal (dSph) companion galaxies to the Milky Way are among the most dark matter-dominated systems known. Should there be significant dark matter in the form of faint stars in these systems, the stellar luminosity function must be very different from that of a similar metallicity globular cluster, for which there is no evidence for dark matter. We present the faint stellar luminosity function in the Ursa Minor dSph, down to a luminosity corresponding to ~0.45 M_solar, derived from new deep Hubble Space Telescope/WFPC2 data. We find a remarkable similarity between this luminosity function, and inferred initial mass function, and those of the globular cluster M92, a cluster of similar age and metallicity to the Ursa Minor dSph. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/113715
- author
- Feltzing, Sofia LU ; Gilmore, G and Wyse, R F G
- organization
- publishing date
- 1999
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- dark mattergalaxies: individual (Ursa Minor)galaxies: kinematics and dynamicsgalaxies: stellar contentstars: luminosity function, mass function
- in
- Astrophysical Journal
- volume
- 516
- issue
- 1
- pages
- 17 - 20
- publisher
- American Astronomical Society
- external identifiers
-
- scopus:0033126004
- ISSN
- 0004-637X
- DOI
- 10.1086/311988
- language
- English
- LU publication?
- yes
- id
- 354a0b0e-e389-4de8-8d70-b35317f4f114 (old id 113715)
- date added to LUP
- 2016-04-01 17:04:00
- date last changed
- 2024-01-11 20:00:23
@article{354a0b0e-e389-4de8-8d70-b35317f4f114, abstract = {{Analyses of their internal stellar kinematics imply that the dwarf spheroidal (dSph) companion galaxies to the Milky Way are among the most dark matter-dominated systems known. Should there be significant dark matter in the form of faint stars in these systems, the stellar luminosity function must be very different from that of a similar metallicity globular cluster, for which there is no evidence for dark matter. We present the faint stellar luminosity function in the Ursa Minor dSph, down to a luminosity corresponding to ~0.45 M_solar, derived from new deep Hubble Space Telescope/WFPC2 data. We find a remarkable similarity between this luminosity function, and inferred initial mass function, and those of the globular cluster M92, a cluster of similar age and metallicity to the Ursa Minor dSph.}}, author = {{Feltzing, Sofia and Gilmore, G and Wyse, R F G}}, issn = {{0004-637X}}, keywords = {{dark mattergalaxies: individual (Ursa Minor)galaxies: kinematics and dynamicsgalaxies: stellar contentstars: luminosity function; mass function}}, language = {{eng}}, number = {{1}}, pages = {{17--20}}, publisher = {{American Astronomical Society}}, series = {{Astrophysical Journal}}, title = {{The Faint Optical Stellar Luminosity Function in the Ursa Minor Dwarf Spheroidal Galaxy}}, url = {{https://lup.lub.lu.se/search/files/4864064/623752.pdf}}, doi = {{10.1086/311988}}, volume = {{516}}, year = {{1999}}, }