The Faint Optical Stellar Luminosity Function in the Ursa Minor Dwarf Spheroidal Galaxy
Feltzing, Sofia LU
; Gilmore, G
and Wyse, R F G
(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
- 2025-10-14 10:56:43
@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}},
}