DWARF SPHEROIDAL GALAXIES AND THE MASS OF THE NEUTRINO

被引：37

作者：

GERHARD, OE ^{[1
]}

SPERGEL, DN ^{[1
]}

机构：

[1] PRINCETON UNIV OBSERV,PRINCETON,NJ 08544

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 389卷 / 01期

关键词：

DARK MATTER; GALAXIES; LOCAL GROUP;

D O I：

10.1086/186336

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We argue that neutrinos cannot provide the missing mass in Draco and Ursa Minor, since for reasonable neutrino mass (m(v) approximately 30 eV) phase-space limits would then require very large core radii (approximately 10 kpc) and masses (approximately 4 x 10(11) M.) for these dwarfs, which would make their dynamical friction decay times in the Galactic halo significantly shorter than a Hubble time. These limits are insensitive to assumptions about the anisotropy of the neutrino distribution.

引用

页码：L9 / L11

页数：3

共 15 条

[1] ACCURATE RADIAL-VELOCITIES FOR CARBON STARS IN DRACO AND URSA MINOR - THE 1ST HINT OF A DWARF SPHEROIDAL MASS-TO-LIGHT RATIO [J].