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K giants and the total amount of matter near the sun
Abstract
The Poisson and Boltzmann equations are solved numerically for realistic Galaxy models which include multiple disk components (between 14 and 28), a Population II spheroid, and an unseen massive halo. As a guide in constructing the theoretical models, a population of normal-metallicity (disk) K giants is isolated using existing data and is shown to be well described by an isothermal distribution function with a velocity dispersion perpendicular to the plane of 20 km s-1. The total amount of matter in the vicinity of the Sun is determined by comparing the observed distributions of K giants with the predictions of detailed Galaxy models. The volume density of unobserved material near the Sun is about 0.1 M_sun; pc-3; the corresponding column density is about 30 M_sun; pc-2.
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Citations
Cited by
The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems
Kroupa, P. (2002) · Science · doi:10.1126/science.1067524 · Cited by 1,793
Bertone, G., & Hooper, D. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.045002 · Cited by 1,241
Griest, K., & Kamionkowski, M. (2000) · Physics Reports · doi:10.1016/s0370-1573(00)00021-1 · Cited by 1,076
LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) — The survey's science plan
Deng, L.-C., Newberg, H. J., Liu, C., Carlin, J. L., Beers, T. C., Chen, L., Chen, Y.-Q., Christlieb, N., Grillmair, C. J., Guhathakurta, P., et al. (2012) · Research in Astronomy and Astrophysics · doi:10.1088/1674-4527/12/7/003 · Cited by 554
Read, J. I. (2014) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/41/6/063101 · Cited by 489
Metadata
- Authors
- Bahcall, J. N.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1984-12
- Volume
- 287
- Pages
- 926
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2091570817
- Cited by
- 160
- References
- 0
- FWCI
- 18.25
- Type
- journal article
- Language
- en
- Open access
- closed
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