Professor Cedric Lacey's Outputs (192)

The diffusion of stars through phase space (1988)
Journal Article
Binney, J., & Lacey, C. (1988). The diffusion of stars through phase space. Monthly Notices of the Royal Astronomical Society, 230(4), 597-627. https://doi.org/10.1093/mnras/230.4.597

Deviations of the potentials of stellar systems from integrability cause stars to diffuse through three-dimensional orbit space. The Fokker–Planck equation that describes this diffusion takes a particularly simple form when actions are used as orbit-... Read More about The diffusion of stars through phase space.

Dark clusters in galactic halos? (1987)
Journal Article
Carr, B., & Lacey, C. (1987). Dark clusters in galactic halos?. Astrophysical Journal, 316, 23-35. https://doi.org/10.1086/165176

It is proposed that the invisible mass in galactic halos may consist of one million solar masses dark clusters. Such clusters would be able to heat the stellar disks in galaxies, just as in the Lacey and Ostriker (1985) supermassive black hole scenar... Read More about Dark clusters in galactic halos?.

Massive black holes in galactic halos? (1985)
Journal Article
Lacey, C., & Ostriker, J. (1985). Massive black holes in galactic halos?. Astrophysical Journal, 299, 633-652. https://doi.org/10.1086/163729

The authors consider the idea that galaxy halos are composed of massive black holes as a possible resolution of two problems: the composition of dark halos, and the heating of stellar disks. It is found that in order to account for the amount of disk... Read More about Massive black holes in galactic halos?.

Chemical evolution of the galactic disk with radial gas flows (1985)
Journal Article
Lacey, C., & Fall, S. (1985). Chemical evolution of the galactic disk with radial gas flows. Astrophysical Journal, 290, 154-170. https://doi.org/10.1086/162970

Models are presented for the chemical evolution of the galactic disc with radial inflows of the gas at a velocity constant with time, but that may vary with the galactocentric radius. The models include the infall of metal-free gas from outside the d... Read More about Chemical evolution of the galactic disk with radial gas flows.

The influence of massive gas clouds on stellar velocity dispersions in galactic discs (1984)
Journal Article
Lacey, C. (1984). The influence of massive gas clouds on stellar velocity dispersions in galactic discs. Monthly Notices of the Royal Astronomical Society, 208(4), 687-707. https://doi.org/10.1093/mnras/208.4.687

This paper calculates the evolution of the three components of the velocity dispersion of the stars in a galactic disc due to the influence of massive gas clouds in circular orbits in the disc. We find that there are two phases in this evolution: an... Read More about The influence of massive gas clouds on stellar velocity dispersions in galactic discs.

Kinematical and chemical evolution of the galactic disc (1983)
Journal Article
Lacey, C., & Fall, S. (1983). Kinematical and chemical evolution of the galactic disc. Monthly Notices of the Royal Astronomical Society, 204(3), 791-810. https://doi.org/10.1093/mnras/204.3.791

In the models presented here, metal-free gas accumulates in the galactic disc at a rate that decays exponentially on a time-scale tf. Stars then form with a constant initial mass function and a small velocity dispersion at a rate proportional to the... Read More about Kinematical and chemical evolution of the galactic disc.

The evolution of disc galaxies
Presentation / Conference Contribution
Cole, S. M., Baugh, C., Frenk, C., Lacey, C., & Benson, A. (2000, July). The evolution of disc galaxies. Presented at Discussion Meeting on ‘The formation of galaxies’, Durham

We briefly describe the physical processes that are included in our semi–analytic model of hierarchical galaxy formation. We review some of the low redshift properties of one such model constructed assuming a ∧CDM cosmology. We examine the evolutiona... Read More about The evolution of disc galaxies.

The Disk Heating Problem
Presentation / Conference Contribution
Lacey, C. (1991, December). The Disk Heating Problem

Galaxy Formation at High Redshifts: the View from the NGST.
Presentation / Conference Contribution
Benson, A., Frenk, C. S., Baugh, C. M., Cole, S., & Lacey, C. G. (2001, December). Galaxy Formation at High Redshifts: the View from the NGST. Presented at The New Era of Wide Field Astronomy

A Multi-Wavelength Model of Galaxy Formation
Presentation / Conference Contribution
Lacey, C. (2006, January). A Multi-Wavelength Model of Galaxy Formation. Presented at The Fabulous Destiny of Galaxies: Bridging Past and Present

The Nature of (Sub)millimeter Galaxies in Hierarchical Models
Presentation / Conference Contribution
Baugh, C. M., Lacey, C. G., Frenk, C. S., Granato, G. L., Silva, L., Bressan, A., Benson, A. J., & Cole, S. (2007, October). The Nature of (Sub)millimeter Galaxies in Hierarchical Models. Presented at From Z-Machines to ALMA: (Sub)Millimeter Spectroscopy of Galaxies

The metal enrichment of galaxies and galaxy clusters in the cold dark matter universe
Presentation / Conference Contribution
Nagashima, M., Lacey, C. G., Okamoto, T., Baugh, C. M., Frenk, C. S., & Cole, S. (2006, July). The metal enrichment of galaxies and galaxy clusters in the cold dark matter universe. Presented at Origin of Matter and Evolution of Galaxies