Galaxy formation and evolution

Lead Research Organisation: University of Cambridge
Department Name: Institute of Astronomy

Abstract

This programmatic five-year rolling grant application addresses one of the most important problems in extragalactic astronomy, the formation and evolution of galaxies, one of the ``big questions'' in the current PPARC Road Map, and is a defining objective of virtually every national decadal survey of astronomy. A full understanding of galaxy formation and evolution requires multiple lines of attack. Observations of the resolved stellar populations in the Milky Way and its Local Group companions provide a detailed fossil record of the dynamical assemblies of the galaxies, the formation of stars, and the buildup of heavy elements over a wide range of mass scales and initial conditions. At the other end of the scale, observations of distant galaxies spanning lookback times of up to 12 Gyr provide direct measurements of the evolution of galaxy populations and the buildup of stars and metals with cosmic time. Finally, measurements of the large-scale star formation and abundance properties of nearby galaxies form a vital astrophysical bridge between the studies of nearby resolved stellar populations and the distant high-redshift investigations, by allowing us to characterise the evolutionary properties of the Hubble sequence and the complex ``gastrophysical'' processes that regulate the accretion of gas and the formation of stars in galaxies. In this rolling grant application we propose a series of investigations that will advance our understanding of galaxy formation and evolution on all three fronts.

Publications

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Pinfield D (2008) Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey in Monthly Notices of the Royal Astronomical Society

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Pontzen A (2009) Dust biasing of damped Lyman alpha systems: a Bayesian analysis in Monthly Notices of the Royal Astronomical Society

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Pontzen A (2010) The nature of H i absorbers in gamma-ray burst afterglows: clues from hydrodynamic simulations in Monthly Notices of the Royal Astronomical Society

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Pontzen A (2008) Damped Lyman a systems in galaxy formation simulations in Monthly Notices of the Royal Astronomical Society

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Pontzen A (2007) Direct observational test rules out small Mg ii absorbers in Monthly Notices of the Royal Astronomical Society: Letters

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Quinn D (2009) A strip search for new very wide halo binaries A strip search for new very wide halo binaries in Monthly Notices of the Royal Astronomical Society

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Richardson J (2009) An HST /ACS view of the inhomogeneous outer halo of M31 in Monthly Notices of the Royal Astronomical Society

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Ryan-Weber E (2008) The Local Group dwarf Leo T: H i on the brink of star formation H i in Leo T in Monthly Notices of the Royal Astronomical Society

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Ryan-Weber E (2009) A downturn in intergalactic C iv as redshift 6 is approached in Monthly Notices of the Royal Astronomical Society

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Seabroke G (2007) Revisiting the relations: Galactic thin disc age-velocity dispersion relation in Monthly Notices of the Royal Astronomical Society

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Seabroke G (2008) Is the sky falling? Searching for stellar streams in the local Milky Way disc in the CORAVEL and RAVE surveys in Monthly Notices of the Royal Astronomical Society

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Sen B (2009) Streaming motion in Leo I in The Annals of Applied Statistics

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Shin E (2008) Lensing by binary galaxies modelled as isothermal spheres in Monthly Notices of the Royal Astronomical Society

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Shin E (2008) The effect of satellite galaxies on gravitational lensing flux ratios in Monthly Notices of the Royal Astronomical Society

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Siebert A (2008) Estimation of the tilt of the stellar velocity ellipsoid from RAVE and implications for mass models in Monthly Notices of the Royal Astronomical Society

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Smith M (2007) Blending in gravitational microlensing experiments: source confusion and related systematics in Monthly Notices of the Royal Astronomical Society

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Smith M (2009) Kinematics of SDSS subdwarfs: structure and substructure of the Milky Way halo in Monthly Notices of the Royal Astronomical Society

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Smith M (2007) The RAVE survey: constraining the local Galactic escape speed in Monthly Notices of the Royal Astronomical Society