cjo25
Summary and figures of the currently available experimental data on CMB temperature anisotropies. A couple of packages for download, including a C version of the WMAP likelihood code.
NEWS
previous news
- 10.07.03: I am now in Switzerland. News and features on this page.
- 01.07.03: New 'Talks and posters' page here with abstracts and downloads of slides and posters in PDF format.
- 01.07.03: I have come back from Wales and I have put the slides of my seminar here. I am on my way to Switzeland to write up and any other plans can be found here.
- 28.05.03: Less cluttered navigation. Publications now available here. Also, I have added an online research proposal here.
- 16.05.03: Another update, another design :). I have now written my WMAP page with a C version of the likelihood code for download and some recent results.
List of publications with abstracts and links.
List of talks an posters with abstracts and downloads.
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Joint constraints from the Cosmic Microwave Background and other cosmological datasets
suprevisor: Prof. Anthony N. Lasenby
Description of the PhD project as advertised in 2000:
The Cosmic Microwave background will provide information of greatly improving accuracy over the next few years. This will allow many checks of cosmological models to be carried out, and estimates to be made of fundamental cosmological parameters. However, use of CMB information alone is in general not sufficient to break degeneracies between some of the cosmological parameters, and in any case, to check thoroughly the assumptions and modelling involved in parameter estimation, one needs to compare predictions across as many data sets as possible. We have already begun a programme here of combining CMB data with a growing list of other cosmological indicators. This includes cluster abundances, type Ia supernovae, redshift surveys of IRAS galaxies and peculiar velocity information. The aim of the proposed project would be to extend this work to the new generation of CMB and large scale structure data. On the CMB side, this will include use of VSA, Boomerang and other recent data, and on the large scale structure side we would like to incorporate data from the new very large redshift surveys, 2dF and Sloan, as they become available. This will involve extending our existing analysis techniques to simultaneous likelihood estimation covering large datasets. It will also require extending the theoretical underpinnings to cover a wider range of joint parameter space (e.g. tensor components and non-flat models), as well as consider issues such as variable bias, as revealed in the latest N-body simulations.
This project is part of the Leverhulme collaboration for Quantitative Cosmology.
Previous projects:
The shape of the CMB:
first results : Phys. Rev. D67 083511 - Collaboration with Alessandro Melchiorri Anthony Lasenby andn Mike Hobson
VSA analysis : MNRAS, 341, 4, 1084 - MNRAS, 341, 4, L23 - for the VSA team at MRAO
Poster presented at Joe Silk's birthday conference, Oxford, December 2002
post-WMAP results : Proceedings of the 2nd CMBNet Meeting, Oxford, Feb 2003
Gravitational Waves:
Phys. Rev. D 67, 021501(R) - Collaboration with Alessandro Melchiorri when the Archeops CMB observations became available.
Dark Energy:
Seminar given at the University of Wales, Swansea, June 2003
Talk given at the Royal Astronomical Society, London, March 2003
astro-ph/0211522 (PRD, submitted ) - collaboration with Alessandro Melchiorri, Laura Mersini and Mark Trodden
Proceedings of the XVIII IAP Colloquium "On the nature of dark energy" Paris, July 2002 - collaboration with Alessandro Melchiorri
Image based on a Monte Carlo Markov chain cosmological parameter estimation using CMB anisotropy data. The background is a nearby star forming nebula.
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