Andrew R. Liddle (born 9 June 1965) is Professor of

astrophysics Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline said, Astrophysics "seeks to ascertain the nature of the he ...

at the

Royal Observatory Edinburgh The Royal Observatory, Edinburgh (ROE) is an astronomical institution located on Blackford Hill in Edinburgh. The site is owned by the Science and Technology Facilities Council (STFC). The ROE comprises the UK Astronomy Technology Centre (UK&nbs ...

. Publications include books and over 260 papers. He is a theoretical cosmologist and is interested in understanding the properties of the

Universe The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. The Big Bang theory is the prevailing cosmological description of the development of the universe. A ...

and how these relate to fundamental physical laws.

Research

Liddle's research is on various aspects of

cosmology Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe. The term ''cosmology'' was first used in English in 1656 in Thomas Blount's ''Glossographia'', and in 1731 taken up in Latin by German philosophe ...

and astrophysics, and in particular he is interested in the origin and evolution of structure in the Universe, with special focus on models and observational constraints on the

inflationary cosmology In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch lasted from seconds after the conjectured Big Bang singulari ...

, physics of the

cosmic microwave background In Big Bang cosmology the cosmic microwave background (CMB, CMBR) is electromagnetic radiation that is a remnant from an early stage of the universe, also known as "relic radiation". The CMB is faint cosmic background radiation filling all spac ...

and the use of

galaxy clusters A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 1014 to 1015 solar masses. They are the second-la ...

as cosmological probes. His areas of research include: * The origin and evolution of structure in the Universe * Models of and observational constraints on the inflationary cosmology * Physics of the cosmic microwave background *

Dark energy In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. The first observational evidence for its existence came from measurements of supernovas, which showed that the unive ...

in the Universe. He is involved in several international projects, including the

Planck satellite ''Planck'' was a space observatory operated by the European Space Agency (ESA) from 2009 to 2013, which mapped the anisotropies of the cosmic microwave background (CMB) at microwave and infrared frequencies, with high sensitivity and small ang ...

, the

Dark Energy Survey The Dark Energy Survey (DES) is an astronomical survey designed to constrain the properties of dark energy. It uses images taken in the near-ultraviolet, visible, and near-infrared to measure the expansion of the universe using Type Ia supernova ...

and the

XMM Cluster Survey The XMM Cluster Survey (XCS) is a serendipitous X-ray galaxy cluster survey being conducted using archival data taken by ESA’s XMM-Newton satellite. Galaxy clusters trace the large scale structure of the universe, and their number density evolutio ...

. Before his position at the

he was a professor of

University of Sussex , mottoeng = Be Still and Know , established = , type = Public research university , endowment = £14.4 million (2020) , budget = £319.6 million (2019–20) , chancellor = Sanjeev Bhaskar , vice_chancellor = Sasha Roseneil , ...

in Brighton.

Publications

* ''An Introduction to Modern Cosmology'', 2nd edition (pbk), 0-470-84834-0 (hbk), * ''Cosmological Inflation and Large Scale Structure'', (pbk), 0-521-66022-X (hbk), * ''The Oxford Companion to Cosmology'', (pbk), * ''The Primordial Density Perturbation'', (pbk), 978-0-521-82849-9 (hbk), * ''Bayesian Methods in Cosmology'', (hbk).

Awards and honors

In 2015, Liddle was elected a Fellow of the

Royal Society of Edinburgh The Royal Society of Edinburgh is Scotland's national academy of science and letters. It is a registered charity that operates on a wholly independent and non-partisan basis and provides public benefit throughout Scotland. It was established i ...

References

External links

Liddle's personal web page

Liddle's articles on arXiv

Liddle's theme tree on arxiv.org

Liddle's papers relevant to high energy physics
1965 births Living people British physicists 21st-century British astronomers {{UK-astronomer-stub