Demo - Creating a Floating Navigation Menu

Ongoing Project & Research


CIBER (The Cosmic Infrared Background Experiment) is a sounding rocket payload designed to characterize the near infrared (IR) background light. CIBER is built by an international collaboration of Universities and Government Laboratories which has flown twice and, having acquired a data set which is not possible from other platforms, will soon shed new light on the nature of the Cosmos.

What is the Infrared Background?

The Extragalactic Infrared Background (EBL) is the integrated light from all of the infrared sources in the Universe. In the near IR, these photons are produced by stars are a by-product of nucleosynthesis. Measurement of the near IR EBL therefore a constrains the stellar content of the Universe.  Learn More


CANDELS is the largest project in the history of Hubble, with 902 assigned orbits of observing time. This is the equivalent of four months of Hubble time if executed consecutively, but in practice CANDELS will take three years to complete (2010-2013).

The core of CANDELS is the revolutionary near-infrared WFC3 camera, installed on Hubble in May 2009. WFC3 is sensitive to longer, redder wavelengths, which permits it to follow the stretching of lightwaves caused by the expanding Universe. This enables CANDELS to detect and measure objects much farther out in space and nearer to the Big Bang than before. CANDELS also uses the visible-light ACS camera, and together the two cameras give unprecedented panchromatic coverage of galaxies from optical wavelengths to the near-IR.

CANDELS will exploit this new lookback power to construct a "cosmic movie" of galaxy evolution that follows the life histories of galaxies from infancy to the present time. This work will cap Hubble's revolutionary series of discoveries on cosmic evolution and bequeath a legacy of precious data to future generations of astronomers.

CANDELS will also test the reality of cosmic dark energy by measuring the brightness of a special class of exploding supernovae called Type Ia. By spotting these objects out to farther distances, CANDELS will establish whether these objects are in fact precision "standard candles" for probing the geometry of spacetime.  Learn More



Our group is a founding member of the ZEBRA instrument.An instrument for astrophysical measurements related to diffuse backgrounds from 5 to 10 AU was proposed in the Astro2010 White Paper by Cooray etc.

The ZEBRA science team brings together experts from astrophysical disciplines as diverse as reionization, the star formation history of the Universe, exo-planet detection and characterization, Zodiacal dust nad outer solar system bodies, and astronomical instrumentation.

Scattered sunlight from dust in the inner solar system is bright, presenting the dominant foreground for measurements of the extragalactic background light and obscuring our view of the structure of dust in the outer solar system.

The Zodiacal sky brightness at Jupiter (5 AU) and Saturn (10 AU) is 100 - 1000 times fainter than at Earth (AU) [light blue curves]. This large reduction in the dominant foreground allows definitive measurements of the Extragalactic Background Light (EBL) [red curve].  Learn More


Recent Publications and News

Conditional Luminosity Function Model of the Cosmic Far-Infrared Background Anisotropy Power Spectrum (June 2012)

Francesco de Bernardis, Asantha Cooray

HerMES: Candidate Gravitationally Lensed Galaxies and Lensing Statistics at Submillimeter Wavelengths (May 2012)

Julie L Wardlow, Asantha Cooray, et al.

The Near-IR Background Intensity and Anisotropies During The Epoch of Reionization (May 2012)

Asantha Cooray, Yan Gong, Joseph Smidt, Mario G. Santos

Lensed galaxies in CANDELS (Oct. 2011)

Asantha Cooray, Hai Fu, et al.

The LABOCA survey of the Extended Chandra Deep Field-South: a photometric redshift survey of submillimetre galaxies (Aug. 2011)

J.L. Wardlow, Ian Smail, et al.

Future weak lensing constraints in a dark coupled universe (June 2011)

Francesco de Bernardi, Matteo Martinello, et al.

A Constraint on the Integrated Mass Power Spectrum Out to z = 1100 from Lensing of the Cosmic Microwave Background (Feb. 2011)

Joseph Smidt, Asantha Cooray, et al.

Measuring dark energy spatial inhomogeneity with supernova data (Nov. 2011)

Asantha Cooray, Daniel E. Holz, Robert Caldwell

Constraints on primordial non-Gaussianity from WMAP7 and luminous red galaxies power spectrum and forecast for future surveys (Oct. 2010)

Francesco de Bernardis, Paolo Serra, Asantha Cooray, Alessandro Melchiorri

A New Approach to Probing Minkowski Functionals. (Nov. 2010)

Dipak Munshi, Joseph Smidt, Asantha Cooray

Herschel-ATLAS: Statistical Properties of Galactic Cirrus in the GAMA-9 Hour Science Demonstration Phase Field. (Nov. 2010)

Andrea Bracco, Asantha Cooray, et al.

CMB Neutrino Mass Bounds and Reionization (Oct. 2010)

Maria Archidiacono, Asantha Cooray, Alessandro Melchiorri, Stefania Pandolfi

Our Team

Asantha R. Cooray

Professor of Physics  Department of Physics & Astronomy University of California, Irvine

CV | Cosmology

Dr. Caitlin Casey

Astronomer at the University of California, Irvine

Research | CV | Publications

Chang Feng

Postdoctoral Researcher


Hooshang Nayyeri

Postdoctoral Researcher

Research Area: Astrophysics & Cosmology

Research | CV

Ketron Mitchell - Wynne

Ph.D  in Physic 2016

Research | CV

Nicholas Timmons

Jeff Wingo

Matthew Keele

Mailani Neal

Morgane Konig

The Herschel Space Observatory's mission has been designed to unveil a face of the early Universe that has remained hidden until now. Thanks to its ability to detect radiation at far infrared and sub-millimetre wavelengths, Herschel will be able to observe dust obscured and cold objects that are invisible to other telescopes.

Herschel's major objective will be discovering how the first galaxies formed and how they evolved to give rise to present day galaxies like our own. Additional targets for Herschel will include clouds of gas and dust where new stars are being born, disks out of which planets may form and cometary atmospheres packed with complex organic molecules.  

The Herschel Space Observatory is a space-based telescope that will study the Universe by the light of the far-infrared and submillimeter portions of the spectrum.  Learn More