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* Home * For the Public * For Astronomers * For Reviewers * Publications * News * The Team * Internal * ABOUT US The Cosmic Evolution Survey (COSMOS) is an astronomical survey designed to probe the formation and evolution of galaxies as a function of both cosmic time (redshift) and the local galaxy environment. The survey covers a 2 square degree equatorial field with spectroscopy and X-ray to radio imaging by most of the major space-based telescopes and a number of large ground based telescopes. Over 2 million galaxies are detected, spanning 75% of the age of the Universe. COSMOS is led by Caitlin Casey, Jeyhan Kartaltepe, and Vernesa Smolcic and involves more than 200 scientists in a dozen countries. More information on the COSMOS team members can be found here. Any questions? - Contact us using this form. Stay up-to-date! - Like us on Facebook, follow us on Twitter, or subscribe to our Youtube channel. -------------------------------------------------------------------------------- SPOTLIGHT NICK SCOVILLE ELECTED TO NATIONAL ACADEMY OF SCIENCES May 9, 2022 Nick Scoville, the Francis L. Moseley Professor of Astronomy at Caltech (Emeritus), was recently elected to the National Academy of Sciences in recognition of his distinguished and continuing achievements in original research! Nick is the PI of the original COSMOS HST/ACS observations. Congratulations! Full article NEW COSMOS CATALOG IS OUT! December 20, 2021 The new COSMOS catalog is out and its accompanying paper is accepted! The catalog contains 1 million sources measured in more than 30 photometric bands from the UV to the infrared. For the extraction of the photometry, our international team applied a new prior-based method to go even deeper and to obtain more robust measurements for blended sources. The catalog also contains photometric redshifts and other physical properties of the galaxies measured from their photometry using spectral energy distribition (SED) fitting codes like LePhare and Eazy. This catalog is a major milestone for COSMOS, combining its multi-wavelength data consistently, and opening up new avenues to explore galaxy evolution. You can download the catalog at https://cosmos2020.calet.org to use it for your own science! Full article For the extraction of the photometry of the galaxies, a new prior-based method is used to go even deeper and to obtain more robust measurements for blended sources. Credit: J. Weaver et al. (2021). EXTENDED RADIO AGN AND HOW THEY BEND IT October 8, 2021 A team of COSMOS researchers studied jets escaping active galactic nuclei (AGN) to investigate what causes their bending. For this, they used radio data from the VLA and X-ray observations from Chandra/XMM-Newton to measure the "bent angle", i.e., the angle the jets form to each other in a two-sided source. The angle is related to the environment in which the AGN hosts reside and compared to magnetohydrodynamic simulations. It is found that the evolution of the environment surrounding the sources affects their radio structures and allows for more space for jet interactions. Full article COSMOS-WEBB SELECTED AS JWST’S LARGEST CYCLE 1 PROGRAM April 19, 2021 When the James Webb Space Telescope (JWST)—the long-awaited successor to the Hubble Space Telescope—becomes operational in 2022, one of its first orders of business will be mapping the earliest structures of the universe. A team of nearly 50 researchers led by scientists at Rochester Institute of Technology and University of Texas at Austin will attempt to do so through the COSMOS-Webb program, the largest General Observer program selected for JWST’s first year. Over the course of 208.6 observing hours, the COSMOS-Webb program will conduct an ambitious survey of half a million galaxies with multi-band, high-resolution near infrared imaging and an unprecedented 32,000 galaxies in mid infrared. The scientists involved said that because COSMOS-Webb is a treasury program, they will rapidly release data to the public so it can lead to countless other studies by other researchers. Full article The COSMOS-Webb survey will map 0.6 square degrees of the sky—about the area of three full moons—using JWST’s Near Infrared Camera (NIRCam) instrument while simultaneously mapping a smaller 0.2 square degrees with the Mid Infrared Instrument (MIRI). Credit: J. Kartaltepe/RIT; C. Casey/UT Austin; A. Koekemoer/STScI NEWS * Nick Scoville receives the 2021 Henry Norris Russell Lectureship Prize January 13, 2021 * Snakes and Butterflies October 3, 2020 * Relating mass and star formation rates September 27, 2020 * COSMOS X-ray galaxy groups catalog release August 30, 2019 * New COSMOS Publication on Brightest Cluster Galaxy Progenitors July 12, 2019 RECENT PUBLICATIONS * Identifying and Repairing Catastrophic Errors in Galaxy Properties Using Dimensionality Reduction * Bridging between the integrated and resolved main sequence of star formation * Automated Mining of the ALMA Archive in the COSMOS Field (A³COSMOS). I. Robust ALMA Continuum Photometry Catalogs and Stellar Mass and Star Formation Properties for ∼700 Galaxies at z = 0.5–6 * Spectroscopic surveys of cosmic evolution * Stellar Mass Growth of Brightest Cluster Galaxy Progenitors in COSMOS Since z ∼ 3 TWEETS COSMOS Survey @cosmosastro July 15, 2022 It's the end of another great COSMOS meeting! @hjmccracken did a fantastic job hosting us at the @astroIAP and he e… https://t.co/yUV5dY7oua COSMOS Survey @cosmosastro July 13, 2022 Tune in to PBS NOVA tonight to learn more about JWST! https://t.co/bIUCYnMPS2 COSMOS Survey @cosmosastro July 13, 2022 Fantastic simulation presented by Metin Ata at the #COSMOS2022Paris meeting. https://t.co/PYXY71P8g1 COSMOS Survey @cosmosastro July 12, 2022 RT @hjmccracken: What a week ! I have been organising the @cosmosastro with @astrocaits and @Jeyhan meeting at @astroIAP and JUST BY COINC… FOR THE PUBLIC * About * Why different wavelengths? * Telescopes Used * Structure in the Universe * Explore COSMOS * COSMOS and art * News, Videos and Social Media FOR ASTRONOMERS * Overview * COSMOS filter set * Multiwavelength Datasets * Enhanced Data Products * Other tools FOR REVIEWERS * Overview PUBLICATIONS * Overview * Refereed Papers * Previous Team Meetings Contact Us ©2015 California Institute of Technology. All Rights Reserved.