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Articles by Daniel Eisenstein
The future of ΛCDM - Nature Astronomy
1. What is your perspective on the key cosmological observations that appear to be in tension with the Λ-cold-dark-matter model (ΛCDM)?
The first billion years according to JWST - Nature Astronomy
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Abstract With stunning clarity, the JWST has revealed the Universe’s first billion years. The scientific community is analysing a wealth of JWST imaging and spectroscopic data from that era, and is in the process of rewriting the astronomy textbooks. Here, as a result of the 2024 ISSI Breakthrough Workshop, we provide a snapshot of the great progress made towards understanding the initial chapters of our cosmic history 1.5 years into the JWST science mission.
By Angela Adamo, Micaela B. Bagley, Eduardo Bañados, Rachel Bezanson, Gabriel Brammer, Daniel Eisenstein, Jan J. Eldridge, Andrea Ferrara, Seiji Fujimoto, Anna de Graaff, Jeyhan Kartaltepe, Susan A. Kassin, Roberto Maiolino, Michael V. Maseda, Charlotte Mason, Jorryt Matthee, Georges Meynet, Pascal Oesch, Guido Roberts-Borsani, Daniel Schaerer, Alice Shapley, Feige Wang, Stephen Wilkins, Allison L. Strom
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Nature
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Photometric detection at 7.7 μm of a galaxy beyond redshift 14 with JWST/MIRI - Nature Astronomy
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Abstract The James Webb Space Telescope (JWST) has spectroscopically confirmed numerous galaxies at z > 10. While weak rest-frame ultraviolet emission lines have only been seen in a handful of sources, the stronger rest-frame optical emission lines are highly diagnostic and accessible at mid-infrared wavelengths with the Mid-Infrared Instrument (MIRI) of JWST.
By Jakob M. Helton, Zihao Wu, Daniel Eisenstein, Stefano Carniani, William Baker, Rachana Bhatawdekar, Andrew Bunker, Stephane Charlot, Jacopo Chevallard, Francesco d’Eugenio, Eiichi Egami, Benjamin Johnson, Gareth Jones, Jianwei Lyu, Roberto Maiolino, Pablo G. Pérez-González, Marcia Rieke, Brant E. Robertson, Aayush Saxena, Sandro Tacchella, Chris Willott, Lily Whitler
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Nature
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A core in a star-forming disc as evidence of inside-out growth in the early Universe - Nature Astronomy
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Abstract The physical processes that establish the morphological evolution and the structural diversity of galaxies are key unknowns in extragalactic astrophysics. Here we report the finding of the morphologically mature galaxy JADES-GS+53.18343−27.79097, which existed within the first 700 million years of the Universe’s history.
By William Baker, Sandro Tacchella, Benjamin Johnson, Erica Nelson, Katherine A. Suess, Mirko Curti, Anna de Graaff, Roberto Maiolino, Brant E. Robertson, Santiago Arribas, Kristan Boyett, Andrew Bunker, Stefano Carniani, Stephane Charlot, Zuyi Chen, Emma Curtis-Lake, Eiichi Egami, Daniel Eisenstein, Ryan Hausen, Jakob M. Helton, Nimisha Kumari, Tobias J. Looser, Michael V. Maseda, David Puskas, Hannah Übler, Christina Williams
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Nature
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Spectroscopic confirmation of two luminous galaxies at a redshift of 14 - Nature
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Abstract The first observations of JWST have revolutionized our understanding of the Universe by identifying for the first time galaxies at \(z\sim 13\)1–3. In addition, the discovery of many luminous galaxies at Cosmic Dawn (\(z > 10\)) has suggested that galaxies developed rapidly, in apparent tension with many standard models4–8. However, most of these galaxies lack spectroscopic confirmation, so their distances and properties are uncertain.
By Stefano Carniani, Daniel Eisenstein, Peter Viggo Jakobsen, Benjamin Johnson, Roberto Maiolino, Chris Willott, Brant E. Robertson, Santiago Arribas, William Baker, Rachana Bhatawdekar, Kristan Boyett, Andrew Bunker, Alex Cameron Verified, Stephane Charlot, Mirko Curti, Emma Curtis-Lake, Eiichi Egami, Gareth Jones, Nimisha Kumari, Michael V. Maseda, Eleonora Parlanti, Pablo G. Pérez-González, Tim Rawle, Marcia Rieke, Aayush Saxena, Renske Smit, Sandro Tacchella, Hannah Übler, Giacomo Venturi, Jakob M. Helton
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Nature
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A small and vigorous black hole in the early Universe - Nature
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Abstract Multiple theories have been proposed to describe the formation of black hole seeds in the early Universe and to explain the emergence of very massive black holes observed in the first billion years after Big Bang1–3. Models consider different seeding and accretion scenarios4–7, which require the detection and characterisation of black holes in the first few hundred million years after Big Bang to be validated.
By Roberto Maiolino, Joris Witstok, Stefano Carniani, Anna de Graaff, Hannah Übler, Sandro Tacchella, Emma Curtis-Lake, Santiago Arribas, Andrew Bunker, Stephane Charlot, Mirko Curti, Tobias J. Looser, Michael V. Maseda, Tim Rawle, Chris Willott, Eiichi Egami, Daniel Eisenstein, Brant E. Robertson, William Baker, Kristan Boyett, Andrew Fabian, Gareth Jones, Nimisha Kumari, Nicolas Laporte, Erica Nelson, Lester Sandles
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Nature
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Carbonaceous dust grains seen in the first billion years of cosmic time - Nature
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Author notes These authors contributed equally: Irene Shivaei, Renske Smit Authors and Affiliations Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge, UK Joris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J. Looser, William M. Baker, Lester Sandles, Jan Scholtz & Sandro Tacchella Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, UK Joris Witstok, Roberto Maiolino, Mirko Curti, Francesco D’Eugenio, Tobias J.
By Joris Witstok, Renske Smit, Stefano Carniani, Emma Curtis-Lake, Pierre Ferruit, Santiago Arribas, Andrew Bunker, Alex Cameron Verified, Stephane Charlot, Mirko Curti, Anna de Graaff, Tobias J. Looser, Tim Rawle, Chris Willott, William Baker, Kristan Boyett, Eiichi Egami, Daniel Eisenstein, Benjamin Johnson, Nimisha Kumari, Jianwei Lyu, Erica Nelson, Michele Perna, Marcia Rieke, Brant E. Robertson, Lester Sandles, Sandro Tacchella
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Nature
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Spectroscopic confirmation of four metal-poor galaxies at z = 10.3–13.2 - Nature Astronomy
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Abstract Finding and characterizing the first galaxies that illuminated the early universe at cosmic dawn is pivotal to understand the physical conditions and the processes that led to the formation of the first stars. In the first few months of operations, imaging from the James Webb Space Telescope (JWST) has been used to identify tens of candidates of galaxies at redshift (z) greater than 10, less than 450 million years after the Big Bang.
By Emma Curtis-Lake, Stefano Carniani, Alex Cameron Verified, Peter Viggo Jakobsen, Andrew Bunker, Renske Smit, Chris Willott, Santiago Arribas, Francesco d’Eugenio, Hans-Walter Rix, Daniel Eisenstein, Ryan Hausen, Benjamin Johnson, Brant E. Robertson, Christina Williams, Rebecca Bowler, Zuyi Chen, Gareth Jones, Erica Nelson, Aayush Saxena, Katherine A. Suess, Stephane Charlot, Joris Witstok, Pierre Ferruit, Mirko Curti, Tobias J. Looser, Nora Lützgendorf, Michael V. Maseda, Tim Rawle, Hannah Übler, Marco Sirianni, Eiichi Egami, Rachana Bhatawdekar, Kristan Boyett, Anna de Graaff, Raphael E. Hviding, Nimisha Kumari, Jianwei Lyu, Michele Perna, Lester Sandles
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Nature
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Eisenstein: Biden's "Ghost Gun" Crackdown Hardly Makes Sense
Columnist Daniel Eisenstein breaks down President Biden's plan to limit the manufacturing and use of "ghost guns." Courtesy of Polymer80 On June 23, 2021, President Biden instructed a handful of administrative decisions with the intention of preventing firearm-involved crimes, and on the 11th of this month, the final draft of the new regulations were published. One of the intended changes was to mitigate the use of “ghost guns” in criminal activity, though the specifics were highly unclear.
Eisenstein: What is a silencer?
Columnist Daniel Eisenstein explains the purpose and legality of firearm silencers. Photo Courtesy of Gar2chan via Wikimedia Commons. Contrary to popular belief, a firearm silencer or suppressor is not a device that magically turns a firearm into a quiet death machine only practical for assassins, government spies, James-Bond-film-antagonists and other criminals. Despite this, firearm silencers are more of a burden to own and procure than most firearms themselves. What are silencers used for anyway?
Eisenstein: Even if you do not own a firearm...
Columnist Daniel Eisenstein lists some basic rules of firearm safety that everyone needs to know. Courtesy of Kevin Reese via Flickr On the 21st of October, Film Producer and Actor Alec Baldwin discharged a firearm, wounding director Joel Souza and killing cinematographer Haylna Hutchins. Although the investigation is still ongoing, the fallout from the tragedy is rife with finger-pointing and political exploitation. There is no disagreement, however, that this incident was tragic and avoidable.
Eisenstein: Biden prohibits the importation of Russian ammunition
Columnist Daniel Eisenstein analyzes the Biden administration's decision to prohibit Russian ammunition importation. Daniel Eisenstein/Iowa State Daily Starting Sept. 7, the U.S. Department of State is no longer approving licenses to import Russian-made ammunition. This choice by the Biden administration cited the Aug. 2020 poisoning of Alexei Navalny. However, many American firearm owners view this decision as a blow to their right to keep and bear arms, and there are a few reasons why.
Obesogenic Behaviors of Rural Children on School and Nonschool Days
Introduction Childhood obesity is a major public health concern with one-in-three US children (6–11 years old) classified as either overweight or obese.1 Overweight and obesity in childhood presents significant health risks such as an increased risk for type 2 diabetes and other comorbidities.2 Studies have shown children living in rural areas are at increased risk of overweight and obesity compared with their urban-dwelling counterparts.3,4 Tackling childhood obesity requires careful...
Letter: Ghost guns are legal
Letter writer Daniel Eisenstein responds to a letter concerning "ghost guns," which are made by 3D printers. Courtesy of Unsplash Editor's Note: This letter is in response to a previous letter, "The dangers of ghost guns.". On March 29, I gave a presentation about 3D-printed firearms.
Letter: The Hysteria Surrounding “Ghost Guns”
Editor’s Note: This letter is in response to a previous letter, “The dangers of ghost guns.”. On March 29, I gave a presentation about 3D-printed firearms. Specifically, I explained some basic facts, clarified some misconceptions, discussed some recent history and legal developments, explained some projects I undertook and mentioned how an individual could get started on their own.
Guest Column: Why do we restrict weapons on campus?
Guest columnist Daniel Eisenstein questions why guns aren't allowed on campus despite surrounding federal and state legislation. Courtesy of Moussa81 According to , there are approximately 371,000 people permitted to carry a weapon in the state of Iowa. That is about one in every nine Iowa residents who are permitted to carry a weapon, including children that cannot be granted a permit and other legally non-eligible people.
Guest Column: What is a ghost gun?
Guest columnist Daniel Eisenstein evaluates the implications associated with ghost guns. Courtesy of Flickr As of right now, in most U.S. states, if you can legally own a given firearm, you can legally make that given firearm. You don’t even need a license as long as you don’t plan on selling or giving away that firearm to anyone else.
Создана крупнейшая 3D-карта Вселенной
Фото: Daniel Eisenstein / SDSS-III Международная группа ученых из проекта Sloan Digital Sky Survey III под руководством доктора Флориана Бетлера из Портсмутского университета (Великобритания) создала самую большую и подробную 3D-карту Вселенной, сообщает портал научных новостей Phys.org. Подробнее о работе можно узнать в свежем выпуске журнала Monthly Notices of the Royal Astronomical Society. Сообщается, что крупнейшая на сегодняшний день карта создана в рамках программы BOSS.
Dark energy measured with record-breaking map of 1.2 million galaxies
A team of hundreds of physicists and astronomers have announced results from the largest-ever, three-dimensional map of distant galaxies. The team constructed this map to make one of the most precise measurements yet of the dark energy currently driving the accelerated expansion of the Universe.
Largest-ever map of 1.2 million galaxies measures dark energy
Take a look around. The largest ever 3D map of the universe pinpoints the position of more than a million galaxies, and has allowed scientists to make one of the most precise measurements yet of dark energy – the mysterious unexplained force that is causing the universe to expand at an accelerating rate. “Over the last decade we have prepared and conducted the largest survey of the universe yet,” says Rita Tojeiro at the University of St Andrews in Scotland, who co-led the international team.
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