Kent Irwin

About

Kent Irwin is the Director of the Hansen Experimental Physics Laboratory (HEPL) and a Professor of Physics, specializing in Particle Physics, Astrophysics, and Photon Science at Stanford University. He holds a Ph.D. and an M.S.. from Stanford University, earned in 1995, and a B.S. from the California Institute of Technology obtained in 1988. His research interests encompass experimental and observational astrophysics and cosmology, as well as experimental particle physics. As a faculty member, he contributes to the advancement of physics through his leadership in experimental physics research and education at Stanford.

Research topics

• Physics
• Computer Science
• Astrophysics
• Astronomy
• Optics
• Quantum mechanics
• Engineering
• Mathematics
• Particle physics
• Statistics

Selected publications

• The Atacama Cosmology Telescope: DR4 maps and cosmological parameters

  Journal of Cosmology and Astroparticle Physics · 2020 · 601 citations

  <p>We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013–2016 at 98 and 150 GHz. The maps cover more than 17,000 deg<sup>2</sup>, the deepest 600 deg<sup>2</sup> with noise levels below 10μK-arcmin. We use the power spectrum derived from almost 6,000 deg<sup>2</sup> of these maps to con…

  DOI

• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters

  The Astrophysical Journal · 2024-02-01 · 295 citations

  articleOpen access

  Abstract We present cosmological constraints from a gravitational lensing mass map covering 9400 deg 2 reconstructed from measurements of the cosmic microwave background (CMB) made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In combination with measurements of baryon acoustic oscillations and big bang nucleosynthesis, we obtain the clustering amplitude σ 8 = 0.819 ± 0.015 at 1.8% precision, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mm…

  PublisherOA PDFDOI

• The Atacama Cosmology Telescope: a measurement of the cosmic microwave background power spectra at 98 and 150 GHz

  Journal of Cosmology and Astroparticle Physics · 2020 · 287 citations

  We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers &gt;15000 deg2 at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission…

  DOI

• Measurements of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>E</mml:mi></mml:math>-mode polarization and temperature-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>E</mml:mi></mml:math>-mode correlation of the CMB from SPT-3G 2018 data

  Physical review. D/Physical review. D. · 2021 · 259 citations

  We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power spectrum of the cosmic microwave background using data collected by SPT-3G, the latest instrument installed on the South Pole Telescope. This analysis uses observations of a $1500\text{ }\text{ }{\mathrm{deg}}^{2}$ region at 95, 150, and 220 GHz taken over a four-month period in 2018. We report binned values of the $EE$ and $TE$ power spectra over the angular multipole range $30…

  DOI

• CMB-S4: Forecasting Constraints on Primordial Gravitational Waves

  The Astrophysical Journal · 2022 · 256 citations

  Abstract CMB-S4—the next-generation ground-based cosmic microwave background (CMB) experiment—is set to significantly advance the sensitivity of CMB measurements and enhance our understanding of the origin and evolution of the universe. Among the science cases pursued with CMB-S4, the quest for detecting primordial gravitational waves is a central driver of the experimental design. This work details the development of a forecasting framework that includes a power-spectrum-based semianalytic proj…

  PublisherOA PDFDOI

Recent grants

• Collaborative Research: Polarization Sensitive Multi-Chroic MKIDs

  NSF · $321k · 2015–2017

Frequent coauthors

• G. C. Hilton

  National Institute of Standards and Technology

  799 shared

• P. A. R. Ade

  Cardiff University

  549 shared

• C. L. Kuo

  534 shared

• Zeeshan Ahmed

  529 shared

• C. Tucker

  Cardiff University

  467 shared

• K. W. Yoon

  Stanford University

  452 shared

• C. D. Reintsema

  401 shared

• R. W. Ogburn

  SLAC National Accelerator Laboratory

  380 shared

Labs

• Hansen Experimental Physics Laboratory (HEPL)PI

Similar researchers at Stanford University

• Roger Blandfordh-205
• Persis S. Drellh-190
• Risa Wechslerh-165