The Astrophysical Journal (Jan 2025)
A Measurement of the Largest-scale CMB E-mode Polarization with CLASS
- Yunyang Li,
- Joseph R. Eimer,
- John W. Appel,
- Charles L. Bennett,
- Michael K. Brewer,
- Sarah Marie Bruno,
- Ricardo Bustos,
- Carol Yan Yan Chan,
- David T. Chuss,
- Joseph Cleary,
- Sumit Dahal,
- Rahul Datta,
- Jullianna Denes Couto,
- Kevin L. Denis,
- Rolando Dünner,
- Thomas Essinger-Hileman,
- Kathleen Harrington,
- Kyle Helson,
- Johannes Hubmayr,
- Jeffrey Iuliano,
- John Karakla,
- Tobias A. Marriage,
- Nathan J. Miller,
- Carolina Morales Perez,
- Lucas P. Parker,
- Matthew A. Petroff,
- Rodrigo A. Reeves,
- Karwan Rostem,
- Caleigh Ryan,
- Rui Shi,
- Koji Shukawa,
- Deniz A. N. Valle,
- Duncan J. Watts,
- Janet L. Weiland,
- Edward J. Wollack,
- Zhilei Xu,
- Lingzhen Zeng
Affiliations
- Yunyang Li
- ORCiD
- Kavli Institute for Cosmological Physics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA ; [email protected]; The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Joseph R. Eimer
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- John W. Appel
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Charles L. Bennett
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Michael K. Brewer
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Sarah Marie Bruno
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Ricardo Bustos
- ORCiD
- Departamento de Ingeniería Eléctrica, Universidad Católica de la Santísima Concepción , Alonso de Ribera 2850, Concepción, Chile
- Carol Yan Yan Chan
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- David T. Chuss
- ORCiD
- Department of Physics, Villanova University , 800 Lancaster Avenue, Villanova, PA 19085, USA
- Joseph Cleary
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Sumit Dahal
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA; NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Rahul Datta
- ORCiD
- Department of Astronomy and Astrophysics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA
- Jullianna Denes Couto
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Kevin L. Denis
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Rolando Dünner
- ORCiD
- Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile , Avenida Vicuña Mackenna 4860, 7820436, Chile; Centro de Astro-Ingeniería, Facultad de Física, Pontificia Universidad Católica de Chile , Avenida Vicuña Mackenna 4860, 7820436, Chile í
- Thomas Essinger-Hileman
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Kathleen Harrington
- ORCiD
- Department of Astronomy and Astrophysics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA; High Energy Physics Division , Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL 60439, USA
- Kyle Helson
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA; University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250, USA
- Johannes Hubmayr
- ORCiD
- Quantum Sensors Division , NIST, 325 Broadway, Boulder, CO 80305, USA
- Jeffrey Iuliano
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- John Karakla
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Tobias A. Marriage
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Nathan J. Miller
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA; NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Carolina Morales Perez
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Lucas P. Parker
- ORCiD
- Space Remote Sensing and Data Science , Los Alamos National Laboratory, Los Alamos, NM 87545, USA
- Matthew A. Petroff
- ORCiD
- Center for Astrophysics , Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
- Rodrigo A. Reeves
- ORCiD
- CePIA, Astronomy Department, Universidad de Concepción , Casilla 160-C, Concepción, Chile
- Karwan Rostem
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Caleigh Ryan
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Rui Shi
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Koji Shukawa
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Deniz A. N. Valle
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Duncan J. Watts
- ORCiD
- Institute of Theoretical Astrophysics, University of Oslo , P.O. Box 1029 Blindern, N-0315 Oslo, Norway
- Janet L. Weiland
- ORCiD
- The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , 3701 San Martin Drive, Baltimore, MD 21218, USA
- Edward J. Wollack
- ORCiD
- NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Zhilei Xu
- ORCiD
- MIT Kavli Institute , Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Lingzhen Zeng
- ORCiD
- Center for Astrophysics , Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
- DOI
- https://doi.org/10.3847/1538-4357/adc723
- Journal volume & issue
-
Vol. 986,
no. 2
p. 111
Abstract
We present measurements of large-scale cosmic microwave background E -mode polarization from the Cosmology Large Angular Scale Surveyor 90 GHz data. Using 115 det-yr of observations collected through 2024 with a variable-delay polarization modulator, we achieved a polarization sensitivity of $82\,\mu {\rm{K}}\,{\rm{arcmin}}$ , comparable to Planck at similar frequencies (100 and 143 GHz ). The analysis demonstrates effective mitigation of systematic errors and addresses challenges to large-angular-scale power recovery posed by time-domain filtering in maximum-likelihood map-making. A novel implementation of the pixel-space transfer matrix is introduced, which enables efficient filtering simulations and bias correction in the power spectrum using the quadratic cross-spectrum estimator. Overall, we achieved an unbiased time-domain filtering correction to recover the largest angular scale polarization, with the only power deficit, arising from map-making nonlinearity, being characterized as 30), our results, both independently and in cross-correlation with Planck, remain fully consistent with Planck’s measurements.
Keywords
