Results 61 to 70 of about 140,038 (258)

Forecast of Foreground Cleaning Strategies for AliCPT-1

The Astrophysical Journal Supplement Series
We report the test results of several independent foreground cleaning pipelines used in the Ali CMB Polarization Telescope experiment (AliCPT-1), a high-altitude cosmic microwave background (CMB) imager in the Northern Hemisphere with thousands of ...
Junzhou Zhang, Shamik Ghosh, Jiazheng Dou, Yang Liu, Siyu Li, Jiming Chen, Jiaxin Wang, Zhaoxuan Zhang, Jacques Delabrouille, Mathieu Remazeilles, Chang Feng, Bin Hu, Hao Liu, Larissa Santos, Pengjie Zhang, Wen Zhao, Le Zhang, Zhi-Qi Huang, Hong Li, Xinmin Zhang   +19 more
doaj   +1 more source

Mitigating Cosmic Microwave Background Shadow Degradation of Tensor-to-scalar Ratio Measurements through Map-based Studies

The Astrophysical Journal Letters, 2023
It has been pointed out that the spurious cosmic microwave background (CMB) B -mode polarization signals caused by the absorption of the CMB monopole component due to the Galactic interstellar matter, called the CMB shadow, degrade the accuracy of ...
Tamaki Murokoshi, Yuji Chinone, Masashi Nashimoto, Kiyotomo Ichiki, Makoto Hattori   +4 more
doaj   +1 more source

Does the Correlation between 2MRS Galaxies and the CMB Indicate an Unmodeled CMB Foreground?

The Astrophysical Journal
We revisit the claimed detection of a new cosmic microwave background (CMB) foreground based on the correlation between low-redshift Two Micron All Sky Survey Redshift Survey (2MRS) galaxies and CMB temperature maps from the Planck and Wilkinson ...
Graeme E. Addison
doaj   +1 more source

Review on studies in natural background radiation

Radiation Protection and Environment, 2018
The environment around us is radioactive due to background radiation emitted from the sky, earth's crust, food, water, and building materials. The human body gets exposed to radiation doses of about 82%, which are out of control; they arise from ...
Abdu Hamoud Al-Khawlany, A R Khan, J M Pathan   +2 more
doaj   +1 more source

Lensing Reconstruction from the Cosmic Microwave Background Polarization with Machine Learning

The Astrophysical Journal, 2023
The lensing effect of the cosmic microwave background (CMB) is a powerful tool for our study of the distribution of matter in the universe. The quadratic estimator (QE) method, which is widely used to reconstruct lensing potential, has been known to be ...
Ye-Peng Yan, Guo-Jian Wang, Si-Yu Li, Yang-Jie Yan, Jun-Qing Xia   +4 more
doaj   +1 more source

Impacts of atmospheric river reconnaissance dropsondes on ECMWF Integrated Forecasting System precipitation forecasts

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Impacts of Atmospheric River Reconnaissance dropsonde observations on precipitation forecasts over the U.S. West Coast are examined in the European Centre for Medium‐Range Weather Forecasts (ECMWF) Integrated Forecasting System (IFS), using observing‐system experiments.
Jia Wang, David A. Lavers, Luca Delle Monache, Bruce Ingleby, Minghua Zheng, Xingren Wu, Fred Martin Ralph, Florian Pappenberger   +7 more
wiley   +1 more source

Revisiting the A L Lensing Anomaly in Planck 2018 Temperature Data

The Astrophysical Journal
We revisit the lensing anomaly in the Planck 2018 temperature (TT) data and examine its robustness to frequency selection and additional sky masking. Our main findings are as follows.
Graeme E. Addison, Charles L. Bennett, Mark Halpern, Gary Hinshaw, Janet L. Weiland   +4 more
doaj   +1 more source

Correlations between 21 cm Radiation and the CMB from Active Sources

, 2010
Neutral hydrogen is ubiquitous, absorbing and emitting 21 cm radiation throughout much of the Universe's history. Active sources of perturbations, such as cosmic strings, would generate simultaneous perturbations in the distribution of neutral hydrogen ...
Aaron Berndsen, Adshead, Albrecht, Albrecht, Alvarez, Battye, Bevis, Eisenstein, Furlanetto, Gangui, Giannantonio, Gott, Hu, Hu, Jones-Smith, Kaiser, Khatri, Landriau, Levon Pogosian, Lewis, Lewis, Mark Wyman, Myers, Pogosian, Pogosian, Pogosian, Pogosian, Rees, Sachs, Santos, Sarkar, Seager, Seljak, Slosar, Turok, Vilenkin, Vincent, Wyman, Zaldarriaga, Zeldovich   +39 more
core   +1 more source

Direct measurement of bidirectional turbulent fluxes of atmospheric cluster ions

Quarterly Journal of the Royal Meteorological Society, EarlyView.
First direct eddy covariance measurements of vertical turbulent fluxes of atmospheric cluster ions are presented. The net turbulent flux was mostly positive for negative cluster ions (net emission of negative ions) and mostly negative for positive cluster ions (net deposition of positive ions).
Luzie Kamecke, Anke C. Nölscher, Andreas Held   +2 more
wiley   +1 more source

Using LHASSO-observed Gamma-Ray Bursts to Study the Extragalactic Background Light

The Astrophysical Journal
The extragalactic background light (EBL), a diffuse radiation field produced by all galaxies throughout cosmic history, plays a crucial role in the propagation of high-energy gamma-rays through photon–photon interactions.
Longhua Qin, Jiancheng Wang, Chuyuan Yang, Quangui Gao, Huaizhen Li, Ju Ma, Weiwei Na, Ao Wang, Xu Zhang, Baoyu Ma, Tingfeng Yi, Zunli Yuan, Chunxia Gu   +12 more
doaj   +1 more source