Zobrazeno 1 - 10
of 1 915
pro vyhledávání: '"Ghosh , Shamik"'
Publikováno v:
JCAP10(2024)046
The correlations between T, E modes and B modes in cosmic microwave background (CMB) radiation, which are expected to vanish under parity symmetry, have become a sensitive probe of the new physics beyond the standard model. In this paper, we forecast
Externí odkaz:
http://arxiv.org/abs/2403.19222
Autor:
Zhang, Junzhou, Ghosh, Shamik, Dou, Jiazheng, Liu, Yang, Li, Siyu, Chen, Jiming, Wang, Jiaxin, Zhang, Zhaoxuan, Delabrouille, Jacques, Remazeilles, Mathieu, Feng, Chang, Hu, Bin, Liu, Hao, Santos, Larissa, Zhang, Pengjie, Zhao, Wen, Zhang, Le, Huang, Zhi-Qi, Li, Hong, Kuo, Chao-Lin, Zhang, Xinmin
Publikováno v:
Astrophysical Journal Supplement Series, 274, 26, 2024
We report the test results of several independent foreground-cleaning pipelines used in the Ali CMB Polarization Telescope experiment (AliCPT-1), a high-altitude CMB imager in the Northern hemisphere with thousands of detectors dedicated to the searc
Externí odkaz:
http://arxiv.org/abs/2402.01233
Publikováno v:
A&A 688, A54 (2024)
The Planck space mission has observed the first three rotational lines of emission of Galactic CO. Those maps, however, are either noisy, or contaminated by astrophysical emissions from different origin. We revisit those data products to deliver new
Externí odkaz:
http://arxiv.org/abs/2312.07816
Publikováno v:
JCAP05(2024)006
One of the main goals of most future CMB experiments is the precise measurement of CMB B-mode polarization, whose major obstacle is the Galactic foregrounds. In this paper, we evaluate the foreground cleaning performance of the variants of the ILC me
Externí odkaz:
http://arxiv.org/abs/2310.19627
Autor:
Han, Jiakang, Hu, Bin, Ghosh, Shamik, Li, Siyu, Dou, Jiazheng, Delabrouille, Jacques, Jin, Jing, Li, Hong, Liu, Yang, Remazeilles, Mathieu, Zhao, Wen, Zhang, Pengjie, Li, Zheng-Wei, Liu, Cong-Zhan, Zhang, Yong-jie, Kuo, Chao-Lin, Zhang, Xinmin
Cosmic microwave background radiation (CMB) observations are unavoidably contaminated by emission from various extra-galactic foregrounds, which must be removed to obtain reliable measurements of the cosmological signal. In this paper, we demonstrate
Externí odkaz:
http://arxiv.org/abs/2303.05705
Autor:
Ghosh, Shamik, Jain, Pankaj, Kothari, Rahul, Panwar, Mohit, Singh, Gurmeet, Tiwari, Prabhakar
Publikováno v:
J. Astrophys. Astr. (2023) 44:22
The cosmological principle states that the Universe is statistically homogeneous and isotropic at large distance scales. There currently exist many observations which indicate a departure from this principle. It has been shown that many of these obse
Externí odkaz:
http://arxiv.org/abs/2301.03065
Autor:
Ghosh, Shamik, Liu, Yang, Zhang, Le, Li, Siyu, Zhang, Junzhou, Wang, Jiaxin, Dou, Jiazheng, Chen, Jiming, Delabrouille, Jacques, Remazeilles, Mathieu, Feng, Chang, Hu, Bin, Huang, Zhi-Qi, Liu, Hao, Santos, Larissa, Zhang, Pengjie, Zhang, Zhaoxuan, Zhao, Wen, Li, Hong, Zhang, Xinmin
Publikováno v:
JCAP 10, 063 (2022)
AliCPT is the first Chinese cosmic microwave background (CMB) experiment which will make the most precise measurements of the CMB polarization in the northern hemisphere. The key science goal for AliCPT is the detection of primordial gravitational wa
Externí odkaz:
http://arxiv.org/abs/2205.14804
Autor:
Liu, Jinyi, Sun, Zeyang, Han, Jiakang, Carron, Julien, Delabrouille, Jacques, Li, Siyu, Liu, Yang, Jin, Jing, Ghosh, Shamik, Yue, Bin, Zhang, Pengjie, Feng, Chang, Huang, Zhi-Qi, Liu, Hao, Wu, Yi-Wen, Zhang, Le, Zhang, Zi-Rui, Zhao, Wen, Hu, Bin, Li, Hong, Zhang, Xinmin
AliCPT-1 is the first Chinese CMB experiment aiming for high precision measurement of Cosmic Microwave Background B-mode polarization. The telescope, currently under deployment in Tibet, will observe in two frequency bands centered at 90 and 150 GHz.
Externí odkaz:
http://arxiv.org/abs/2204.08158
Estimating the cross-correlation power spectra of cosmic microwave background (CMB), in particular, the T B and EB spectra, is important for testing parity symmetry in cosmology and diagnosing insidious instruments systematics. The Quadratic Maximum
Externí odkaz:
http://arxiv.org/abs/2202.10733