Taiji program in space for gravitational universe with the first run key technologies test in Taiji-1

Wu, Yue‐Liang; Luo, Ziren; Wang, Jianyu; Bai, M; Bian, Wei; Cai, Haiwen; Cai, Rong-Gen; Cai, Zhiming; Cao, J.; Chen, Bin; Chen, Dijun; Chen, Guangfeng; Chen, Kun; Chen, Ling; Chen, Lisheng; Chen, Ming-Wei; Chen, Weibiao; Chen, Yan; Chen, Ze-Yi; Chi, Yi-Xing; Cong, Linxiao; Deng, Jianfeng; Deng, Xiaoqin; Dong, Xiao-Long; Duan, Li; Fan, Da Peng; Fan, Sen-Quan; Fan, Shoushan; Fang, Chao; Fang, Yuan; Feng, Ke; Feng, Jianchao; Feng, Pan; Feng, Zhun; Chen, Gao; Gao, Ruihong; Gao, Run-Lian; Guo, Bin; Guo, Tong; Guo, Xiaoliang; Guo, Xu; Guo, Zong-Kuan; He, Jianhua; He, J.; Hou, Xinjuan; Hu, Liang; Hu, Wenrui; Zhi-qiang, HU; Huang, Min-Jie; Jia, Jianjun; Jiang, Kaili; Jin, Gang; Jin, Hong-Bo; Kang, Bao-Peng; Kang, Qi; Kong, Feng-Lian; Lei, Jungang; Li, Bo‐Quan; Li, Cunhui; Li, Dongjing; Li, Fan; Li, Haosi; Li, Huadong; Li, Huawang; Li, Jiang; Li, Liu-Feng; Li, Wei; Li, Xiaokang; Li, Yingmin; Li, Yonggui; Liu, Yunpeng; Li, Yupeng; Zhao, Li; Li, Zhe; Liang, Hong; Lin, Huang De; Lin, Zhi-Yong; Liu, Chang; Liu, Dong-Bin; Liu, Heshan; Liu, Hong; Liu, Peng; Liu, Yurong; Lu, Zong-Yu; Luo, Hong-Wei; Luo, Jun; Ma, Fu-Li; Ma, Longfei; Ma, Xiaoshan; Ma, Xin; Man, Yi-Chuan; Mao, Jun-Cheng; Min, J.; Yu, Ning; Peng, Jiankang; Peng, Xiaodong; Qi, Keqi; Qiang, Li-É; Qiao, C. F.; Qu, Ye-Xi; Ruan, Wen-Hong; Sha, Wei E. I.; Shen, Jia; Shi, Xingjian; Shu, Rong; Su, Ju; Su, Peng; Sui, Yanlin; Sun, Guangwei; Tan, He-Ping; Tang, Wenlin; Tao, Hong-Jiang; Tao, Wen-Ze; Tian, Zheng; Wan, Ling-Feng; Wang, Chenyu; Wang, Jia; Wang, Juan; Wang, Jun-Biao; Wang, Lin-Lin; Wang, Pengcheng; Wang, Shaoxin; Wang, Xiaopeng; Wang, Yanfeng; Wang, Yukun; Wang, Zhi; Wang, Zuolei; Wei, Yongqiang; Wei, Yu-Xiao; Wu, Di; Wu, Li‐Ming; Wu, Pengzhan; Wu, Zhihua; Xi, Dong-Xue; Xie, Yuchen; Xin, Guofeng; Xu, Heng-Tong; Xu, Luxiang; Xu, Peng; Xu, Shuyan; Yu, Xu; Xue, Bing; Xue, Da-Tong; Xue, Sen-Wen; Xue, Zhang-Bin; Yang, Chao; Yang, Ran; Yang, Shi-Jia; Yang, Su‐Jau; Yang, Yong; Yang, Zhongguo; Yin, Yong-Li; Yu, Duli; Yu, Jiabin; Yu, Tao; Zhang, Ài-Bing; Zhang, Bing; Zhang, Chu; Zhang, Min; Zhang, Jing; Zhang, Ruijun; Zhang, Xiaofeng; Zhang, Xiaoqing; Zhang, Xuequan; Zhang, Yonghe; Zhang, Yuzhu; Zhang, Yuan‐Zhong; Zhao, Mengyuan; Zhao, Jian; Zhao, Weiwei; Zhao, Ya; Zheng, Jian-Hua; Zhou, Cui-Yun; Zhou, Ying; Zhu, R. Y.; Zhu, Xiaoxin; Zhu, Xiaoyi; Zhu, Zhencai; Zou, Xiao-Bo; Zou, Zi-Ming

doi:10.1142/s0217751x21020024

“…The most important individual technologies of China's space GW antenna were verified in space, including the gravitational reference sensors (GRS), the high precision laser interferometers, the drag-free control system, µ-N thrusters, the ultra-stable and clean platform and etc.. The successful operation of Taiji-1 has demonstrated and confirmed the designed performances of the scientific payloads and the satellite platform [20,25]. During the final extended phase in 2022, the Taiji-1 satellite will carry out the challenging experiments on the global gravity recoveries.…”

Section: Introductionmentioning

confidence: 85%

“…The scientific objectives will include such GW sources as coalescing super * xupeng@imech.ac.cn massive black hole binaries, extreme mass ratio inspirals, stochastic GW backgrounds and etc. [16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Global Gravity Field Model from Taiji-1 Observations

Wu,

Xu,

Zhao

et al. 2022

Preprint

Self Cite

1

0

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Taiji-1 is the first technology demonstration satellite of the Taiji program of China's space-borne gravitational wave antenna. After the demonstration of the key individual technologies, Taiji-1 continues collecting the data of the precision orbit determinations, the satellite attitudes, and the non-conservative forces exerted on the S/C. Therefore, during its free-fall, Taiji-1 can be viewed as operating in the high-low satellite-to-satellite tracking mode of a gravity recovery mission. In this work, one month data from Taiji-1's observations have been selected and the techniques are developed to resolve the long term interruptions and disturbances in the measurement data due to the scheduled technology demonstration experiments. The first global gravity model TJGM-r1911, that independently derived from China's own satellite mission, is successfully built from Taiji-1's observations. Compared with gravity models from CHAMP and other satellite gravity missions, the accuracy discrepancies exist, which is mainly caused by the data discontinuity problem. As the approved extended free-falling phase with minimal disruptions and disturbances, Taiji-1 will serve as the first gravity mission satellite for China since 2022 and it will provide us the independent measurement of both the static and the monthly time-variable global gravity field.

show abstract

“…The most important individual technologies of China's space GW antenna were verified in space, including the gravitational reference sensors (GRS), the high precision laser interferometers, the drag-free control system, µ-N thrusters, the ultra-stable and clean platform and etc.. The successful operation of Taiji-1 has demonstrated and confirmed the designed performances of the scientific payloads and the satellite platform [20,25]. During the final extended phase in 2022, the Taiji-1 satellite will carry out the challenging experiments on the global gravity recoveries.…”

Section: Introductionmentioning

confidence: 85%

“…The scientific objectives will include such GW sources as coalescing super massive black hole binaries, extreme mass ratio inspirals, stochastic GW backgrounds and etc. [16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Global Gravity Field Model from Taiji-1

Wu

¹

,

Xu

²

,

Qiang

³

et al. 2022

Preprint

Self Cite

0

View full text Add to dashboard Cite

Taiji-1 is the first technology demonstration satellite of the Taiji program of China's space-borne gravitational wave antenna. After the demonstration of the key individual technologies, Taiji-1 continues collecting the data of the precision orbit determinations, the satellite attitudes, and the non-conservative forces exerted on the S/C. Therefore, during its free-fall, Taiji-1 can be viewed as operating in the high-low satellite-to-satellite tracking mode of a gravity recovery mission. In this work, one month data from Taiji-1's observations have been selected and the techniques are developed to resolve the long term interruptions and disturbances in the measurement data due to the scheduled technology demonstration experiments. The first global gravity model TJGM-r1911, that independently derived from China's own satellite mission, is successfully built from Taiji-1's observations. Compared with gravity models from CHAMP and other satellite gravity missions, the accuracy discrepancies exist, which is mainly caused by the data discontinuity problem. As the approved extended free-falling phase with minimal disruptions and disturbances, Taiji-1 will serve as the first gravity mission satellite for China since 2022 and it will provide us the independent measurement of both the static and the monthly time-variable global gravity field.

show abstract

“…The third-generation ground-based GW detectors, i.e., the Cosmic Explorer [66,67] and the Einstein Telescope (ET) [68,69], aimed at high frequency-band (a few hundred hertz) GW detections, will begin observing in the 2030s. At the same time, the space-based GW detectors, i.e., LISA [70][71][72][73][74][75], Tian-Qin [76][77][78][79][80], and Taiji [81][82][83][84], will open the window of detecting milli-hertz frequency-band GWs. These GW standard siren observations could play an important role in breaking the cosmological parameter degeneracies generated by the EM cosmological probes [53][54][55][56][57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

How can gravitational-wave standard sirens and 21 cm intensity mapping jointly provide a precise late-universe cosmological probe?

Jin,

Wang,

Wu

et al. 2021

Preprint

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In the next decades, the gravitational-wave (GW) standard siren observations and the neutral hydrogen 21 cm intensity mapping (IM) surveys, as two promising non-optical cosmological probes, will play an important role in precisely measuring cosmological parameters. In this work, we make a forecast for cosmological parameter estimation with the synergy between the GW standard siren observations and the 21 cm IM surveys. We choose the Taiji observatory and the Einstein Telescope (ET) as the representatives of the GW detection projects and choose the Square Kilometre Array (SKA) phase I mid-frequency array as the representative of the 21 cm IM experiments. We find that the synergy of the GW standard siren observations and the 21 cm IM surveys could break the cosmological parameter degeneracies. The joint Taiji+ET+SKA data give σ(H0) = 0.23 km s −1 Mpc −1 in the ΛCDM model, σ(w) = 0.025 in the wCDM model, and σ(w0) = 0.057 and σ(wa) = 0.275 in the CPL model, which are better than the results of P lanck 2018 TT,TE,EE+lowE+lensing+SNe+BAO. In the ΛCDM model, the constraint accuracies of H0 and Ωm are less than or rather close to 1%, indicating that the magnificent prospects for non-optical precision cosmology are worth expecting.

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Taiji program in space for gravitational universe with the first run key technologies test in Taiji-1

Cited by 9 publications

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Global Gravity Field Model from Taiji-1 Observations

Global Gravity Field Model from Taiji-1 Observations

Global Gravity Field Model from Taiji-1

How can gravitational-wave standard sirens and 21 cm intensity mapping jointly provide a precise late-universe cosmological probe?

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