3 papers
astro-ph.CO2025
Estimating constraints on cosmological parameters via the canonical and the differential redshift drift with SKA HI 21-cm observations
Jiangang Kang, Guangyuan Song, Tong Jie Zhang +1
Redshift drift effect, an observational probe that indenpendent of cosmological models, presents unique applications in specific cosmological epoch. By quantifying redshift drift s…
astro-ph.CO2025
Redshift drift effect through the observation of HI 21cm signal with SKA
Jiangang Kang, Tong-Jie Zhang, Peng He +1
This study presents the findings of using the Square Kilometre Array (SKA) telescope to measure redshift drift via the HI 21cm signal, employing semi-annual observational interval…
astro-ph.CO2024
Toward a direct measurement of the cosmic acceleration: The pilot observation of H I 21cm absorption line at FAST
Jiangang Kang, Chang-Zhi Lu, TongJie Zhang +1
This study presents results on detecting neutral atomic hydrogen (HI) 21cm absorption in the spectrum of PKS1413+135 at redshift . The observation was conducted by FA…