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- Peter the Great St. Petersburg Polytechnic UniversityRU42 papers
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20 papers · 1 filter
Mapping HI 21-cm in the Klemola 31 group at z = 0.029: emission and absorption towards PKS2020-370
E. K. Maina, Abhisek Mohapatra, G. I. G. Jozsa +11
We present MeerKAT Absorption Line Survey (MALS) observations of the HI gas in the Klemola31 galaxy group (), located along the line of sight to the radio-loud quasar PKS2…
High-resolution, High-sensitivity, Low-frequency uGMRT View of Coma Cluster of Galaxies
D. V. Lal, N. Lyskova, C. Zhang +12
We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500 MHz and 550-850 MHz. At 250-500 MHz, 135 s…
Emergence of a new HI 21-cm absorption component at z~1.1726 towards the gamma-ray blazar PKS~2355-106
Raghunathan Srianand, Neeraj Gupta, Patrick Petitjean +12
We report the emergence of a new HI 21-cm absorption at z_abs = 1.172635 in the damped Lyman-alpha absorber (DLA) towards the gamma-ray blazar PKS 2355-106 (z_em~1.639) using scien…
Molecular hydrogen in absorption at high redshifts. Science cases for CUBES
Sergei Balashev, Pasquier Noterdaeme
Absorption lines from molecular hydrogen () in the spectra of background sources are a powerful probe of the physical conditions in intervening cold neutral medium. At hig…
Discovery of a damped Ly absorber originating in a spectacular interacting dwarf galaxy pair at
Erin Boettcher, Neeraj Gupta, Hsiao-Wen Chen +18
We present the discovery of neutral gas detected in both damped Ly absorption (DLA) and HI 21-cm emission outside of the stellar body of a galaxy, the first such detection in th…
Multi-phase gas properties of extremely strong intervening DLAs towards quasars
A. Ranjan, R. Srianand, P. Petitjean +6
We present the results of a spectroscopic analysis of extremely strong damped Lyman-α absorbers (ESDLAs, log N(Hi)>=21.7) observed with VLT-XShooter. ESDLAs probe gas from within t…