5 papers
Sensitivity of the redshifted 21 cm signal from the Dark Ages to parameters of primordial magnetic fields
Bohdan Novosyadlyj, Yurii Kulinich, Nazar Fortuna +1
We analyse the impact of the decaying magnetic turbulence of primordial magnetic fields (PMFs) and ambipolar diffusion on the ionisation and thermal history of the Dark Ages Univer…
Global Signals of the First Molecules from the Dark Ages in the Presence of Primordial Magnetic Fields
Yurii Kulinich, Bohdan Novosyadlyj, Maksym Tsizh +1
We investigate how primordial magnetic fields (PMFs) affect the formation kinetics of the first molecules, H, HD, and HeH, as well as the populations of rovibrational level…
Ukrainian Wartime Astronomy and its Prospects
Danilo Albergaria, Kateryna Frantseva, Pedro Russo +20
The Russian invasion of Ukraine damaged or compromised astronomical facilities and has prompted the displacement of researchers. A plan to restore Ukrainian astronomy, rooted in a…
Global signal in the redshifted hydrogen 21-cm line from the Dark Ages and Cosmic Dawn: Dependence on the nature of dark matter and modeling of first light
Bohdan Novosyadlyj, Yurii Kulinich, Danylo Koval
We estimate the global signal in the redshifted hyperfine structure line 21 cm of hydrogen atoms formed during the Dark Ages and Cosmic Dawn epochs. The evolution of the brightness…
Distortion of the CMB spectrum by the first molecules of the Dark Ages
Yurii Kulinich, Bohdan Novosyadlyj
The formation of first stars and galaxies at the Cosmic Dawn had been preceded by the chain of primordial chemistry reactions during Dark Ages which generated first molecules, most…