Observations

Molecular clouds contain regions of active star formation. Studying the physical and chemical conditions at the initial stages of these processes allows modeling the chemistry and beginning to better understand the principles of star, planet, and their system formation. The main objects of study are dense cores, information about which is obtained from rotational transitions of molecules observed using radio telescopes (IRAM 30m) or their arrays (NOEMA).
The main focus of the work is investigating deuterium fractionation in cold dense cores of low-mass star-forming regions. The high proportion of isotopologues containing deuterium among the compounds present in such regions indicates the occurrence of the first stage of star formation and the possibility of further evolution of objects. We study how exactly the deuterium fraction depends on other physical and chemical parameters, and also compare the obtained results with calculated ones to improve the initial conditions of our models and estimate the possible chemical age of dense cores.
In addition, we study the influence of protostar formation on deuterium fractionation in cold dense cores. The proportion of deuterated compounds in them increases during evolution, and after the formation of a class 0 protostar - decreases due to changes in physical conditions. Consideration of this phenomenon is necessary for describing the process of deuterium fractionation and the possible influence of class I and class II protostars on neighboring dense cores. The obtained data can be used in the future in more complex chemical models.

Main → Observations