Creation and development of the astronomical observatory of Kharkiv university in the 80s and 90s of the XIXth century

The article is devoted to the study of the dialect language worldview based on the material of «Smolensk ethnographic collection» by Vladimir Nikolayevich Dobrovolsky (1856–1920) who was an ethnographer, local historian,folklorist, and lexicographer. The article presents general characteristics of proverbs and sayings included in the collection, describes the ways of recording and distribution of the material collected by the researcher, provides examples of proverbs and sayings, dialogues and poems, sentences and superstitious beliefs that the ethnographer, for various reasons, included in the collection. There are not many works on the study of dialect phraseology, not all Russian territories have this priceless heritage like records of phraseological material compiled at the time of their live functioning. V. N. Dobrovolsky included these phraseological units into the collection after his trips to the Smolensk region. The article proves necessity and prospects of further study of ethnographic material and formulates tasks that modern researchers of V.N. Dobrovolsky’s heritage are facing. The description of phraseological material of the collection makes it possible not only recreate the everyday life of the Smolensk peasant of the XIXth century, his life and cultural attitudes, but also to identify the features of the Smolensk dialect language worldview, to characterize paroemiological units based on national and cultural stereotypes of the Smolensk region people’s behavior.

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Activity of the first interstellar comet 2I/Borisov around perihelion: results from Indian observatories

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab084 ◽

2021 ◽

Vol 502 (3) ◽

pp. 3491-3499

Author(s):

K Aravind ◽

Shashikiran Ganesh ◽

Kumar Venkataramani ◽

Devendra Sahu ◽

Dorje Angchuk ◽

...

Keyword(s):

Solar System ◽

Production Rate ◽

Rate Ratio ◽

Carbon Chain ◽

Astronomical Observatory ◽

Nucleus Size ◽

Chain Molecules ◽

Molecular Emission ◽

Imaging And Spectroscopy ◽

Gas Ratio

ABSTRACT Comet 2I/Borisov is the first true interstellar comet discovered. Here, we present results from observational programs at two Indian observatories, 2 m Himalayan Chandra Telescope at the Indian Astronomical Observatory, Hanle (HCT) and 1.2 m telescope at the Mount Abu Infrared Observatory (MIRO). Two epochs of imaging and spectroscopy were carried out at the HCT and three epochs of imaging at MIRO. We found CN to be the dominant molecular emission on both epochs, 2019 November 30 and December 22, at distances of rH = 2.013 and 2.031 au, respectively. The comet was inferred to be relatively depleted in Carbon bearing molecules on the basis of low C2 and C3 abundances. We find the production rate ratio, Q(C2)/Q(CN) = 0.54 ± 0.18, pre-perihelion and Q(C2)/Q(CN) = 0.34 ± 0.12 post-perihelion. This classifies the comet as being moderately depleted in carbon chain molecules. Using the results from spectroscopic observations, we believe the comet to have a chemically heterogeneous surface having variation in abundance of carbon chain molecules. From imaging observations, we infer a dust-to-gas ratio similar to carbon chain depleted comets of the Solar system. We also compute the nucleus size to be in the range 0.18 km ≤ r ≤ 3.1 km. Our observations show that 2I/Borisov’s behaviour is analogous to that of the Solar system comets.

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