Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Shmeld, I."'
We present the results of a 5-year monitoring program of 42 sources targeted at 6.7 GHz methanol masers, conducted from March 2017 to October 2022 using the Irbene 32 and 16 meter radio telescopes. Sources were observed with irregular intervals where
Externí odkaz:
http://arxiv.org/abs/2310.08273
Autor:
Aberfelds, A, Bartkiewicz, A, Szymczak, M, Šteinbergs, J, Surcis, G, Kobak, A, Durjasz, M, Shmeld, I
Publikováno v:
MNRAS, Volume 524, Issue 1, September 2023, Pages 599-618
{The variability study of 6.7\,GHz methanol masers has become a useful way to improve our understanding of the physical conditions in high-mass star-forming regions.} {Based on the single-dish monitoring using the Irbene telescopes, we selected three
Externí odkaz:
http://arxiv.org/abs/2307.03663
Autor:
Patoka, O., Antyufeyev, O., Shmeld, I., Bezrukovs, V., Bleiders, M., Orbidans, A., Aberfelds, A., Shulga, V.
Publikováno v:
A&A 652, A17 (2021)
Aims.Molecular masers, including methanol and hydroxyl masers, and in particular the ones in excited rotational states (ex-OHmasers), are one of the most informative tools for studying star-forming regions. So, the discovery, of new maser sources in
Externí odkaz:
http://arxiv.org/abs/2106.11585
Understanding gas-grain chemistry of deuterium in star-forming objects may help to explain their history and present state. We aim to clarify how processes in ices affect the deuterium fractionation. In this regard, we investigate a Solar-mass protos
Externí odkaz:
http://arxiv.org/abs/1701.05856
Autor:
Molotov, I., Tuccari, G., Nechaeva, M., Dugin, N., Konovalenko, A., Falkovich, I., Gorshenkov, Y., Liu, X., Volvach, A., Agapov, V., Pushkarev, A., Titenko, V., Buttacio, S., Rumyantsev, V., Shmeld, I.
Since 1999 we carried out seven trial VLBI radar experiments under LFVN project. The aim of this work is to adjust new research technique for investigating the Solar system bodies (planets, asteroids, space debris). It is planned to obtain the inform
Externí odkaz:
http://arxiv.org/abs/astro-ph/0412694
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Dec2023, Vol. 526 Issue 4, p5699-5714, 16p
Autor:
Nechaeva M., Antipenko A., Bezrukov D., Bezrukovs Vl., Dementjev A., Dugin N., Jekabsons N., Khutornoy R., Klapers M., Konovalenko A., Kulishenko V., Nabatov A., Nesteruk V., Pupillo G., Reznichenko A., Salerno E., Shmeld I., Skirmante K., Tikhomirov Yu., Voytyuk V.
Publikováno v:
Open Astronomy, Vol 22, Iss 4, Pp 341-346 (2013)
An international VLBI experiment on radio location of the asteroid 2012 DA14 was organized on 2013 February 15–16, during its flyby close to Earth. The purpose of observations was to investigate and specify orbital parameters of the asteroid, as we
Externí odkaz:
https://doaj.org/article/ffc64223807841c19dd3f9b7c0d3e7fe
Publikováno v:
Open Astronomy, Vol 22, Iss 4, Pp 329-340 (2013)
A fully steerable parabolic antenna RT-32 with the mirror diameter 32 m owned by the Ventspils International Radio Astronomy Centre (VIRAC) is available for fundamental and applied research in radio astronomy. The RT-32 is supplied with the receiving
Externí odkaz:
https://doaj.org/article/fb62f63333474d51a7f58781c7b11ec3
Autor:
Nechaeva M., Antipenko A., Bezrukovs V., Bezrukov D., Dementjev A., Dugin N., Konovalenko A., Kulishenko V., Liu X., Nabatov A., Nesteruk V., Pupillo G., Reznichenko A., Salerno E., Shmeld I., Shulga O., Sybiryakova Y., Tikhomirov Yu., Tkachenko A., Volvach A., Yang W.-J.
Publikováno v:
Open Astronomy, Vol 22, Iss 1, Pp 35-41 (2013)
An experiment on radar location of space debris objects using of the method of VLBI was carried out in April, 2012. The radar VLBI experiment consisted in irradiation of some space debris objects (4 rocket stages and 5 inactive satellites) with a sig
Externí odkaz:
https://doaj.org/article/c631bda43efe4564907fdce47d50804a
Autor:
Dugin N., Antipenko A., Bezrukovs V., Gavrilenko V., Dementjev A., Lesins A., Nechaeva M., Shmeld I., Snegirev S., Tikhomirov Yu., Trokss J.
Publikováno v:
Open Astronomy, Vol 22, Iss 1, Pp 25-33 (2013)
Since 2012, the Radiophysical Research Institute and the Lobachevsky State University at Nizhny Novgorod, Russia and the Ventspils International Radio Astronomy Centre at Irbene, Latvia are making radio interferometric experiments on study of ionosph
Externí odkaz:
https://doaj.org/article/eb49d840da6440f0ad7f5110cdfe2762