Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Yu. N. Efremov"'
Publikováno v:
Odessa Astronomical Publications, Vol 18, Iss 0, Pp 26-28 (2017)
The distribution of Cepheids in the Galaxy is studied using a new catalogue of Cepheid distances in conjunction with the method of hierarchical clustering. The resulting delineation of Cepheid complexes is compared with those for other Population I o
Externí odkaz:
https://doaj.org/article/a5e15c88267141dc9c303015d4952216
Autor:
V. V. Bruevich, E. V. Shimanovskaya, S. A. Guslyakova, V. Lang, Yu. N. Efremov, F. Sakhibov, A. E. Piskunov, N. V. Kharchenko, O. V. Ezhkova, Alexander S. Gusev
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 457:3334-3355
We present a study of complexes of young massive star clusters (YMCs), embedded in extragalactic giant HII regions, based on the coupling of spectroscopic with photometric and spectrophotometric observations of about 100 star forming regions in seven
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2399dff8f8fd7b45bccc3a1f8442c0ce
https://doi.org/10.1093/mnras/stw212
https://doi.org/10.1093/mnras/stw212
Autor:
Yu. N. Efremov
Publikováno v:
Астрономия-2018. Том 1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a1447409d3f9179f8283cd5e34f6e4f3
https://doi.org/10.31361/eaas.2018-1.033
https://doi.org/10.31361/eaas.2018-1.033
Publikováno v:
Astronomische Nachrichten. 336:401-408
The relations between star formation rates along the spiral arms and the velocities of gas inflow into the arms in the grand-design galaxy NGC 628 were studied. We found that the radial distribution of the average star formation rate in individual st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7a5ee613b54d609d7f3c1d6ffe03986
https://doi.org/10.1002/asna.201512170
https://doi.org/10.1002/asna.201512170
Autor:
Yu. N. Efremov
Publikováno v:
Open Astronomy, Vol 25, Iss 4, Pp 369-376 (2016)
Several strange objects in the spiral galaxy NGC 6946 are described. One of these objects is the giant stellar complex noted long ago; we suggested that its sharp semicircular western edge is a result of the ram pressure, arising owing to motion of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d43a8817223ca13f328170e20fe5bac1
https://doi.org/10.1515/astro-2017-0255
https://doi.org/10.1515/astro-2017-0255
Publikováno v:
Astronomy Letters. 38:543-548
We have constructed a dynamo model for the magnetic field in spiral galaxies that takes into account the differences in star formation rates in different galaxies. The difficulty in constructing the model is that the star formation rate does not ente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa7b872776cf0ca43dde01dbc4a6d6bb
https://doi.org/10.1134/s1063773712090034
https://doi.org/10.1134/s1063773712090034
Publikováno v:
Astrophysical Bulletin. 66:304-319
The parameters of the ionized gas in NGC 6946 (in the [NII]6548,6583, H-alpha and [SII]6717,6731 lines) are investigated with the SAO RAS BTA telescope along three positions of the long slit of the SCORPIO focal reducer, passing through a number of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7af012e382fd12635ee744e4690fa76f
https://doi.org/10.1134/s1990341311030035
https://doi.org/10.1134/s1990341311030035
Autor:
Pekka Teerikorpi, Yu. V. Baryshev, Gene Byrd, Mauri Valtonen, L. M. Domozhilova, Dmitry Makarov, V. P. Dolgachev, Yu. N. Efremov, I. D. Karachentsev, Arthur D. Chernin
Publikováno v:
Gravitation and Cosmology. 16:1-6
We report the detection of dark energy near the Milky Way made with precision observations of the local Hubble flow of expansion. We estimate the local density of dark energy and find that it is near, if not exactly equal to, the global dark energy d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b38d42973a78853c84ed4829c4047ab6
https://doi.org/10.1134/s0202289310010019
https://doi.org/10.1134/s0202289310010019
Autor:
Yu. N. Efremov
Publikováno v:
Astronomy Letters. 35:507-517
The fragmentation of gaseous spiral arms in the outer Galaxy into superclouds has been studied using recently published data on the HI distribution in the Galactic disk. Regular chains of superclouds have been found or confirmed in the Cygnus (Outer)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c864be5440c6f6927ee82e0f2df1b6e
https://doi.org/10.1134/s1063773709080015
https://doi.org/10.1134/s1063773709080015
Autor:
Emilio J. Alfaro, V. L. Afanasiev, M. C. Sanchez-Gil, Begoña García-Lorenzo, Yu. N. Efremov, Casiana Muñoz-Tuñón, Olga K. Sil'chenko, Nate Bastian, Paul W. Hodge, S. S. Larsen, R. Boomsma
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 382(2), 481-497. Oxford University Press
The characteristics of ionized and HI gas in the peculiar star/cluster complex in NGC 6946, obtained with the 6-m telescope (BTA) SAO RAS, the Gemini North telescope, and the Westerbork Synthesis Radio Telescope (WSRT), are presented. The complex is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cb7425d1ceda9e8be9137ff3e31a9a4
https://research.rug.nl/en/publications/dc2dbd96-16fd-45c9-ad91-4ed36a6cc323
https://research.rug.nl/en/publications/dc2dbd96-16fd-45c9-ad91-4ed36a6cc323