Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Efremov, Yu. P."'
Autor:
Gusev, A. S., Sakhibov, F., Piskunov, A. E., Kharchenko, N. V., Bruevich, V. V., Ezhkova, O. V., Guslyakova, S. A., Lang, V., Shimanovskaya, E. V., Efremov, Yu. N.
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:
http://arxiv.org/abs/1601.07470
Autor:
Gusev, A. S., Sakhibov, F. Kh., Piskunov, A. E., Kharchenko, N. V., Pilyugin, L. S., Ezhkova, O. V., Khramtsova, M. S., Guslyakova, S. A., Bruevich, V. V., Dodonov, S. N., Lang, V., Shimanovskaya, E. V., Efremov, Yu. N.
Publikováno v:
Astronomical and Astrophysical Transactions, Vol. 29, Issue 3, pp. 293-304 (2016)
We studied 102 star forming regions in seven spiral galaxies (NGC 628, NGC 783, NGC 2336, NGC 6217, NGC 6946, NGC 7331, and NGC 7678) on the basis of complex spectroscopic, photometric (UBVRI) and spectrophotometric (H alpha line) observations. Using
Externí odkaz:
http://arxiv.org/abs/1601.04062
Autor:
Dambis, A. K., Berdnikov, L. N., Efremov, Yu. N., Kniazev, A. Yu., Rastorguev, A. S., Glushkova, E. V., Kravtsov, V. V., Turner, D. G., Majaess, D. J., Sefako, R.
We use the currently most complete collection of reliable Cepheid positions (565 stars) out to ~5 kpc based mostly on our photometric data to outline the spiral pattern of our Galaxy. We find the pitch-angle to be equal to 9--10 degrees with the most
Externí odkaz:
http://arxiv.org/abs/1505.01782
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:
http://arxiv.org/abs/1108.0166
Autor:
Efremov, Yu. N.
Striking regularities are found in the northwestern arm of the M31 galaxy. Star complexes located in this arm are all spaced 1.2 kpc apart and have similar sizes of about 0.6 kpc. Within the same arm region Beck et al. (1989) detected a regular magne
Externí odkaz:
http://arxiv.org/abs/0909.4740
Autor:
Bastian, N., Gieles, M., Goodwin, S. P., Trancho, G., Smith, L. J., Konstantopoulos, I., Efremov, Yu.
The observed properties of young star clusters, such as the core radius and luminosity profile, change rapidly during the early evolution of the clusters. Here we present observations of 6 young clusters in M51 where we derive their sizes using HST i
Externí odkaz:
http://arxiv.org/abs/0806.1460
Autor:
Efremov, Yu. N., Afanasiev, V. L., Alfaro, E. J., Boomsma, R., Bastian, N., Larsen, S., Sanchez-Gil, M. C., Silchenko, O. K., Garcia-Lorenzo, B., Munoz-Tunon, C., Hodge, P. W.
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:
http://arxiv.org/abs/0707.4635
Autor:
Chernin, A. D., Karachentsev, I. D., Teerikorpi, P., Valtonen, M. J., Byrd, G. G., Efremov, Yu. N., Dolgachev, V. P., Domozhilova, L. M., Makarov, D. I., Baryshev, Yu. V.
Publikováno v:
Grav.Cosmol.16:1-6,2010
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:
http://arxiv.org/abs/0706.4068
Autor:
Bastian, N., Ercolano, B., Gieles, M., Rosolowsky, E., Scheepmaker, R. A., Gutermuth, R., Efremov, Yu.
Publikováno v:
Mon.Not.Roy.Astron.Soc.379:1302-1312,2007
Star-formation within galaxies appears on multiple scales, from spiral structure, to OB associations, to individual star clusters, and often sub-structure within these clusters. This multitude of scales calls for objective methods to find and classif
Externí odkaz:
http://arxiv.org/abs/0706.0495
Autor:
Efremov, Yu. N.
Most star complexes are in fact complexes of stars, clusters and gas clouds; term "star complexes" was introduced as general one disregarding the preferential content of a complex. Generally the high rate of star formation in a complex is accompanied
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512302