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21. http://sn.sai.msu.ru/~sil/preprints/iau245sil.pdf
... Panoramic spectroscopy of the sample of 80 nearby lenticular galaxies is presented. ... By comparing the subsample of the S0s with the chemically distinct nuclei to the total sample of nearby S0s (Fig. 1), we have assured that the chemically distinct nuclei are always younger than the surrounding bulges: the mean age difference between the chemically distinct nuclei and their surrounding bulges is 2.8 Gyr while the age difference between the nuclei and the bulges for the whole sample is only 1 Gyr. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/iau245sil.pdf -- 195.3 Кб -- 23.01.2010
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22. http://sn.sai.msu.ru/~sil/preprints/iau254sil.pdf
The Galaxy Disk in Cosmological Context Proceedings IAU Symposium No. ... The presence of exponential bulges and anti-truncated disks has been noticed in many lenticular galaxies. ... Among our findings in unbarred spiral galaxies, only one galaxy, NGC 5533, has a LSB outer disk (Sil'chenko et al. ... In the frame of this model, the Exponential bulges and antitruncated disks 5 inner disk must be more bright and compact than the usual large-scale stellar disks of spiral galaxies are. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/iau254sil.pdf -- 285.3 Кб -- 23.01.2010
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23. http://sn.sai.msu.ru/~sil/preprints/al75.pdf
... 35, No. 2, pp. 87ґ99. i Star Formation History in the Central Region of the Barred Galaxy NGC 4245 O. K. Sil'chenko1* , I. V. Chilingarian1, 2 , and V. L. Afanasiev 1 2 3 Sternberg Astronomical Institute, Universitetskii pr. ... The galaxy has been found to possess a pronounced chemically decoupled compact stellar nucleus, which is at least a factor of 2.5 richer in metals than the stellar population of the bulge, and a ring of young stars with a radius of 300 pc. ... NGC 4245. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/al75.pdf -- 885.0 Кб -- 23.01.2010
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24. http://sn.sai.msu.ru/~sil/preprints/apj_694_2_1550.pdf
... Printed in the U.S.A. TWO MORE DISK GALAXIES WITH GLOBAL GAS COUNTERROTATION O. K. Sil'chenko1 ,2 , A. V. Moiseev3 , and V. L. Afanasiev3 3 Sternberg Astronomical Institute, Moscow, 119991 ... @sao.ru Received 2008 October 10; accepted 2009 January 1; published 2009 March 25 1 ABSTRACT We report a discovery of extended counterrotating gaseous disks in early-type disk galaxies NGC 2551 and NGC 5631 ... 2, 2009 TWO MORE DISK GALAXIES WITH GLOBAL GAS COUNTERROTATION 1553 Figure 2. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/apj_694_2_1550.pdf -- 608.7 Кб -- 23.01.2010
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25. http://sn.sai.msu.ru/~sil/preprints/ar1101.pdf
... 86, No. 12, pp. 1163ґ1178. i Structure of the Galaxies of the NGC 80 Group : Two-Tiered Disks M. A. Startseva1 , O. K. Sil'chenko1 , and A. V. Moiseev 1 2 Sternberg Astronomical Institute, Moscow State University, Moscow, ... photometric data obtained on the 6-m telescope of the Special Astrophysical Observatory are used to analyze the structure of 13 large disk galaxies in the NGC 80 group ... All the large lenticular galaxies have two-tiered exponential disks and exponential Є...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/ar1101.pdf -- 1785.8 Кб -- 23.01.2010
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26. http://sn.sai.msu.ru/~sil/preprints/sil_pulk.pdf
... What are mechanisms of secular evolution? ... Internal mechanisms of secular evolution may b e: Ї bar instabilities in dynamically cold disk galaxies , Ї deviations from circular rotation due to non-axisymmetric gravitation p otential effect which may b e produced by planar structures ... gravitational and energetic, effects of nuclear sup ermassive black holes ґ they may provoke as attraction as well expansion, Ї certain gas expansion by galactic winds and fountains, etc ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/sil_pulk.pdf -- 438.5 Кб -- 24.01.2008
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27. http://sn.sai.msu.ru/~sil/preprints/leo2_atr.pdf
... 13, Moscow 119991, Russia їUK Astronomy Data Centre, Guest Investigator (Received 20 June 2007) The kinematics, structure, and stellar population properties in the centres of two brightest early-type galaxies of the Leo II group, NGC 3607 and NGC 3608, are studied by means of integral-field spectroscopy. ... Figure 1. ... Chemically decoupled cores in NGC 3607 and NGC 3608 3.1 NGC 3607 Figure 3 presents index maps for the central part of NGC 3607 constructed from the MPFS 2D spectral data. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/leo2_atr.pdf -- 1675.5 Кб -- 24.01.2008
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28. http://sn.sai.msu.ru/~sil/preprints/ic3653.pdf
... Soc. 376, 1033ґ1046 (2007) doi:10.1111/j.1365-2966.2007.11549.x Kinematics and stellar populations of the dwarf elliptical galaxy IC 3653 I. V. Chilingarian,1 1 2 ,2,3 P. Prugniel, 2,4 O. K. Sil'chenko1 and V. L. Afanasiev 5 Sternberg Astronomical Institute of the Moscow State University, Universitetsky pr. ... Fitting the spectra with synthetic single stellar populations (SSP), we found an SSPequivalent age of 5 Gyr and nearly solar metallicity [Fe/H] =-0.06 dex. ... 2007 The Authors. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/ic3653.pdf -- 1492.4 Кб -- 24.01.2008
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29. http://sn.sai.msu.ru/~sil/preprints/al292.pdf
... 33, No. 5, pp. 332ґ339. i Young Nuclei in Dwarf Elliptical Galaxies I. V. Chilingarian1, 1 2 2 ** , O. K. Sil'chenko1, V. L. Afanasiev2 , and Ph. ... In all three galaxies, the luminosity-weighted age of the nuclei (4 Gyr) is considerably younger than that of the population in the outer regions of the galaxies. ... Kinematically decoupled structures associated with a young metal-rich stellar population can be formed precisely through a dissipative merger of gas-rich galaxies several Gyr ago. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/al292.pdf -- 636.1 Кб -- 24.01.2008
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30. http://sn.sai.msu.ru/~sil/preprints/aa6758-06.pdf
A&A 467, 991ґ1001 (2007) DOI: 10.1051/0004-6361:20066758 c ESO 2007 Astronomy & Astrophysics Metallicity and age gradients in round elliptical galaxies M. Baes1 , O. K. Sil'chenko2,3 ,A.V. Moiseev4 , and E. A. Manakova2 1 2 3 4 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, 9000 Gent, Belgium Sternberg Astronomical Institute, University av. ... We probe the stellar population age and metallicity distributions in nearby elliptical galaxies over the largest extension to date. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/aa6758-06.pdf -- 1898.0 Кб -- 24.01.2008
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31. http://sn.sai.msu.ru/~sil/preprints/al534.pdf
... 32, No. 8, pp. 592ґ603. i Central Regions of the Early-Type Galaxies in the NGC 3169 Group O. K. Sil'chenko1* and V. L. Afanasiev 1 2 Sternberg Astronomical Institute, Universitetskii pr. ... The mean age of the stellar populations in the centers of all three galaxies has been found to be approximately the same, 1 Gyr. ... In contrast, in NGC 3166, there is a metallicity gradient, but the stellar age remains approximately constant up to a distance of 8 from the center. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/al534.pdf -- 740.1 Кб -- 04.10.2006
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32. http://sn.sai.msu.ru/~sil/preprints/62782.ps
... Four types of galaxy environments are considered: clusters, centers of groups, other places in groups, and the field. ... In order to check whether the mean ages of the stellar populations depend on environment density monotonically, as the hierarchical parґ adigm predicts, in this work I consider four types of environment separately: the cluster galaxies, the brightest (central ) galaxies of groups, the secondґranked group members, and the field galaxies. ... Group center SB(rs)0# 204 637 1996 Oct ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/62782.ps -- 1434.0 Кб -- 04.10.2006
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33. http://sn.sai.msu.ru/~sil/preprints/204780.pdf
... Printed in U.S.A. NATURE OF NUCLEAR RINGS IN UNBARRED GALAXIES : NGC 7742 AND NGC 7217 O. K. Sil'chenko and A. V. Moiseev Special Astrophysical Observatory, Nizhnij Arkhyz 369167, Russia; moisav@sao.ru Received 2005 ... Isaac Newton Institute of Chile, Moscow Branch, Moscow 119992, Russia; olga@sai.msu.su ABSTRACT We have studied an unbarred Sb galaxy with a nuclear star-forming ring, NGC ... 1 7217, Pos. ... Left: Stellar velocity dispersion map for NGC 7217 according to the SAURON...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/204780.pdf -- 614.0 Кб -- 04.10.2006
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34. http://sn.sai.msu.ru/~sil/preprints/leo3.pdf
... The kinematics, structure, and stellar population properties in the centers of two early-type spiral galaxies of the Leo Triplet, NGC 3627 and NGC 3623, are studied by means of integral-field spectroscopy. ... In the center of NGC 3627 we observe noticeable gas radial motions, and the stars and the ionized gas in the center of NGC 3623 demonstrate more or less stable rotation. ... In this work we consider two nearby early-type spiral galaxies belonging to the famous Leo Triplet, NGC 3623 and NGC...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/leo3.pdf -- 470.1 Кб -- 04.10.2005
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35. http://sn.sai.msu.ru/~sil/preprints/al227.pdf
... Chemically Decoupled Nuclei in Five Lenticular Galaxies from SAURON Data O. K. Sil'chenko* Sternberg Astronomical Institute, Universitetski i pr. ... We have now analyzed and published the SAURON data for five galaxies, including the above NGC 3384 and NGC 3623, in which the chemically decoupled nuclei are rather extended (several hundred parsecs) circumnuclear stellar disks. ... 1996 SAURON, Oct. ... In NGC 7280, we found an inner polar ring previously using MPFS data (Afanasiev and Sil'chenko 2000...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/al227.pdf -- 790.6 Кб -- 05.04.2005
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36. http://sn.sai.msu.ru/~sil/preprints/postbr2.pdf
... All the galaxies are divided into 4 groups depending on the environment type; every subsample contains more than 10 galaxies. ... An effect of environments is seen both for the nuclei and for the bulges: if we consider the clusters (Virgo and Ursa Ma jor) and group centers as dense environments and the field and group periphery as sparse environments, then in the dense environments the stellar populations of S0s are in average older by 4ґ5 Gyr than in the sparse ones. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/postbr2.pdf -- 85.0 Кб -- 01.12.2004
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37. http://sn.sai.msu.ru/~sil/preprints/postbr1.pdf
... The circumnuclear GASEOUS disks are often decoupled from the circumnuclear stellar disks and are even stronger inclined to the outer disk planes; in fact, we have found a considerable `population' of inner polar rings. Inner gas polar rings are found as in spiral galaxies with the massive outer gas disks co-planar to the main symmetry planes (e.g. NGC 2841, Sil'chenko et al. 1997, and NGC 7217, Sil'chenko & Afanasiev 2000) as well in many lenticular galaxies (Fig. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/postbr1.pdf -- 76.8 Кб -- 01.12.2004
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38. http://sn.sai.msu.ru/~sil/preprints/203546.ps.gz
INNER POLAR RINGS REGULAR LENTICULAR GALAXIES 1 K. Sil'chenko 2 Sternberg Astronomical Institute, 119992 Moscow, Russia; Isaac Newton Institute Chile, Moscow Branch; olga@sai.msu.su Afanasiev Special Astrophysical Observatory, 369167 Nizhnij Arkhyz, Russia; vafan@sao.ru Received 2003 December accepted February 4 ABSTRACT have investigated a sample of galaxies, mostly with circumnuclear dust lanes orthogonal their major axes, chosen from Hubble Space Telescope Wide Field Planetary Camera 2 images. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/203546.ps.gz -- 901.0 Кб -- 05.05.2004
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39. http://sn.sai.msu.ru/~sil/preprints/n80eng.pdf
... The Chemically Distinct Nucleus and Structure of the S0 Galaxy NGC 80 O. K. Sil'chenko1, S. E. Koposov1, V. V. Vlasyuk2, and O. I. Spiridonova 1 2 2 Sternberg Astronomical Institute, Universitetski i pr. ... The global stellar disk of NGC 80 has a two-tiered structure: its outer part has an exponential scale length of 11 kpc and normal surface density, while the inner disk, which is also exponential and axisymmetric, is more compact and brighter. ... 29, 1997 July 18, 2001 July 18, 2001 Aug. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/n80eng.pdf -- 249.0 Кб -- 23.12.2003
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40. http://sn.sai.msu.ru/~sil/preprints/n80.pdf
2003, 80, 2, . 107-117 524.7-8 S0- NGC 80 c 2003 . ... NGC 759 . ... 0.69 0.69 0.69 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 0.27 з 0.37 109 . ... 80 2 NGC 80 - 2001 . ... NGC 80, ( ), : 2* 2003 116 . ... Astrophys. ... Astron. ... O. K. Sil'chenko, Astron. and Astrophys. ... O. K. Sil'chenko, Astron. ... V. V. Vlasyuk and O. K. Sil'chenko, Astron. and Astrophys. ... O. K. Sil'chenko and V. L. Afanasiev, Astron. and Astrophys. ...
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Ссылки http://sn.sai.msu.ru/~sil/preprints/n80.pdf -- 250.7 Кб -- 06.02.2003
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