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261. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_3.pdf
... J.H. Hough , D.K. Aitken Department of Physical Sciences, University of Hertfordshire, HatЪeld AL10 9AB, UK Received 14 May 2002; accepted 5 August 2002 Abstract At near-infrared wavelengths many of the diagnostics familiar from imaging and spectropolarimetry in the optical and UV are extended to include regions su ering dust extinction and unobservable at shorter wavelengths, and for high-z objects many important spectral lines are shifted into the near-infrared. ... Optics of cosmic dust. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_3.pdf -- 629.5 Кб -- 19.11.2010
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262. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_3.pdf
... 352, 508ґ516 (1999) ASTRONOMY AND ASTROPHYSICS Circumstellar disc of Pictoris: constraints on grain properties from polarization ? N.V. Voshchinnikov1 and E. Krugel2 1 2 Sobolev Astronomical Institute, St. Petersburg University, Bibliotechnaya pl. ... We model the positional dependence of the optical scatterer and observer is essential. ... The particles are spherical, have a size distribution cumstellar disc of Pic is clear and simple. ... Fig. ... The polarization observed in the disc of Pic. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_3.pdf -- 887.5 Кб -- 19.11.2010
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263. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_1.pdf
... We calculate the radiation pressure force of a red giant acting on prolate and oblate spheroidal grains of different size, aspect ratio and chemical composition. ... The radiation pressure force is calculated for prolate and oblate spheroids of different semiaxes ratio, size and composition. ... Dust grains 2.2.1. ... Conclusions We have calculated the radiation pressure force acting on prolate and oblate spheroidal grains of different size, aspect ratio, chemical composition and alignment. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_1.pdf -- 779.8 Кб -- 19.11.2010
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264. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_2.pdf
A&A 385, 365ґ376 (2002) DOI: 10.1051/0004-6361:20020158 c ESO 2002 Astronomy & Astrophysics Multiple scattering of polarized radiation by non-spherical grains: First results S. Wolf1 , N. V. Voshchinnikov2 , and Th. ... We present the first numerical radiative transfer simulation of multiple light scattering in dust configurations containing aligned non-spherical (spheroidal) dust grains. ... Multiple scattering of polarized radiation by non-spherical grains Fig. ... Fig. ... Figs. 5a and 5b1). ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_2.pdf -- 448.1 Кб -- 19.11.2010
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265. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_1.pdf
... This technique allows the scattered light from the faint envelope to be separated from the glare of the bright central star, and is particularly well suited to this class of object. ... The distribution of scattered light in combination with its polarization (up to 40 per cent) provides unambiguous evidence for axisymmetry in 14 objects, showing this to be a common trait of PPNe. ... The polarized flux images shown in Fig. 4 reveal a bipolar geometry for the scattered light in 1809512704. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_1.pdf -- 826.9 Кб -- 19.11.2010
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266. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P6_5.pdf
POLARIMETRIC AND PHOTOMETRIC OBSERVATIONS OF SPLIT COMET C/2001 A2 (LINEAR) VERA ROSENBUSH1 , NIKOLAI KISELEV2 and SERGEY VELICHKO2 1 Main Astronomical Observatory of the National Academy of Sciences, 27 Zabolotny Street, 03680 Kyiv, Ukraine; 2 Institute of Astronomy, Kharkiv National University, 35 Sumskaya Street, 61022 Kharkiv, Ukraine (Received 8 March 2002; Accepted 29 June 2002) Abstract. ... Keywords: Comet C/2001 A2 (LINEAR), comets, dust, NH2 , polarization 1. ... First, it is a split comet. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P6_5.pdf -- 100.7 Кб -- 19.11.2010
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267. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_5.pdf
... 13 (2002) 249ґ255 PII: S0957-0233(02)27535-9 Light scattering by an elongated particle: spheroid versus infinite cylinder N V Voshchinnikov1 andVGFarafonov2 1 Sobolev Astronomical Institute, St Petersburg University, Universitetskii pr. ... A comparison of extinction efficiency factors of prolate spheroids and infinitely long circular cylinders is made. ... The simplest model of non-spherical particles--an infinitely long circular cylinder-- is not physically reasonable. ... Figure 5. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_5.pdf -- 415.5 Кб -- 19.11.2010
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268. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_1.pdf
... rensw=astro.uva.nl Received 2001 January 8 ; accepted 2001 July 18 ABSTRACT In order to study the inяuence and structure of the magnetic пeld in the early phases of low-mass star formation, we obtained polarization maps of three Bok globules at a wavelength of 850 km, using the Submillimeter Common-User Bolometer Array at the James Clerk Maxwell ... INTRODUCTION Magnetic пelds are an important factor in the star formation process (see, e.g., Greaves et al. ... DC 253[1.6 (CG 30 ; Zealey et...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_1.pdf -- 307.8 Кб -- 19.11.2010
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269. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_4.pdf
... At high optical depth, the e ect of dichroic extinction becomes more important, preferentially absorbing photons with a negative Q, and leading to a vector pattern dominated by positive Q. The Stokes U component is absorbed more than positive Q, so at high optical depth the vectors have an axial orientation, parallel to the magnetic Ъeld. ... However, at high optical depth dichroic extinction plays a prominent role in modifying the Stokes vector after scattering (Eqs. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_4.pdf -- 924.5 Кб -- 19.11.2010
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270. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P4_4.pdf
Вычисление параметрических производных поляризованного излучения и решение обратных задач атмосферной оптики С. А. Ухинов и Д. И. Юрков 14 апреля 2003 г. Институт Вычислительной Матаматики и Математической Геофизики СО РАН, Новосибирск, 630090, Россия Аннотация Авторами рассмотрены вопросы вычисления производных от параметров поляризованного солнечного излучения и вопросы решения обратных задач атмосферной оптики с использованием модифицированной двойной локальной ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P4_4.pdf -- 298.8 Кб -- 19.11.2010
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271. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_4.pdf
A A 395, 891ґ898 (2002) DOI: 10.1051/0004-6361:20021351 c ESO 2002 Astronomy Astrophysics Bispectrum speckle interferometry of the B[e] star MWC 349A K.-H. Hofmann1 , Y. Balega2 , N.R.Ikhsanov1 , 3 , A. S. Miroshnichenko1 1 2 3 4 ,3,4 , and G. Weigelt1 Max-Planck-Institut fur Radioastronomie ... Our diffraction-limited J -, H -, and K -band images (resolutions 43ґ74 mas) suggest the star is surrounded by a circumstellar disk seen almost edge-on. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_4.pdf -- 727.8 Кб -- 19.11.2010
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272. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_2.pdf
... Printed in U.S.A. CALCULATING CROSS SECTIONS OF COMPOSITE INTERSTELLAR GRAINS NIKOLAI V. VOSHCHINNIKOV1 AND JOHN S. MATHIS2 Received 1999 April 14 ; accepted 1999 July 7 ABSTRACT Interstellar grains may be composite collections of particles of distinct materials, including voids agglomerated together. We determine the various optical cross sections of such composite grains, given the optical properties of each constituent, using an approximate model of the composite grain. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_2.pdf -- 179.3 Кб -- 19.11.2010
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273. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_1.pdf
/0004-6361:20011562 c ESO 2002 Astronomy Astrophysics Bispectrum speckle interferometry of the massive protostellar object S140 IRS 1: Evidence for multiple outflows G. Weigelt1 , Y. Y. Balega2 , T. Preibisch1 , D. Schertl1 , and M. D. Smith 1 2 3 3 Max-Planck-Institut fur Radioastronomie, Auf ... Multiple outflows from S140 IRS 1 the arcs in our image, as we have demonstrated by fitting their morphologies with the predicted cavity shapes of the jet-driven outflow model. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_1.pdf -- 418.9 Кб -- 19.11.2010
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274. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_2.pdf
... We explore the structures immediately surrounding the intermediate-mass young stellar object R Mon with bispec- trum speckle interferometry, conventional near-infrared imaging and by analyzing optical HST archive data. Our near-infrared speckle images with unprecedented diffraction-limited resolution of 55 mas (44 AU; H -band) and 76 mas (61 AU; K -band) represent the highest resolution R Mon images obtained so far and exhibit previously unseen complex structures. ... The features 1ґ5 are marked. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P5_2.pdf -- 485.1 Кб -- 19.11.2010
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275. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_4.pdf
... 136, 405ґ406 (1999) APRIL II 1999, PAGE 405 WWW database of optical constants for astronomy Th. ... The database we announce contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants of the materials of astronomical interest: different silicates, ices, oxides, sulfides, carbides, carbonaceous species from amorphous carbon to graphite and diamonds, etc. ... 1998; Schnaiter et al. 1998). ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P3_4.pdf -- 116.5 Кб -- 19.11.2010
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276. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P7_5.pdf
Journal of Quantitative Spectroscopy & Radiative Transfer 79ґ80 (2003) 599 ґ 626 www.elsevier.com/locate/jqsrt Light scattering by multilayered nonspherical particles: a set of methods Victor G. Farafonova , Vladimir B. Il'inb ; , Marina S. Prokopjevab a St. Petersburg University of Aerocosmic Instrumentation, Bol. ... Situation with layered nonspherical particles is much more complex, despite many methods allow one to get solution to the corresponding light scattering problem. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P7_5.pdf -- 322.3 Кб -- 19.11.2010
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277. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_4.pdf
... The full wavelength-dependent problem is solved without any flux approximation, and for arbitrary scattering properties of the dust. ... Analyzing the properties of typical cosmic dust, we discuss the wavelength range for which the time-consuming solution on adaptive grids can be omitted. ... Adaptive photon transport grid for the scattered part of the radiation passing through a dust envelope with spherically symmetric density distribution, for the wavelength = 0.165 ?m. three outer -iterations. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_4.pdf -- 2162.9 Кб -- 19.11.2010
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278. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_3.pdf
Journal of Quantitative Spectroscopy Radiative Transfer 79ґ80 (2003) 765 ґ 774 www.elsevier.com/locate/jqsrt A database of optical constants of cosmic dust analogs Cornelia Jagera ; , Vladimir B. Il'inb , Thomas Henningc; a , Harald Mutschkea , Dirk Fabiana , Dmitry A. Semenova; b , ... Germany Received 31 May 2002; accepted 13 August 2002 Abstract We describe the current state and future of the WWW Jena-Petersburg database of optical ... WWW database of optical constants for astronomy. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P2_3.pdf -- 161.3 Кб -- 19.11.2010
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279. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P6_2.pdf
Planetary and Space Science 48 (2000) 1005-1009 www.elsevier.nl/locate/planspasci Anomalous wavelength dependence of polarization of Comet 21P= Giacobini-Zinner Nikolai N. Kiseleva , Klaus Jockersb ; , Vera. ... The uncommon spectral trend of polarization of Comet Giacobini-Zinner may be caused by a large content of organic matter in its dust or an overabundance of large particles as compared to the other comets. c 2000 Elsevier Science Ltd. ... Comet Giacobini-Zinner: a normal comet?. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P6_2.pdf -- 123.1 Кб -- 19.11.2010
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280. http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_5.pdf
... Results of angle-dependent scattering measurements on the Ъbres and on levitated crystals are presented, including phase functions, polarization properties and the asymmetry parameter. ... We present here results of angle-dependent light scattering measurements on the Ъbres and on levitated ice-like crystals, including phase functions and polarization properties. ... Laboratory measurements of light scattering by single levitated ice crystals. ... Microwave analog to light scattering measurements. ...
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Ссылки http://www.astro.spbu.ru/staff/ilin2/INTAS2/PAP/P1_5.pdf -- 986.5 Кб -- 19.11.2010
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