... SHTOL ' Special Astrophysical Observatory of the Russian AS, Nizhnij Arkhyz 357147, Russia The investigation of such a phenomenon as the magnetic field variability at long times (years - decennials) is very interesting. If the explanation of the magnetic field variability with rotation period by the oblique rotator model is evident, then the reason of the long-period variability is not clear yet, despite the existence of some assumptions on its nature. ... Fig.2. ... 213 Fig.3. ...

... 458 ­ 461 Magnetic Variability of the Ap Star HD 9996 Bychkov V. D.1 , Bychkova L. V.1 , Madej J.2 , Shatilov A. V.1 1 2 Special Astrophysical Observatory, Nizhny Arkhyz, Russia Warsaw University Observatory, Poland Abstract. ... Its phase magnetic curve exhibits two components. ... 1 Long­Perio d Magnetic Phase Curve Compilation of early photometric measurements of HD 9996 allowed us to constrain the corresponding period P in the range of 7750 < Pph < 8550 days (Pyper & Adelman, 1986). ...

We present the results of an extensive observing campaign on the O7.5 III star xi Persei. The UV observations were obtained with the International Ultraviolet Explorer. xi Per was monitored continuously in October 1994 during 10 days at ultraviolet and visual wavelengths. The ground-based optical observations include magnetic field measurements, HЮБ and He I lambda 6678 spectra, and were partially covered by photometry and polarimetry. ...

... The Search of a pulsar Once the dedispersed time series is obtained, a Fourier transformation is performed. ... 2 Binary parameters The orbit of a pulsar , as well as any object, in a binary system is determined in its geometrical characteristics, space displacement and syncronised in time by the following parameters : Semimajor axis Eccentricity Longitude of periastron Binary period Time of ascending node a e PB T0 True spin period and observed spin period The ...

... The accuracy of calculation of both INTERBALL spacecraft (SC) motion has been estimated at the IKI. ... The 30 days measuring intervals were used during the Tail probe (TP) orbital data treatment, and 15 days intervals - during the Auroral probe (AP) orbit determination. ... http://www.iki.rssi.ru/vprokhor/indap.htm for the Auroral probe; . http://www.iki.rssi.ru/vprokhor/indtp.htm for the Tail probe . ... http://www.iki.rssi.ru/vprokhor/ssc.htm , or http://www.iki.rssi.ru/vprokhor/amisan.htm . ...

... Several attempts to discover the FICN signal in VLBI nutation series made during last years failed. ... We investigated several VLBI CPO series by means of spectral and wavelet analysis. It has been shown that there are several periodic signals with close amplitude around the expected FICN period without any prevailing one that can be reliably associated with the FICN. ... DATA ANALYSIS We analyzed several CPO series obtained in IVS analysis centers by means of spectral and wavelet analysis. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... The top two plots show our new B data phased with our best fit period, superimposed on the polynomial fits of Manfroid Mathys (2000) to their larger B dataset (green dashed curve). In the top panel the second, slightly different, B curve (red dash-dotted line) is the variation of B predicted by our adopted field geometry. ... The bottom figure depicts the Bz field variations observed in HD 318107. ...

... The evolution equation presented above indicates that an accreting compact star must endeavor to attain an equilibrium state in which the resultant torque vanishes (Davidson and Ostriker, 1973[ 38 ]; Lipunov and Shakura, 1976[ 109 ]). ... Let us turn to the case of disk accretion. ... Since , the equilibrium period in the case of disk accretion is close to the critical period, , separating accretion stage A and the propeller stage P . ...

... 13, Moscow 119992, Russian Federation, e-mail: busarev@sai.msu.ru; 2 Research Institute Crimean Astrophysical Observatory, p/o Nauchnyi, Crimea 334413, Ukraine, e-mail: prok@crao.crimea.ua Summary: We propose a combined method of astronomical investigations of small or distant planets incorporating registration of a set of integral spectra of an object and their frequency analysis. ... An application of the method is shown on example of asteroid 21 Lutetia. ... 6] Busarev V. V. (2002), Solar Sys. ...

... Experimental base . ... The experimental base of the investigations is the topside sounding data obtained on board of the Intercosmos-19 and Cosmos-1809 satellites. ... It carried on board the following scientific payload: satellite ionospheric station for radio sounding of ionosphere (IS-338) and apparatus for the measurements of low-frequency electromagnetic field (VLF-2ME), electric component of high-frequency field (AHF-2K), electron temperature (KM-3), and spectrometer of photoelectrons (SF3-M)...

spaceweb@oulu.fi - last update: 13 September 1998, 1130 UT (RR) . Ground based magnetometer measurements are used to derive several indices that describe magnetic activity in the Earth 's environment. aa , AE , Ak(Hel) , Kp , Dst , PC , MT . ... AE index is an auroral electrojet index obtained from a number (usually greater than 10) of stations distributed in local time in the latitude region that is typical of the northern hemisphere auroral zone (Davis and Sugiura, 1966). ...

Peremennye Zvezdy", . ... Epoch(max): . ... The variability of ST UMi was discovered by V.P. Goranskij and announced by Veremchuk (1982). It was found to be an RRAB star varying between 14 m .0 and 15 m .8 (pg), with the light elements Max hel = 2444074.380 + 0 d .5317771 x E, from plates of the Moscow collection (JD 2443026 2444261). ... Light Curve . ... The O C diagram plotted using the light elements from Veremchuk (1982). ... See text for light elements used to plot each of the light curves. ...

... Astrophysics Group . ... COAST . COAST Astronomical Results . ... Surface Imaging of Betelgeuse . ... This page highlights some astronomical results obtained with COAST over the years. These are listed in chronological order (most recent first). ... Measurements of cyclic variations in the angular diameter of Chi Cygni . ... The first infrared image from an aperture synthesis array . ... The images of Betelgeuse below were reconstructed from COAST data taken in early 2004. ...

The database contains references to the papers, data files and links to the Internet resources related to measurements and calculations of the optical constants in the wavelength interval from X-rays to radio domain. ... References to some useful books and reviews on the subject (e.g. the classical handbooks edited by E.D.Palik) and links to Internet collections of optical constants and personal WWW pages with related software were also placed in the database. You have arrived at our welcome page. ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

... 8, ``Celestial Mechanics'', 2002 FCN -- period dependence on dynamic characteristics of a lunar core A. Gusev 1 , N. Petrova 1 , N. Kawano 2 , and RISE group 2 1 Kazan State University, Kazan, Russia 2 National Astronomical Observatory, Mizusawa, Iwate, Japan Two modes in a polar oscillation are obtained when a free rotation of the two--layer Moon was studied: 1 PCW = 2\Omega A Am p fffi ё 1 74yr 1 P FCN = \ Gamma \Omega A 2Am ` C c \ ...

THE STUDY OF A MAGNETIC FIELD STRUCTURE IN BLAZAR JETS BY OPTICAL PHOTOPOLARIMETRIC DATA Yu.S. Efimov 1 , E.Yu. ... Besides the Faraday rotation of polarization plane there are observational param­ eters which are connected directly with the intensity of magnetic field and its structure: a polarization degree and a spectral index. ... Moreover, such a comparison allows to follow the variations of the magnetic field intensity from observed variations of polarization degree and spectral index. ...

The Laboratory of Electronic Kinetics ( LEK ) has powerful radio-frequency, microwave , cryogenic and high- magnetic - field sets of equipment , allowing to carry out precision phase-sensitive measurements of current and voltage in a frequency range 0-10 MHz and the microwave response of crystalline materials in cm-and mm- wavelength range in the temperature interval (0.1-300) K and in magnetic fields up to 18 T. Methodical principle of ... Magnetic field up to 18 T . ... Equipment . ...

. Секция «Солнце» . Предварительная повестка дня . Пятница,   29 мая . 14:00–14:15 А. И. Подгорный, И.М. Подгорный.   Солнечная вспышки – модель и сравнение с наблюдениями. 14:15–14:30   Ю .В. Думин , Б.В. Сомов. Топологическое инициирование быстрого магнитного пересоединения . 14:30–14:45 П.А.   Грицык ,   Б.В. Сомов. Модель толстой мишени с обратным током и современные наблюдения солнечных вспышек. 14:45–15:00 Н.П.   Колесников, С.И. Безродных, Б.В. Сомов. Расчет течений плазмы в приближении сильного

RUSSIAN ACADEMY OF SCIENCES NATIONAL GEOPHYSICAL COMMITTEE MATERIALS OF THE WORLD DATA CENTER B E.T. MATVEYEVA Catalogue of geomagnetic pulsations of Pc1 type on observation data at observatory Borok filial of UIPhE RAS 1957 -1992 Э.Т.МAТВЕЕВА Каталог геомагнитных пульсаций типа Pc1 (жемчужин) по данным наблюдений геофизической обсерватории Борок филиала ОИФЗ РАН за 1957-1992 г.г. Preface The ... C?- traces of Pc1. ... The Borok data given in [4] are included in the catalogue. ...