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Pulsar diffractive scintillation at 1.4 and 4.8GHz 脉冲星在1.4和4.8GHz的衍射闪烁
Astronomical and Astrophysical Transactions Pub Date : 2007-12-13 DOI: 10.1080/10556790701614755
V. Malofeev, O. Malov, W. Sieber, A. Jessner, S. Tyul'Bashev, B. Klein, R. Wielebinski
{"title":"Pulsar diffractive scintillation at 1.4 and 4.8GHz","authors":"V. Malofeev, O. Malov, W. Sieber, A. Jessner, S. Tyul'Bashev, B. Klein, R. Wielebinski","doi":"10.1080/10556790701614755","DOIUrl":"https://doi.org/10.1080/10556790701614755","url":null,"abstract":"Abstract The diffractive interstellar scintillation of 11 pulsars at 1410 MHz and of five pulsars at 4800 MHz was analysed to estimate the spectrum of the electron density fluctuations as well as the ACF, CCF and the structure function. We present dynamic spectra for a few pulsars at high frequencies in the strong and weak regime and show that a lensing effect probably exists for pulsar PSR B2020+28 at 1410 MHz. The mean value of the indexes of the power law spectra for an ensemble of pulsars is in good agreement with a Kolmogorov spectrum.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"123 1","pages":"549-556"},"PeriodicalIF":0.0,"publicationDate":"2007-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79475792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical conditions in compact details of core-dominated sources 核控制源的紧凑细节的物理条件
Astronomical and Astrophysical Transactions Pub Date : 2007-12-13 DOI: 10.1080/10556790701610332
S. Tyul'Bashev
{"title":"Physical conditions in compact details of core-dominated sources","authors":"S. Tyul'Bashev","doi":"10.1080/10556790701610332","DOIUrl":"https://doi.org/10.1080/10556790701610332","url":null,"abstract":"Spectra are built for compact details of core-dominated sources. Seventy-seven compact details in sources have cut-offs in the spectrum. The estimates of physical parameters are made for them. By far, the majority of details show evidence of the equipartition between densities of energy of the magnetic field and relativistic particles. The constructed relationship between the density of energy of the magnetic field and the density of energy of the relativistic particles has not any satisfactory explanation for the present moment.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"31 1","pages":"663-669"},"PeriodicalIF":0.0,"publicationDate":"2007-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78665263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Distribution of turbulent plasma in the galaxy 湍流等离子体在星系中的分布
Astronomical and Astrophysical Transactions Pub Date : 2007-12-13 DOI: 10.1080/10556790701610514
A. V. Pynzar’
{"title":"Distribution of turbulent plasma in the galaxy","authors":"A. V. Pynzar’","doi":"10.1080/10556790701610514","DOIUrl":"https://doi.org/10.1080/10556790701610514","url":null,"abstract":"It is shown that the level of plasma turbulence strongly depends on a direction in the Galaxy. It is obtained that there are nearly three orders of magnitude larger in the directions of the central portions of the Galaxy at low latitudes IbI 10°. In the galactic arms the highest values of level of turbulence are near supernova remnants located in the regions with large electron densities. We show that the typical radius of the strong turbulence region around supernova remnants is ≅ 35 pc. Within this region the level of plasma turbulence is approximately 10 times larger, than on its edges. It is concluded that presence of supernova explosions in the medium with large density is necessary for existence of strong turbulence in interstellar plasma.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"61 1","pages":"605-609"},"PeriodicalIF":0.0,"publicationDate":"2007-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83927099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Antikythera mechanism: who was its creator and what was its use and purpose? 安提基西拉机制:谁是它的创造者，它的用途和目的是什么?
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790601136925
Antonios D. Pinotsis
{"title":"The Antikythera mechanism: who was its creator and what was its use and purpose?","authors":"Antonios D. Pinotsis","doi":"10.1080/10556790601136925","DOIUrl":"https://doi.org/10.1080/10556790601136925","url":null,"abstract":"We first give an account of the discovery of the Antikythera treasure, which was found by Symian sponge divers in November 1900. Among other finds was the Antikythera mechanism, which is the ancient mechanism of the highest level of sophistication among the mechanisms that have been found until now and is considered as the highest technology mechanism in antiquity. We have included in our account information from recent literature. We also give a description of this mechanism and its function, use and purpose. Finally, we present some scientific arguments in favour of our suggestion that the creator of the Antikythera mechanism was Posidonius of Rhodes.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"11 1","pages":"211-226"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10556790601136925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72388866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Gravity anomalies in the Earth's crust and upper mantle 地壳和上地幔的重力异常
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790701594999
N. A. Chujkova, L. P. Nasonova, T. Maximova
{"title":"Gravity anomalies in the Earth's crust and upper mantle","authors":"N. A. Chujkova, L. P. Nasonova, T. Maximova","doi":"10.1080/10556790701594999","DOIUrl":"https://doi.org/10.1080/10556790701594999","url":null,"abstract":"The contribution to the Earth external and internal gravity field from isostatically equilibrated masses of relief, density jumps on Moho boundary and anomalous masses of crust and upper mantle of the Earth in linear and quadratic approximation is found. Significant gravity anomalies are revealed in isostatically equilibrated crust and mantle, which can lead to gravitational and dynamic instability. The deviation of the external field of the Earth in isostatic equilibrium from observations demonstrates the disturbance of isostatic equilibrium in Earth.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"11 1","pages":"391-399"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78263978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
The elastic energy of rotational and lunisolar tides and their role in the Earth's seismic activity 旋转和日月潮汐的弹性能量及其在地球地震活动中的作用
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790601017224
Y. Barkin, J. Ferrándiz, M. Ferrandez, J. F. Navarro
{"title":"The elastic energy of rotational and lunisolar tides and their role in the Earth's seismic activity","authors":"Y. Barkin, J. Ferrándiz, M. Ferrandez, J. F. Navarro","doi":"10.1080/10556790601017224","DOIUrl":"https://doi.org/10.1080/10556790601017224","url":null,"abstract":"An analytical expression for the elastic energy of the planet tidal deformations induced by external celestial bodies and by the rotational motion of the planet has been obtained. It was shown that the elastic energy is not the additive sum of the elastic energies of rotation and the corresponding planet–perturbing body pairs but contains additional terms of mutual character. Previously we have obtained a formula for the elastic energy of superposition of the lunisolar tides which also contains additional terms of mutual character caused by the mutual influence of the Moon and the Sun. In this paper we have obtained new mutual terms caused by the combination of the rotational deformations of the planet and by lunisolar tides. These additional terms are more significant and determine the main variations in the global tension state of the Earth. With various degrees of detail, we have looked at the variations in this energy in the last few decades, and also for a hundred years into the future. The peak exci...","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"94 1","pages":"163-198"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80581807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
X-ray emission properties from Circinus X-1 Circinus X-1的x射线发射特性
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790601156709
V. V. Fidelis
{"title":"X-ray emission properties from Circinus X-1","authors":"V. V. Fidelis","doi":"10.1080/10556790601156709","DOIUrl":"https://doi.org/10.1080/10556790601156709","url":null,"abstract":"The X-ray activity of Circinus X-1, a periodically flaring source, was studied using observational data from the all-sky monitor onboard the Rossi X-ray Timing Explorer orbital observatory in the 2–12 keV energy band. The cross-correlation analysis of the 1 day averaged data set obtained in 2001 has confirmed the fundamental 16.6 day orbital period. The variability pattern of source emission in September–November 2005 has a complicated structure that may be explained by X-ray emission pressure on the accretion disc and periodically ejected matter. The spectral analysis of X-ray emission has revealed the source behaviour in high- and low-activity states that may be caused by differential absorption of emission by the dynamically changed environment in a close binary system.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"88 1","pages":"235-239"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86485902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The broad emission lines in the active galactic nucleus Fairall 9 在活动星系核Fairall 9的宽发射线
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790701685615
L. S. Nazarova, N. Bochkarev, P. O'Brien
{"title":"The broad emission lines in the active galactic nucleus Fairall 9","authors":"L. S. Nazarova, N. Bochkarev, P. O'Brien","doi":"10.1080/10556790701685615","DOIUrl":"https://doi.org/10.1080/10556790701685615","url":null,"abstract":"This paper reports on a study of UV and optical spectra of the active galaxy Fairall 9 taken as a part of the International AGN Watch database. CIV/Lyα, Lyα/Hs and Hα/Hs ratios have been measured at different radial velocities, which are varied across the line profiles. The ratio Lyα/Hs is low in the low-velocity centre of the lines, but increases a little in the high-velocity wings. The CIV/Lα and Hα/Hs line intensities ratios, however, are high at the line centre but become low in the wings. Modelling with the photoionization code CLOUDY shows that the observed line ratios can be described by two systems of clouds. One corresponds to the high-ionization line zone (HIL) with an electron density, ne∼ 108−10 cm−3. It is presumably located above the accretion disk or in the jets. The other system corresponds to the low-ionization line zone (LIL), which is probably a part of the accretion disk and which has a higher electron density, ne∼ 1012−13 cm−3. The possible geometry of the BLR in Fairall 9 is discussed.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"22 1","pages":"401-408"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85624075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
0836+710. High quality ground and VSOP images 0836 + 710。高质量的地面和VSOP图像
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790701592167
A. Chuprikov
{"title":"0836+710. High quality ground and VSOP images","authors":"A. Chuprikov","doi":"10.1080/10556790701592167","DOIUrl":"https://doi.org/10.1080/10556790701592167","url":null,"abstract":"Some results from the processing of data of two Very Long Baseline Interferometry (VLBI) observations of well-known quasar 0836+710 are presented. This source demonstrates a big parsec-scale jet with reach structure in S (2300 MHz), C (4980 MHz), and X (8400 MHz) frequency bands and has been included into the Japanese mission titled VSOP (VLBI Space Orbital Program) as well as into the future Russian mission titled ‘RADIOASTRON’ source listing. The radio images presented here illustrate some interesting properties of radio structure of 0836+710. The processing of data has been carried out with the software ‘Astro Space Locator’ (ASL for Windows).","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"113 1","pages":"371-378"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73704135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anomalies of an external and internal gravitational field of upper Earth layers in square law approximation 地球上层内外引力场的平方定律近似异常
Astronomical and Astrophysical Transactions Pub Date : 2007-10-01 DOI: 10.1080/10556790701592134
L. P. Nasonova, N. A. Chujkova
{"title":"Anomalies of an external and internal gravitational field of upper Earth layers in square law approximation","authors":"L. P. Nasonova, N. A. Chujkova","doi":"10.1080/10556790701592134","DOIUrl":"https://doi.org/10.1080/10556790701592134","url":null,"abstract":"The explicit form for the quadratic contribution to the gravitational field from the dipole distributed anomalous masses is found. The anomalous masses are represented in the form of layers of variable height, arranged relative to the reference ellipsoid. The solution is reduced to the mathematical problem of finding an expression for the coefficients of expansion in terms of spherical harmonics of the square of any function that can be presented as a finite series of spherical harmonics, in terms of the coefficients of this initial series. The formulas have been calculated using mathematical modelling of symbol computation using computer algebra packages. The results obtained are illustrated using the example of the contribution from relief masses and density jumps on the Mohorovicic (Moho) discontinuity.","PeriodicalId":52135,"journal":{"name":"Astronomical and Astrophysical Transactions","volume":"26 1","pages":"361-369"},"PeriodicalIF":0.0,"publicationDate":"2007-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81223714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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