Advances in Astrophysics最新文献

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Quantised Inertia and Galaxy Rotation from Information Theory 信息论中的量子化惯性和星系旋转
Advances in Astrophysics Pub Date : 2020-11-02 DOI: 10.22606/ADAP.2020.54002
M. McCulloch
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引用次数: 0
Maxwell and Scalar Fields in Nonstandard Cosmology 非标准宇宙学中的麦克斯韦和标量场
Advances in Astrophysics Pub Date : 2020-05-02 DOI: 10.22606/adap.2020.52002
G. Scharf
{"title":"Maxwell and Scalar Fields in Nonstandard Cosmology","authors":"G. Scharf","doi":"10.22606/adap.2020.52002","DOIUrl":"https://doi.org/10.22606/adap.2020.52002","url":null,"abstract":": We study the scalar field equation and Maxwell equations in the nonstandard back-ground previously investigated. We separate the angular dependence by expanding in sphericalharmonics and solve the radial wave equations exactly by separating the variablestandr. Weobtain electric and magnetic multipole radiation as in vacuum without gravitation, but the fre-quencies get redshifted. The exact results are essential for understanding the Planckian characterof CMB properly. Abstract We study the scalar field equation and Maxwell equations in the nonstandard background previously investigated. We separate the angular dependence by expanding in spherical harmonics and solve the radial wave equations exactly by separating the variables t and r . We obtain electric and magnetic multipole radiation as in vacuum without gravitation, but the frequencies get redshifted. The exact results are essential for understanding the Planckian character of CMB properly.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133588724","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
Kordylewski Dust Clouds: Could They Be Cosmic “Superbrains”? 考迪列夫斯基尘埃云:它们可能是宇宙的“超级大脑”吗?
Advances in Astrophysics Pub Date : 2019-11-01 DOI: 10.22606/adap.2019.44001
R. Temple, C. Wickramasinghe
{"title":"Kordylewski Dust Clouds: Could They Be Cosmic “Superbrains”?","authors":"R. Temple, C. Wickramasinghe","doi":"10.22606/adap.2019.44001","DOIUrl":"https://doi.org/10.22606/adap.2019.44001","url":null,"abstract":"Recent astronomical observations combined with dynamical simulations have led to a possible confirmation of the existence of the much disputed stable dust clouds (Kordylewski Dust Clouds) at the Lagrange libration points of the Earth-Moon system. The new data leads to an estimate of the size of the cloud at L5 as well as of the average radii of the scattering/polarizing dust particles in the cloud’s interior. The diameter of the cloud is somewhat less than 3 times the Earth’s diameter, and the average grain radius is estimated at ~ 3  10-5cm, consistent with bacterial-type cells, with a mean separation of less than 1 cm. Such grains, most likely elongated on the average (rod-like bacteria), and photoelectrically charged to a few eV, would acquire a spin through collisions with gas atoms and thus could act as emitters and absorbers of longwave electromagnetic radiation. We speculate that the entire Kordylewski Dust Cloud comprised of such particles has the potential to acquire electromagnetic connectivity with an information storage/processing capacity akin to a form of intelligence.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130865955","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
Luminosity Function of Arakelian Galaxies and Their Environmental Dependences 阿拉克利星系的光度函数及其对环境的依赖性
Advances in Astrophysics Pub Date : 2019-08-01 DOI: 10.22606/adap.2019.43004
A. P. Mahtessian, Armenia Nas Ra V. Ambartsumian Byurakan Astrophysical Observatory, V. Movsisyan, L. A. Mahtessian, G. Karapetian
{"title":"Luminosity Function of Arakelian Galaxies and Their Environmental Dependences","authors":"A. P. Mahtessian, Armenia Nas Ra V. Ambartsumian Byurakan Astrophysical Observatory, V. Movsisyan, L. A. Mahtessian, G. Karapetian","doi":"10.22606/adap.2019.43004","DOIUrl":"https://doi.org/10.22606/adap.2019.43004","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115093074","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
A Robotic Camera for Monitoring Meteors Entering the Earth’s Atmosphere near the Equator 用于监测在赤道附近进入地球大气层的流星的机器人摄像机
Advances in Astrophysics Pub Date : 2019-08-01 DOI: 10.22606/adap.2019.43002
H. Amaradasa, G. Mahanama, S. Abeywickrama, A. Alahakoon, K.P.S.C. Jayarathna, N. Wickramasinghe
{"title":"A Robotic Camera for Monitoring Meteors Entering the Earth’s Atmosphere near the Equator","authors":"H. Amaradasa, G. Mahanama, S. Abeywickrama, A. Alahakoon, K.P.S.C. Jayarathna, N. Wickramasinghe","doi":"10.22606/adap.2019.43002","DOIUrl":"https://doi.org/10.22606/adap.2019.43002","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121628477","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
The Computational Cosmic Brain 计算型宇宙大脑
Advances in Astrophysics Pub Date : 2019-08-01 DOI: 10.22606/ADAP.2019.43001
I. Ginsburg, M. Lingam, Merrill Butler
{"title":"The Computational Cosmic Brain","authors":"I. Ginsburg, M. Lingam, Merrill Butler","doi":"10.22606/ADAP.2019.43001","DOIUrl":"https://doi.org/10.22606/ADAP.2019.43001","url":null,"abstract":"The cosmic web exhibits some striking similarities to that of an animal brain. Despite its tremendous size the cosmos is many orders of magnitude less efficient at computation than the brains residing in Earth’s biosphere. This shows just how information-rich life truly is.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115299041","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
Ouamuamua (A/2017U1), Panspermia, and Intelligent Life in the Universe Ouamuamua (A/2017U1),宇宙中的生源论和智慧生命
Advances in Astrophysics Pub Date : 2019-08-01 DOI: 10.22606/adap.2019.43005
N. Wickramasinghe, D. Wickramasinghe, E. Steele
{"title":"Ouamuamua (A/2017U1), Panspermia, and Intelligent Life in the Universe","authors":"N. Wickramasinghe, D. Wickramasinghe, E. Steele","doi":"10.22606/adap.2019.43005","DOIUrl":"https://doi.org/10.22606/adap.2019.43005","url":null,"abstract":"We examine a range of arguments relating to the existence of extraterrestrial life and the possible distribution of intelligent life in the galaxy. It has recently been reported that the object (Ouamuamua (A/2017U1)) that transited the solar system in a hyperbolic orbit exhibits certain features that cannot be readily explained on the basis of it being a naturally-occurring comet or asteroid. The interesting conjecture by Bialy and Loeb that Ouamuamua (A/2017U1) could be an artificial construct of an alien civilization is re-examined. The possibility that Ouamuamua may be a dark cometary body, in which unobserved gaseous emissions may have led to departures from a Keplerian orbit, remains a more conservative alternative possibility. We discuss the implications of the discovery of light sails or similar artifacts, as proposed by Bialy and Loeb, in relation to the validity of galaxy-wide panspermia and the prevalence of life throughout the universe.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"166 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115714626","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
Toward Autonomous Navigation of Spacecraft on the Observed Periodic Radiation of Pulsars 基于脉冲星周期辐射观测的航天器自主导航研究
Advances in Astrophysics Pub Date : 2019-05-31 DOI: 10.22606/ADAP.2019.42002
A. Avramenko, B. Losovsky
{"title":"Toward Autonomous Navigation of Spacecraft on the Observed Periodic Radiation of Pulsars","authors":"A. Avramenko, B. Losovsky","doi":"10.22606/ADAP.2019.42002","DOIUrl":"https://doi.org/10.22606/ADAP.2019.42002","url":null,"abstract":"The analytical coupling of the Doppler shift of the periodic pulsar radiation with the motion parameters of the observer in any chosen coordinate frame is shown. The motion parameters and the deviation of the spacecraft from the calculated position are associated with the Doppler shift of radiation of the pulsar. According to the coherent radiation of the pulsar in space and time, due to stable rotation parameters, the uniform physical time scales, invariant in any coordinate frame, including on-board, is formed. In the orthogonal coordinate system with axes beginning at the center of mass of the spacecraft and non-rotating axes relative to the barycenter of the Solar system, the projections of the radius vector and spacecraft deflection velocity in the direction of the pulsar are obtained. According to the observed rotation parameters of the pulsar, which are not correlated with its movement, inertial coordinate reference systems are synchronized by the criterion of invariance of analytical pulsar time scales in each of them. As an illustration, the decade data on the timing of the pulsar B0531+21 determined its own position and movement with an estimated accuracy within about 10 m and 10-1–10-2 m/s, respectively, with the subnanosecond resolution of the measured intervals and corresponded distances.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115452848","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
Red Rain Cells of Kerala as a Possible Carrier of the Diffuse Interstellar Bands and the UV Extinction Bump 喀拉拉邦的红雨细胞可能是漫射星际带和紫外线消光隆起的载体
Advances in Astrophysics Pub Date : 2019-05-31 DOI: 10.22606/ADAP.2019.42003
A. S. Kumar, N. Wickramasinghe, G. Louis
{"title":"Red Rain Cells of Kerala as a Possible Carrier of the Diffuse Interstellar Bands and the UV Extinction Bump","authors":"A. S. Kumar, N. Wickramasinghe, G. Louis","doi":"10.22606/ADAP.2019.42003","DOIUrl":"https://doi.org/10.22606/ADAP.2019.42003","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115348957","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
Periods in Solar Activity 太阳活动周期
Advances in Astrophysics Pub Date : 2019-05-31 DOI: 10.22606/ADAP.2019.42001
Amy L. Potrzeba-Macrina, I. Zurbenko
{"title":"Periods in Solar Activity","authors":"Amy L. Potrzeba-Macrina, I. Zurbenko","doi":"10.22606/ADAP.2019.42001","DOIUrl":"https://doi.org/10.22606/ADAP.2019.42001","url":null,"abstract":"Solar activity has a well-known periodicity of approximately 10-11 years, an oscillation that was first observed in China several thousand years ago. The purpose of this paper is to explain the driving force behind this periodicity and to explain other periodicities inherent to solar activities. In science, spectral analysis is an essential tool used for the identification of periodicities that are natural to a given dataset. In this paper the authors use spectral analysis to investigate planetary gravitational periods to explain periodicities of sunspot numbers and to make conclusions about the driving force of the sunspot numbers and solar activity. Precise analysis of inherent periodicities provides the capability to predict future fluctuations in solar activities. The authors show clear evidence of long periodicities within sunspot numbers. The combination of several periodic components, while complex, remains perfectly predictable. The authors show that the long-term component of sunspot fluctuations is perfectly proportional to the total solar irradiation near Earth measured by satellites. While satellite measurements of the total solar irradiance cover a short time interval, sunspot numbers have been recorded for a long time and essentially have more value on the prediction of solar influence on Earth’s climate. This allows for the numerical evaluation of solar energy delivered to Earth. Numerical evaluations of fluctuations in solar energies delivered to Earth are an essential achievement for any climate change analysis. The removal of solar influences from long-term temperature data provides the opportunity to numerically identify the human impact on Earth’s climate. A better understanding and prediction of the Sun’s long oscillations may influence important predictions of climatic events and impact emergency preparedness.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133204400","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: 3
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