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Perturbation Theory in Nonstandard Cosmology 非标准宇宙学中的微扰理论
Advances in Astrophysics Pub Date : 2019-04-30 DOI: 10.22606/adap.2019.44002
G. Scharf
{"title":"Perturbation Theory in Nonstandard Cosmology","authors":"G. Scharf","doi":"10.22606/adap.2019.44002","DOIUrl":"https://doi.org/10.22606/adap.2019.44002","url":null,"abstract":"We study inhomogeneous perturbations away from the strongly homogeneous background cosmology previously studied. The problem is greatly simplified by using the mapping on the inner Schwarzschild solution. The resulting linear perturbation equations can be solved by power series. The solution leads to a finite energy density, but the pressure must be zero.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125256052","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: 4
Nonlocal Theory of Ball Lightning 球状闪电的非定域理论
Advances in Astrophysics Pub Date : 2019-02-20 DOI: 10.22606/ADAP.2019.41002
B. Alexeev
{"title":"Nonlocal Theory of Ball Lightning","authors":"B. Alexeev","doi":"10.22606/ADAP.2019.41002","DOIUrl":"https://doi.org/10.22606/ADAP.2019.41002","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123452600","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
An Alternative Description of the Schwarzschild Black Hole 史瓦西黑洞的另一种描述
Advances in Astrophysics Pub Date : 2019-02-20 DOI: 10.22606/adap.2019.41003
Y. Zayko
{"title":"An Alternative Description of the Schwarzschild Black Hole","authors":"Y. Zayko","doi":"10.22606/adap.2019.41003","DOIUrl":"https://doi.org/10.22606/adap.2019.41003","url":null,"abstract":"The article gives the metric of the Schwarzschild black hole, consistent with the fact that the electromagnetic vacuum is unstable under its horizon. A similar metric was previously obtained in the author's work when studying the dynamics of a vortex. This metric is characterized by the absence of many familiar concepts intrinsic to hyperbolic space-time: light-like geodesics, light cone, etc. The thermodynamic aspect of this black hole model is also considered.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123392038","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
Raman and Infrared Spectroscopic Tentative Identification of Organic Traces in Sadiya (LL5) Ordinary Chondrite Sadiya (LL5)普通球粒陨石中有机痕迹的拉曼和红外光谱初步鉴定
Advances in Astrophysics Pub Date : 2018-11-01 DOI: 10.22606/ADAP.2018.34004
B. Saikia, G. Parthasarathy, R. R. Borah
{"title":"Raman and Infrared Spectroscopic Tentative Identification of Organic Traces in Sadiya (LL5) Ordinary Chondrite","authors":"B. Saikia, G. Parthasarathy, R. R. Borah","doi":"10.22606/ADAP.2018.34004","DOIUrl":"https://doi.org/10.22606/ADAP.2018.34004","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126658490","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 Natural Changes of Solar-Terrestrial Relations 日地关系的自然变化
Advances in Astrophysics Pub Date : 2018-11-01 DOI: 10.22606/ADAP.2018.34001
G. Y. Smolkov
{"title":"The Natural Changes of Solar-Terrestrial Relations","authors":"G. Y. Smolkov","doi":"10.22606/ADAP.2018.34001","DOIUrl":"https://doi.org/10.22606/ADAP.2018.34001","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125954518","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
A Lognormal Luminosity Function for SWIRE in Flat Cosmology 平面宇宙论中SWIRE的对数正态光度函数
Advances in Astrophysics Pub Date : 2018-11-01 DOI: 10.22606/adap.2018.34003
L. Zaninetti
{"title":"A Lognormal Luminosity Function for SWIRE in Flat Cosmology","authors":"L. Zaninetti","doi":"10.22606/adap.2018.34003","DOIUrl":"https://doi.org/10.22606/adap.2018.34003","url":null,"abstract":"The evaluation of the physical parameters or effects such as the luminosity function (LF) or the photometric maximum (PM) for galaxies is routinely modeled by their spectroscopic redshift. Here, we model LF and PM for galaxies by the photometric redshift as given by the Spitzer Wide-Area Infrared Extragalactic (SWIRE) catalog in the framework of a lognormal LF. In addition, we compare our model with the Schechter LF for galaxies. The adopted cosmological framework is that of the flat cosmology.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116982174","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
Confirmation of Microbial Ingress from Space 确认微生物从太空进入
Advances in Astrophysics Pub Date : 2018-11-01 DOI: 10.22606/ADAP.2018.34006
N. Wickramasinghe, M. Rycroft, D. Wickramasinghe, D. Wallis, R. Temple, G. Tokoro, A. Syroeshkin, T. Grebennikova, O. Tsygankov, Millington Road Cambridge Cb Hw Uk. Caesar Consultancy, Moscow Russian Federation Microbiology named Gamalei, Korolev Rocket
{"title":"Confirmation of Microbial Ingress from Space","authors":"N. Wickramasinghe, M. Rycroft, D. Wickramasinghe, D. Wallis, R. Temple, G. Tokoro, A. Syroeshkin, T. Grebennikova, O. Tsygankov, Millington Road Cambridge Cb Hw Uk. Caesar Consultancy, Moscow Russian Federation Microbiology named Gamalei, Korolev Rocket","doi":"10.22606/ADAP.2018.34006","DOIUrl":"https://doi.org/10.22606/ADAP.2018.34006","url":null,"abstract":"The discovery by Russian researchers (Grebennikova et al., 2018) of microorganisms on the exterior surface of the International Space Station (ISS) on several occasions between 2013 and 2017 may be interpreted as evidence supporting the Hoyle-Wickramasinghe theory of cometary panspermia. The homologies between the ISS-recovered genotypes and known terrestrial bacteria can be seen as evidence of co-evolution and gene transfers (HGT) within a biosphere that spans astronomical distances. On the one hand, the height of the ISS orbit at 400km can be argued as being too high for lofting surface microorganisms. However, there is a theory that purports to explain the possible transport of small particles from the troposphere into the lower stratosphere and ionosphere as a result of vortex motions as well as vertical flows (streamers), which are generated as a result of the development of the modulational instability in the ionospheric plasma. More research is needed to properly evaluate this proposal.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129678094","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
The Modulation of a Dust Ion-Acoustic Wave in a Collisional Dusty Plasma 碰撞尘埃等离子体中尘埃离子声波的调制
Advances in Astrophysics Pub Date : 2018-08-01 DOI: 10.22606/ADAP.2018.33005
A. Paul, G. Mandal, A. Mamun, M. Amin
{"title":"The Modulation of a Dust Ion-Acoustic Wave in a Collisional Dusty Plasma","authors":"A. Paul, G. Mandal, A. Mamun, M. Amin","doi":"10.22606/ADAP.2018.33005","DOIUrl":"https://doi.org/10.22606/ADAP.2018.33005","url":null,"abstract":"","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124951384","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
On the Difficulty of the Transport of Electrically Charged Submicron Dust from the Earth’s Surface to the High Ionosphere 带电亚微米尘埃从地球表面向高层电离层传输的困难
Advances in Astrophysics Pub Date : 2018-08-01 DOI: 10.22606/ADAP.2018.33003
N. Wickramasinghe, Michael J. Rycrof, Millington Road Cambridge Cb Hw Uk. Caesar Consultancy
{"title":"On the Difficulty of the Transport of Electrically Charged Submicron Dust from the Earth’s Surface to the High Ionosphere","authors":"N. Wickramasinghe, Michael J. Rycrof, Millington Road Cambridge Cb Hw Uk. Caesar Consultancy","doi":"10.22606/ADAP.2018.33003","DOIUrl":"https://doi.org/10.22606/ADAP.2018.33003","url":null,"abstract":"The transport of electrically charged bacterial-sized dust particles from the stratosphere to the high ionosphere is discussed. With the maximum electric field associated with the Global Electric Circuit during both active thunderstorm and fair weather conditions, we show that electric forces are inadequate to overcome gravity in lofting dust particles from the stratosphere to heights of ~ 400 km in the ionosphere, where they have recently been discovered at the orbit of the International Space Station.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122504919","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: 7
Quantum Electron-acoustic Envelope Solitons and Their Modulational Instability in a Degenerate Quantum Plasma 简并量子等离子体中的量子电子-声学包络孤子及其调制不稳定性
Advances in Astrophysics Pub Date : 2018-08-01 DOI: 10.22606/ADAP.2018.33006
Foisal B. T. Siddiki, Abdullah Al Mamun, M. Amin
{"title":"Quantum Electron-acoustic Envelope Solitons and Their Modulational Instability in a Degenerate Quantum Plasma","authors":"Foisal B. T. Siddiki, Abdullah Al Mamun, M. Amin","doi":"10.22606/ADAP.2018.33006","DOIUrl":"https://doi.org/10.22606/ADAP.2018.33006","url":null,"abstract":"The basic features of linear and nonlinear quantum electron-acoustic (QEA) waves in a degenerate quantum plasma (containing non-relativistically degenerate electrons, superthermal or κ-distributed electrons, and stationary ions) are theoretically investigated. The nonlinear Schödinger (NLS) equation is derived by employing the reductive perturbation method. The stationary solitonic solution of the NLS equation is obtained, and examined analytically as well as numerically to identify the basic features of the QEA envelope solitons. It has been found that the effects of the degeneracy and exchange/Bohm potentials of cold electrons, and superthermality of hot electrons significantly modify the basic properties of linear and nonlinear QEA waves. It is observed that the QEA waves are modulationally unstable for k < kc, where kc is the maximum (critical) value of the QEA wave number k below which the QEA waves are modulationally unstable), and that for k < kc the solution of the NLS equation gives rise to the bright envelope solitons, which are found to be localized in both spatial (ξ) and time (τ) axes. It is also observed that as the spectral index κ is increased, the critical value of the wave number (amplitude of the QEA envelope bright solitons) decreases (increases). The implications of our results should be useful in understanding the localized electrostatic perturbation in solid density plasma produced by irradiating metals by intense laser, semiconductor devices, microelectronics, etc.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117181981","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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