发布求助
文献互助 智能选刊 最新文献

Advances in Astrophysics最新文献

筛选
英文 中文
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
Periodic Orbits in the Photogravitational Elliptic Restricted Three-Body Problem 光引力椭圆型受限三体问题中的周期轨道
Advances in Astrophysics Pub Date : 2018-08-01 DOI: 10.22606/adap.2018.33004
Y. S. Ruth, R. Sharma
{"title":"Periodic Orbits in the Photogravitational Elliptic Restricted Three-Body Problem","authors":"Y. S. Ruth, R. Sharma","doi":"10.22606/adap.2018.33004","DOIUrl":"https://doi.org/10.22606/adap.2018.33004","url":null,"abstract":"Periodic orbits in the elliptic restricted three-body problem are studied by considering the photogravitational and oblateness effects of the larger and smaller primary, respectively. The mean motion is derived with the help of averaging the distance r between the primaries over a revolution in terms of the mean anomaly. Collinear points L1, L2, L3 are studied for some of the Sun and its planet systems. The value of the critical mass μc is found, which decreases with the increase in radiation pressure and oblateness. The stability of the triangular points is studied using the analytical technique of Bennett. This is based on Floquet's theory for determination of characteristic exponents for periodic coefficients. Transition curves bounding the regions of stability in the μ-e plane, accurate to O(e2) are generated. Tadpole orbits, a combination of long-short periodic orbits, are produced for Sun-Jupiter and Sun-Saturn systems.","PeriodicalId":131060,"journal":{"name":"Advances in Astrophysics","volume":"41 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":"116226862","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信