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Correction to: Electromagnetic Radiation from a Relativistic Jet Induced by a Plane Gravitational Wave 修正：由平面引力波引起的相对论性射流的电磁辐射
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-09-13 DOI: 10.1007/s10511-025-09877-y
V. Epp, K. Osetrin, E. Osetrina
{"title":"Correction to: Electromagnetic Radiation from a Relativistic Jet Induced by a Plane Gravitational Wave","authors":"V. Epp, K. Osetrin, E. Osetrina","doi":"10.1007/s10511-025-09877-y","DOIUrl":"10.1007/s10511-025-09877-y","url":null,"abstract":"","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"324 - 324"},"PeriodicalIF":0.7,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to: Induced Electromagnetic Radiation from a Charged Cloud in a Plane Gravitational Wave 修正：平面引力波中带电云的感应电磁辐射
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-09-13 DOI: 10.1007/s10511-025-09878-x
V. Epp, K. Osetrin
{"title":"Correction to: Induced Electromagnetic Radiation from a Charged Cloud in a Plane Gravitational Wave","authors":"V. Epp, K. Osetrin","doi":"10.1007/s10511-025-09878-x","DOIUrl":"10.1007/s10511-025-09878-x","url":null,"abstract":"","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"325 - 325"},"PeriodicalIF":0.7,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction to: A Cosmological Model with Second Law of Thermodynamics in f(R, T) Gravity 修正：f（R， T）重力下热力学第二定律的宇宙学模型
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-30 DOI: 10.1007/s10511-025-09876-z
R. K. Tiwari, J. Bharali, B. Chetry, A. Beesham
{"title":"Correction to: A Cosmological Model with Second Law of Thermodynamics in f(R, T) Gravity","authors":"R. K. Tiwari, J. Bharali, B. Chetry, A. Beesham","doi":"10.1007/s10511-025-09876-z","DOIUrl":"10.1007/s10511-025-09876-z","url":null,"abstract":"","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"323 - 323"},"PeriodicalIF":0.7,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Plane-Symmetric Universe in the Presence of String Clouds Coupled with the Perfect Fluid in f(R,T) Gravity 弦云与f（R，T）引力下的完美流体耦合的平面对称宇宙
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-28 DOI: 10.1007/s10511-025-09874-1
R. G. Kandarkar, V. A. Thakare
{"title":"Plane-Symmetric Universe in the Presence of String Clouds Coupled with the Perfect Fluid in f(R,T) Gravity","authors":"R. G. Kandarkar,&nbsp;V. A. Thakare","doi":"10.1007/s10511-025-09874-1","DOIUrl":"10.1007/s10511-025-09874-1","url":null,"abstract":"<p>In this study, we considered plane-symmetric space-time in the presence of string clouds coupled with perfect fluid in<i> f</i> (<i>R</i>, <i>T</i>) theory of gravitation. Here, <i>R</i> is the Ricci scalar and <i>T</i> is the torsion scalar of space-time. The simple functional forms of the function <i>f</i> (<i>T</i>), such <i>f</i> (<i>R</i>, T) = <i>R +</i> 2<i>f</i> (<i>T</i>) is chosen for the investigation. Exact solutions of the field equations were obtained by considering the average scale factor. Different types of strings are discussed. Different forms of energy conditions are considered to obtain the exact solution of the nonlinear field equation. The following parameters were studied: i) average scale factor (<i>t</i><sup>2</sup> <i>+</i> λ/μ)<sup>1/2μ</sup> ii) shear scalar σ, iii) expansion scalar θ and iv) deceleration parameter <i>q</i>. Some of the physical and geometrical features of the model are represented using graphs.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"290 - 309"},"PeriodicalIF":0.7,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effective Potentials in General Scalar-Tensor Theories of Gravity 广义引力标量张量理论中的有效势
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-28 DOI: 10.1007/s10511-025-09870-5
A. A. Saharian, G. H. Harutyunyan, H. K. Teryan, R. M. Avagyan
{"title":"Effective Potentials in General Scalar-Tensor Theories of Gravity","authors":"A. A. Saharian,&nbsp;G. H. Harutyunyan,&nbsp;H. K. Teryan,&nbsp;R. M. Avagyan","doi":"10.1007/s10511-025-09870-5","DOIUrl":"10.1007/s10511-025-09870-5","url":null,"abstract":"<p>We consider general scalar-tensor theories in (D +1)-dimensional spacetime. The interplay between the Jordan and Einstein frame representations is explored. As a specific illustration of the general frame-work, we examine higher-dimensional generalizations of the Jordan-Brans-Dicke theory, theories with non-minimally coupled scalar fields, f (R) gravity and low-energy string effective gravity. The properties of the Einstein frame scalar field effective potentials are discussed.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"212 - 227"},"PeriodicalIF":0.7,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Study on Geodesics and Lifespan of the Rindler-Modified Schwarzschild Black Hole. II. Null Geodesics and Black Hole Lifespan rindler修正史瓦西黑洞的测地线和寿命研究。2。零测地线和黑洞寿命
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-28 DOI: 10.1007/s10511-025-09871-4
T. Huo, C. Liu
{"title":"A Study on Geodesics and Lifespan of the Rindler-Modified Schwarzschild Black Hole. II. Null Geodesics and Black Hole Lifespan","authors":"T. Huo,&nbsp;C. Liu","doi":"10.1007/s10511-025-09871-4","DOIUrl":"10.1007/s10511-025-09871-4","url":null,"abstract":"<p>This paper is the second part of \"A study on geodesics and lifespan of the Rindler-modified Schwarzschild black hole\" [1] where we have investigated the time-like geodesics in the Rindler-modified Schwarzschild black hole (RMSBH) spacetime. In this part, we continue to study the null geodesics around the RMSBH. Based on this, we further explore the lifespan of the black hole. For the radial null geodesics, the relationship between the coordinate distance and the coordinate time is obtained. In addition, the expressions for the radius of the circular orbit formed by photons around the RMSBH and the impact parameter of the null geodesics are also derived. Meanwhile, we calculate the deflection angle of light rays grazing around the RMSBH and find that the cosmological constant does not affect the deflection angle of photons passing by the black hole, but the Rindler acceleration will reduce the deflection angle. In the thermodynamics part, our primary focus is on the radiation lifespan of the black hole. Our calculations reveal that both the Rindler acceleration and the cosmological constant can reduce the lifespan of the black hole.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"228 - 248"},"PeriodicalIF":0.7,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of Bouncing Universe in Gauss-Bonnet Theory of Gravity 高斯-庞内引力理论中的弹跳宇宙动力学
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-26 DOI: 10.1007/s10511-025-09873-2
M. Vijaya Santhi, K. Santosh Rupa
{"title":"Dynamics of Bouncing Universe in Gauss-Bonnet Theory of Gravity","authors":"M. Vijaya Santhi,&nbsp;K. Santosh Rupa","doi":"10.1007/s10511-025-09873-2","DOIUrl":"10.1007/s10511-025-09873-2","url":null,"abstract":"<p>This manuscript’s primary object is to investigate and study the anisotropic universe in terms of <i>f</i> (<i>G</i>) gravity. Kantowski-Sachs spacetime is considered for this evolution, in a modified theory of gravity. The exact solutions of modified theory field equations are investigated using a viable <i>f</i> (<i>G</i>) model choice. We considered two bouncing scenarios described by exponential and power law scale factors, these non-singular bouncing models also accommodate a transition cosmic acceleration phenomenon. Specific significant cosmological parameters are estimated and discussed for the obtained models.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"269 - 289"},"PeriodicalIF":0.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of Periodic Cosmic Evolution in Modified f(Q, T) Gravity Theory 修正f（Q， T）引力理论中宇宙周期演化的研究
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-26 DOI: 10.1007/s10511-025-09872-3
A. R. Lalke, G. P. Singh, B. K. Bishi
{"title":"Study of Periodic Cosmic Evolution in Modified f(Q, T) Gravity Theory","authors":"A. R. Lalke,&nbsp;G. P. Singh,&nbsp;B. K. Bishi","doi":"10.1007/s10511-025-09872-3","DOIUrl":"10.1007/s10511-025-09872-3","url":null,"abstract":"<p>Finding a completely promising theory of gravitation that urges us to go beyond the general theory of relativity. One such approach is an extended class of symmetric teleparallel theory of gravity, namely <i>f</i> (<i>Q, T</i> ) gravity. In this work, we have explored the cosmological background of the flat FLRW universe within the framework of this theory. The cosmic transit phenomenon of the deceleration parameter is studied by employing periodic varying deceleration parameter and obtaining the exact solution of the highly non-linear field equations. The periodic scenario of cosmological models with two different Lagrangian forms of <i>f</i> (<i>Q, T</i> ) is analyzed, where the first form is linear and the second one is non-linear dependent on <i>Q</i>. The dynamical features of both the models, including the periodic behavior of the equation of state parameter are discussed. The self-stability and self-consistency of the derived models are tested by studying energy conditions. Additionally, the geometrical diagnostic validation of the model is also checked.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"249 - 268"},"PeriodicalIF":0.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lie Series Solution for Photogravitational Elliptic Restricted Three Body Problem 光引力椭圆型受限三体问题的李级数解
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-26 DOI: 10.1007/s10511-025-09875-0
A. Chakraborty, R. R. Dewangan, M. D. Pandey
{"title":"Lie Series Solution for Photogravitational Elliptic Restricted Three Body Problem","authors":"A. Chakraborty,&nbsp;R. R. Dewangan,&nbsp;M. D. Pandey","doi":"10.1007/s10511-025-09875-0","DOIUrl":"10.1007/s10511-025-09875-0","url":null,"abstract":"<p>In this paper we have undertaken the study of systems with both radiating primaries in the frame work of elliptic restricted three body problem where the orbits of the two massive bodies about each other is assumed to be elliptic and the mass of the third body is negligible. In order to determine the problem's solution, we expand the formulation of the iterative expression for the Lie series terms. The impact of the primaries' radiation pressure on the orbit is depicted graphically in the Lie series solution of triangular equilibrium point <i>L</i><sub>4</sub>.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"310 - 322"},"PeriodicalIF":0.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interstellar Polarisation Towards a Region Around the Bok Globule B5 朝向博克球状体B5周围区域的星际偏振
IF 0.7 4区 物理与天体物理
Astrophysics Pub Date : 2025-08-19 DOI: 10.1007/s10511-025-09868-z
H. A. Krayani, V. B. Il’in
{"title":"Interstellar Polarisation Towards a Region Around the Bok Globule B5","authors":"H. A. Krayani,&nbsp;V. B. Il’in","doi":"10.1007/s10511-025-09868-z","DOIUrl":"10.1007/s10511-025-09868-z","url":null,"abstract":"<p>We report the results of our spectroscopic and polarimetric observations of 2° × 2° field around the globule Barnard 5 (B5) belonging to the Perseus cloud complex at the distance d ≈ 300 pc. Using these data, two-dimensional spectral classification was made for about 45 stars. Multi-band polarimetry of about 20 of these stars allowed us to find the parameters (P<sub>max</sub>, λ<sub>max</sub>) of interstellar polarization. Using the Gaia parallaxes and data from the recent photometric surveys, we estimate the interstellar extinction A<sub>V</sub> towards the stars. Our analysis of à variations of the parameters A<sub>V</sub>, P<sub>max</sub>, λ<sub>max</sub> in the sky plane and with the distance allows us to conclude that in the considered field (excluding the halo of B5) the main contribution to the extinction and polarization is provided by an extension of the Taurus cloud complex (TMC) at d ≈ 150 pc, and that the derived values of the parameters indicate that the angle between the line of sight and the magnetic field direction in this part of TMC significantly differs from 90°.</p>","PeriodicalId":479,"journal":{"name":"Astrophysics","volume":"68 2","pages":"177 - 194"},"PeriodicalIF":0.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145128742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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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