Astrophysics and Space Science最新文献_第4页

Solar orbiter: a short review of the mission and early science results 太阳轨道器：对任务和早期科学成果的简短回顾

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-02-05 DOI: 10.1007/s10509-025-04400-3

Louise Harra, Daniel Müller

{"title":"Solar orbiter: a short review of the mission and early science results","authors":"Louise Harra, Daniel Müller","doi":"10.1007/s10509-025-04400-3","DOIUrl":"10.1007/s10509-025-04400-3","url":null,"abstract":"<div><p>On 9 February 2020 at 11:03 pm EST, an Atlas V 411 rocket launched the ESA/ NASA Solar Orbiter mission. This mission was the culmination of decades of work across many countries to achieve the goal of getting close to the Sun and measuring how the Sun creates and maintains the heliosphere. The mission’s goal is to understand how the inner heliosphere works and how solar activity impacts it. The spacecraft achieves this with a specially designed highly elliptical orbit that gets close to the Sun twice a year. It reaches as close as 0.28 au requiring a novel heat shield to protect the instruments from the intense heat (the front side of the heat shield reaches around 500 <sup>∘</sup>C at this location). There are ten scientific instruments onboard: Six remote-sensing instruments observe solar activity across the electromagnetic spectrum on small and large scales, including imaging the source regions of the solar wind. They are accompanied by four in-situ instruments to probe the properties of the solar wind as it flows past the spacecraft. This review paper describes a selection of results from Solar Orbiter during its cruise phase and the beginning of its nominal scientific operations phase, and looks towards the next phases of the mission, when the spacecraft leaves the ecliptic plane to observe the solar poles for the first time.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"370 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10509-025-04400-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143184792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mergers of compact objects with cores of massive stars: evolutionary pathways, r-process nucleosynthesis and multi-messenger signatures 致密天体与大质量恒星核心的合并：进化途径，r-过程核合成和多信使特征

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-02-04 DOI: 10.1007/s10509-025-04402-1

Aldana Grichener

{"title":"Mergers of compact objects with cores of massive stars: evolutionary pathways, r-process nucleosynthesis and multi-messenger signatures","authors":"Aldana Grichener","doi":"10.1007/s10509-025-04402-1","DOIUrl":"10.1007/s10509-025-04402-1","url":null,"abstract":"<div><p>The study of massive binary systems has steadily progressed over the past decades, with increasing focus on their evolution, interactions and mergers, driven by improvements in computational modelling and observational techniques. In particular, when a binary system involves a massive giant and a neutron star (NS) or a black hole (BH) that go through common envelope evolution (CEE), it might result in the merger of the compact object with the core of its giant companion, giving rise to various high energy astrophysical phenomena. We review the different evolutionary channels that lead to compact object-core mergers, key physical processes with emphasis on the role of accretion physics, feasibility of r-process nucleosynthesis, expected observable electromagnetic, neutrino and gravitational-wave (GW) signatures, as well as potential correlation with detected core collapse supernovae (CCSNe), luminous fast blue optical transients (LFBOTs) and low luminosity long gamma-ray bursts (LGRBs). After presenting our current understanding of these mergers, we conclude discussing prospects for future advancements.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"370 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108631","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

Model-independent gamma-ray bursts constraints on cosmological models using machine learning 使用机器学习的宇宙学模型中独立于模型的伽马射线暴约束

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-31 DOI: 10.1007/s10509-025-04401-2

Bin Zhang, Huifeng Wang, Xiaodong Nong, GuangZhen Wang, Puxun Wu, Nan Liang

引用次数: 0

An efficient approximation method for nonlinear singular value problems arising in astrophysics: an operational matrix approach 天体物理学中非线性奇异值问题的一种有效逼近方法：运算矩阵法

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-29 DOI: 10.1007/s10509-025-04399-7

G. Hariharan, J. Kavitha, R. Seethalakshmi, H. Jafari

引用次数: 0

SDSS-IV MaNGA: the environmental effects on some fundamental properties of early-type galaxies SDSS-IV MaNGA：环境对早期型星系一些基本性质的影响

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-27 DOI: 10.1007/s10509-025-04396-w

E. Abdellah, R. M. Samir, Z. Awad, M. Y. Amin

{"title":"SDSS-IV MaNGA: the environmental effects on some fundamental properties of early-type galaxies","authors":"E. Abdellah, R. M. Samir, Z. Awad, M. Y. Amin","doi":"10.1007/s10509-025-04396-w","DOIUrl":"10.1007/s10509-025-04396-w","url":null,"abstract":"<div><p>We studied the dependence of selected structural and kinematic properties of early-type galaxies (ETGs) on their environments. The selected sample, extracted from the SDSS-DR17 MaNGA survey, consists of 946 ETGs in clusters (cETGs) and 288 isolated ETGs (iETGs) within a spectroscopic redshift <span>(zleq 0.15)</span>. We investigated the distribution of these galaxies in the Fundamental Plane (FP), Kormendy Relation (KR), Faber-Jackson Relation (FJR) and the Mass-Size Relation (MSR). We found that massive galaxies, whose stellar masses <span>(M_{*}> 10^{11}M_{odot })</span>, are predominantly elliptical (<span>(>65%)</span>). The analysis of the four scaling relations showed that the effect of the host environment is negligible for massive (<span>(M_{*}>10^{11.5}M_{odot })</span>) ETGs, most likely because of their passive evolution through dry mergers and/or stellar aging. On the other hand, low-mass ETGs are influenced by their environment, where iETGs with <span>(M_{*}<10^{10}M_{odot })</span> and velocity dispersion <span>(sigma _{0}leq 100)</span> km/sec are <span>(25%)</span> more luminous and <span>(11.5%)</span> larger than cETGs. Low-mass cETGs may have suffered processes that removed their gas content and hence quenched star formation while low-mass iETGs may have experienced a recent wet merger that triggered star formation and led to their, currently, observed low mass-to-light ratio. However, further spectral analysis is needed to confirm these findings.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"370 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109337","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

Time-lag in hadronic channel: to explore delayed VHE-flare of 3C 279 强子通道的时间滞后：探讨3C 279的延迟vhe耀斑

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-27 DOI: 10.1007/s10509-025-04398-8

Sunanda, Reetanjali Moharana

引用次数: 0

EFT calculations of (S_{34}(E)) for the (^{3}H(alpha ,gamma )^{7}Li) radiative capture reaction (^{3}H(alpha ,gamma )^{7}Li)辐射俘获反应(S_{34}(E))的EFT计算

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-24 DOI: 10.1007/s10509-024-04385-5

H. Sadeghi, M. Khoddam

引用次数: 0

The shape of magnetic hole in affecting electron distribution function and wave properties 磁孔的形状影响电子分布函数和波的性质

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-21 DOI: 10.1007/s10509-025-04397-9

Z. Y. Xu, H. S. Fu, Y. Yu, Z. Wang, W. D. Fu, W. Z. Zhang, J. B. Cao

{"title":"The shape of magnetic hole in affecting electron distribution function and wave properties","authors":"Z. Y. Xu, H. S. Fu, Y. Yu, Z. Wang, W. D. Fu, W. Z. Zhang, J. B. Cao","doi":"10.1007/s10509-025-04397-9","DOIUrl":"10.1007/s10509-025-04397-9","url":null,"abstract":"<div><p>Magnetic holes (MHs) have been widely observed in astrophysical and space plasmas. However, due to the lack of reconstruction method, the effects of MH shape on electron distribution function and wave properties are still unclear. In this study, we report a series of MHs in Earth’s magnetotail. We particularly focus on two of them with the clearest data features, reconstruct their topologies using the Second-Order Taylor Expansion (SOTE) method, and find their shapes to be bulging and deflated. Comparatively, the bulging MH exhibits a donut electron distribution, which may be attributed to the combined effects of internal expansion-induced betatron cooling and boundary contraction-induced betatron acceleration, while the deflated MH presents a pancake electron distribution. The beam instability and temperature anisotropy inside the bulging MH also excite electron cyclotron waves and whistler waves, respectively, while the deflated MH does not exhibit these types of waves. All these findings help us understand the geometric properties and evolutions of MHs.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"370 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994907","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

Dispersion relations of relativistic radiation hydrodynamics 相对论辐射流体力学的色散关系

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-15 DOI: 10.1007/s10509-025-04395-x

Lorenzo Gavassino

引用次数: 0

Dust acoustic soliton and shock structures with consequence of head-on collision in multi-component unmagnetized plasmas 多分量非磁化等离子体中正面碰撞产生的尘埃声孤子和激波结构

IF 1.8 4区物理与天体物理

Astrophysics and Space Science Pub Date : 2025-01-13 DOI: 10.1007/s10509-024-04392-6

Umma Imon, Mohammad Shah Alam

{"title":"Dust acoustic soliton and shock structures with consequence of head-on collision in multi-component unmagnetized plasmas","authors":"Umma Imon, Mohammad Shah Alam","doi":"10.1007/s10509-024-04392-6","DOIUrl":"10.1007/s10509-024-04392-6","url":null,"abstract":"<div><p>An unmagnetized plasma system comprising Maxwellian electrons, nonthermal ions, and variable negative charged dust grains is considered to investigate the consequence of head-on collision (such as interaction processes, and phase shifts) and the formation of dust acoustic soliton as well as shock structures in the Halley’s Comet (HC), Interstellar Clouds (IC), Noctilucent Clouds (NC), and Saturn’s Spokes (SS) environments. The two-sided Korteweg de Vries Burger (KdVB) and Korteweg de Vries (KdV) equations and corresponding phase shifts are derived employing the extended Poincaré-Lighthill-Kuo (ePLK) reductive perturbation technique (ePLKRPT). The coefficient of nonlinearities vanishes in each environment at the critical value of the plasma parameters. Consequently, the nonlinearity-coupled modified KdVB (mKdVB) and modified KdV (mKdV) equations, and the associated phase shifts have been derived. The concerned parameters play a crucial role in forming soliton and shock structures, phase shifts, and the interaction process of solitons and shocks in each environment. The compressive hump-shaped structures for mKdV solitons, as well as only positive phase shifts, are produced due to the influences of concerned parameters in each environment. In the collision processes, both the KdV and mKdV dust acoustic solitons follow the principle of superposition, but the shocks do not follow the principle of superposition.</p></div>","PeriodicalId":8644,"journal":{"name":"Astrophysics and Space Science","volume":"370 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142976555","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