IF 6.5 2区物理与天体物理

Astronomy & Astrophysics Pub Date : 2025-05-29 DOI: 10.1051/0004-6361/202554906

P. Dolgosheeva, D. Makarov, N. Libeskind

引用次数: 0

Extragalactic Archaeology: The Assembly History of Galaxies from Dynamical and Stellar Population Models 河外考古学：从动力学和恒星人口模型看星系的集合史

IF 33.3 1区物理与天体物理

Annual Review of Astronomy and Astrophysics Pub Date : 2025-05-29 DOI: 10.1146/annurev-astro-052622-025659

Glenn van de Ven, Jesús Falcón-Barroso, Mariya Lyubenova

{"title":"Extragalactic Archaeology: The Assembly History of Galaxies from Dynamical and Stellar Population Models","authors":"Glenn van de Ven, Jesús Falcón-Barroso, Mariya Lyubenova","doi":"10.1146/annurev-astro-052622-025659","DOIUrl":"https://doi.org/10.1146/annurev-astro-052622-025659","url":null,"abstract":"In this review, we show how combining dynamical and stellar population models with integral field spectroscopic data of nearby galaxies enable uncovering their assembly history. ▪ We discuss the advantages and limitations of various dynamical modelling approaches, focusing on measuring the mass distributions of nearby galaxies, including central black holes and dark matter halos. ▪ We highlight the use of Schwarzschild's orbit-superposition method to robustly decompose galaxies into dynamically distinct components and derive their intrinsic properties. ▪ We cover the application of single stellar population models to interpret observations of unresolved stars in nearby galaxies. ▪ We outline how combining dynamical and stellar population models can reveal the fossil records of galaxy assembly, from the origin of inner galaxy structures, to the buildup of disks, to the recovery of past galaxy mergers. We close by demonstrating how these models of nearby galaxies provide a bridge between studies of resolved stars in the local Universe and high-redshift galaxy observations. Together with direct coupling to state-of-the-art cosmological simulations, extragalactic archaeology promises key insights into galaxy formation and evolution.","PeriodicalId":8138,"journal":{"name":"Annual Review of Astronomy and Astrophysics","volume":"147 1","pages":""},"PeriodicalIF":33.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Detectability of Supernova remnants with the Southern Wide-field Gamma-ray Observatory 南方宽视场伽玛射线天文台对超新星遗迹的可探测性

IF 6.4 2区物理与天体物理

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-28 DOI: 10.1088/1475-7516/2025/05/096

N. Scharrer, S.T. Spencer, V. Joshi and A.M.W. Mitchell

引用次数: 0

Line-of-sight velocity projection impact on Local Group mass determinations 视距速度投影对局部群质量测定的影响

IF 6.5 2区物理与天体物理

Astronomy & Astrophysics Pub Date : 2025-05-28 DOI: 10.1051/0004-6361/202553846

David Benisty, David Mota

{"title":"Line-of-sight velocity projection impact on Local Group mass determinations","authors":"David Benisty, David Mota","doi":"10.1051/0004-6361/202553846","DOIUrl":"https://doi.org/10.1051/0004-6361/202553846","url":null,"abstract":"The mass of the Local Group (LG), which includes the Milky Way, Andromeda (M31), and their satellites, is crucial for validating galaxy formation and cosmological models. Traditional virial mass estimates, which rely on line-of-sight (LoS) velocities and simplified infall assumptions, are prone to systematic biases due to unobserved velocity components and anisotropic kinematics. Using the TNG cosmological simulation, we examined two limiting cases: the minor infall model – which ignores velocities perpendicular to LoS directions – and the major infall model – which assumes purely radial motion toward the center of mass (CoM). Our simulations demonstrate that geometric corrections are vital: the minor infall model underestimates the true mass, while the major infall model overestimates it. By applying these calibrated corrections to observed dwarf galaxy kinematics within 1 Mpc of the LG’s CoM, we derived a refined LG mass of MLG = (2.99 ± 0.60)×1012 M⊙. This finding resolves previous discrepancies as it aligns with predictions from the Λ cold dark matter model, timing arguments, and independent mass estimates. Our analysis highlights the importance of correcting for velocity anisotropy and offers a robust framework for dynamical mass estimations of galaxy groups.","PeriodicalId":8571,"journal":{"name":"Astronomy & Astrophysics","volume":"153 1","pages":""},"PeriodicalIF":6.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Elliptical stability of hopfions in bulk helimagnets 体helimages中hopons的椭圆稳定性

IF 3.7 2区物理与天体物理

Physical Review B Pub Date : 2025-05-28 DOI: 10.1103/physrevb.111.174450

Konstantin L. Metlov

{"title":"Elliptical stability of hopfions in bulk helimagnets","authors":"Konstantin L. Metlov","doi":"10.1103/physrevb.111.174450","DOIUrl":"https://doi.org/10.1103/physrevb.111.174450","url":null,"abstract":"Magnetic hopfions are three-dimensional topological solitons with nonzero Hopf index H</a:mi></a:math> in the vector field of material's local magnetization. Here elliptical stability of hopfions with <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\"><c:mrow><c:mi mathvariant=\"script\">H</c:mi><c:mo>=</c:mo><c:mn>1</c:mn></c:mrow></c:math> in a classical helimagnet is studied on the basis of a variational model. It is shown that, depending on their internal structure (vortex and antivortex tubes ordering), the hopfions can be either stable in a bulk magnet or unstable with respect to elongation along their central axis. It is found that the energy of stable hopfions is always below the energy of the <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\"><e:mrow><e:mn>2</e:mn><e:mi>π</e:mi></e:mrow></e:math>-skyrmion lattice in the same material, suggesting the possibility to use <f:math xmlns:f=\"http://www.w3.org/1998/Math/MathML\"><f:mrow><f:mn>2</f:mn><f:mi>π</f:mi></f:mrow></f:math>-skyrmions as a precursor for hopfion nucleation. Stability diagram for hopfions on the magnetic anisotropy-field phase diagram is computed numerically. Explicit analytical expressions for some of its critical lines are derived. Published by the American Physical Society 2025 ","PeriodicalId":20082,"journal":{"name":"Physical Review B","volume":"71 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Extended datasamples under the lens of Brane World Theory 膜世界理论下的扩展数据样本

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-28 DOI: 10.1088/1361-6382/adda89

Kyra Jacobo and Dorian Araya

{"title":"Extended datasamples under the lens of Brane World Theory","authors":"Kyra Jacobo and Dorian Araya","doi":"10.1088/1361-6382/adda89","DOIUrl":"https://doi.org/10.1088/1361-6382/adda89","url":null,"abstract":"This work revises the Brane World Theory known as Randall Sundrum with the modification of an exponential, redshift-dependent brane tension. This model is studied in a scenario assuming no dark energy, with the aim of determining whether it can reproduce the Universe’s acceleration on its own, without the addition of a dark energy fluid. Bayesian Statistical analysis is performed in order to constrain the free parameters of each scenario for which the datasamples of SLS, SNIa, OHD and BAO are used, the last two considering newly added elements on the data. Both Planck and Riess priors for h are used and compared. In both cases we are able to reproduce the late-time accelerated expansion in agreement with observational data. Interesting consistencies at transition redshift zt with ΛCDM are found suggesting that this might be a suitable model for studying the evolution of the Universe up to present date, however, some pathologies are detected in this model, namely a ‘Big Rip’ divergence of H(z) at z = 1, as well as a strong relationship between the form of the functional for the brane tension and the future evolution of the Universe in this model.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"1 1","pages":"115014"},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Magnetoelectric Decoupling in Bismuth Ferrite 铋铁氧体的磁电去耦

IF 8.6 1区物理与天体物理

Physical review letters Pub Date : 2025-05-28 DOI: 10.1103/physrevlett.134.216702

Thien Thanh Dang, Juliana Heiniger-Schell, Astita Dubey, João Nuno Gonçalves, Marianela Escobar Castillo, Daniil Lewin, Ian Chang Jie Yap, Adeleh Mokhles Gerami, Sobhan Mohammadi Fathabad, Dmitry Zyabkin, Doru Constantin Lupascu

{"title":"Magnetoelectric Decoupling in Bismuth Ferrite","authors":"Thien Thanh Dang, Juliana Heiniger-Schell, Astita Dubey, João Nuno Gonçalves, Marianela Escobar Castillo, Daniil Lewin, Ian Chang Jie Yap, Adeleh Mokhles Gerami, Sobhan Mohammadi Fathabad, Dmitry Zyabkin, Doru Constantin Lupascu","doi":"10.1103/physrevlett.134.216702","DOIUrl":"https://doi.org/10.1103/physrevlett.134.216702","url":null,"abstract":"It is still an open question if magnetoelectric coupling occurs at the atomic scale in multiferroic BiFeO</a:mi></a:mrow>3</a:mn></a:msub></a:mrow></a:math>. Nuclear solid-state techniques monitor local fields at the atomic scale. Using such an approach, we show that, contrary to our own expectation, ferroelectric and magnetic ordering in bismuth ferrite (<c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mrow><c:msub><c:mrow><c:mi>BiFeO</c:mi></c:mrow><c:mn>3</c:mn></c:msub></c:mrow></c:math> or BFO) decouple at the unit-cell level. Time differential perturbed angular correlation (TDPAC) data at temperatures below, close, and above the magnetic Néel temperature show that the coupling of the ferroelectric order to magnetization is completely absent at the bismuth site. It is common understanding that the antiferromagnetic order and the cycloidal ordering due to the Dzyaloshinskii-Moriya interaction generate a net zero magnetization of the sample canceling out any magnetoelectric effect at the macroscopic level. Our previous data show that a very large coupling of magnetic moment and electrical distortions arises on the magnetic sublattice (Fe site). The oxygen octahedra around the iron site experience a large tilt due to the onset of magnetic ordering. Nevertheless, the Bi-containing complementary sublattice carrying the largest part of ferroelectric order is practically unaffected by this large structural change in its direct vicinity. The magnetoelectric coupling thus vanishes already at the unit cell level. These experimental results agree well with an density functional theory (DFT) calculation. Published by the American Physical Society 2025 ","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"128 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

International Advisory Board 国际咨询委员会

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-05-28 DOI: 10.1016/S2211-3797(25)00202-5

引用次数: 0

An experimental investigation into the aerofoil trailing-edge broadband noise reduction using ogee serrations 尾翼尾缘宽带降噪的实验研究

IF 3.4 2区物理与天体物理

Applied Acoustics Pub Date : 2025-05-28 DOI: 10.1016/j.apacoust.2025.110851

Wenhao Zhou , Fusheng Qiu , Yulong Sun , Tongyang Shi , Qingqing Ye , Benshuai Lyu

{"title":"An experimental investigation into the aerofoil trailing-edge broadband noise reduction using ogee serrations","authors":"Wenhao Zhou , Fusheng Qiu , Yulong Sun , Tongyang Shi , Qingqing Ye , Benshuai Lyu","doi":"10.1016/j.apacoust.2025.110851","DOIUrl":"10.1016/j.apacoust.2025.110851","url":null,"abstract":"<div><div>Trailing edge (TE) serrations have been widely used as an effective technique to reduce the turbulent boundary-layer TE noise. In this paper, an experimental campaign is carried out to study the effects of ogee serrations on TE noise reduction. Serrations are installed on a NACA 0012 aerofoil and tested in an aeroacoustic wind tunnel. Ogee serrations of various geometries are retrofitted to the aerofoil and tested at various flow speeds and angles of attack (AoAs). The geometry of ogee serrations is parametrized by varying serration wavelength (λ), amplitude (2h), and sharpness factor (b). Traditional sawtooth serrations, considered a special case of ogee serration when its sharpness factor approaches zero, are also included. A sensitivity analysis of the TE noise reduction is conducted by varying each geometric parameter of the serrations. Results show that ogee serrations achieve effective noise reduction of 1-3 dB under various flow speeds. With the increase of AoA, the noise reduction gradually diminishes until noise increase occurs at AoA <math><mo>≥</mo><msup><mrow><mn>15</mn></mrow><mrow><mo>∘</mo></mrow></msup></math>. In particular, it is shown that ogee serrations outperform sawtooth serrations when the serration is sufficiently sharp (large 2h, small λ, and large b) at intermediate and high frequencies, in accordance with analytical predictions.</div></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":"239 ","pages":"Article 110851"},"PeriodicalIF":3.4,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Distinguishing Between Thermal Coupling and Spin Interaction for Cr3+ NIR Luminescence Through Temperature‐Dependent Lifetime Analysis 通过温度依赖寿命分析来区分Cr3+近红外发光的热耦合和自旋相互作用

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-05-28 DOI: 10.1002/lpor.202500568

Shengqiang Liu, Zhen Song, Feng Wang, Quanlin Liu

{"title":"Distinguishing Between Thermal Coupling and Spin Interaction for Cr3+ NIR Luminescence Through Temperature‐Dependent Lifetime Analysis","authors":"Shengqiang Liu, Zhen Song, Feng Wang, Quanlin Liu","doi":"10.1002/lpor.202500568","DOIUrl":"https://doi.org/10.1002/lpor.202500568","url":null,"abstract":"Octahedrally coordinated Cr3+ ions have been well‐documented for exceptional near‐infrared (NIR) luminescence properties, originating from intra‐configurational d‐d transition. While broadband emissions within intermediate crystal fields have been tentatively attributed to either thermally coupled excited states or Cr3+‐Cr3+ spin interaction. A definitive delineation of the underlying mechanism governing these two luminescence behaviors remains contentious. In this study, this controversy based on the thermal evolution of decay lifetime in gallate garnet and magnetoplumbite lattices is resolved. The temperature‐dependent time decay rate within intermediated crystal fields is evaluated, employing a numerical simulation within a two‐level model framework. The results reveal that the broadband luminescence in Y3Ga5O12:Cr3+ stems from the thermal coupling of 2E and 4T2 excited states, in which the thermal population of 4T2 state by the longer‐lived 2E level resulted in a pseudo‐exponential decrease in the lifetime as a function of temperature. In contrast, these lifetimes of SrGa12O19:Cr3+ and LaMgGa11O19:Cr3+ exhibit a significantly slower decay rate with temperature, indicating the emergence of spin interaction, which is verified by calculating the spin interaction energy. Therefore, the works provide an easy‐handle analytical framework to distinguish the physical mechanism of Cr3+ luminescence in intermediate crystal fields using temperature‐dependent lifetime analysis.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"7 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

物理与天体物理最新文献