363 papers
The paper outlines the scientific objectives of the upcoming XSMT-15m, a world-class 15-meter submillimeter telescope to be built in Qinghai, China, which aims to revolutionize understanding of galaxy evolution, interstellar medium processes, and transient phenomena through its high-altitude capabilities and advanced instrumentation.
This study combines theoretical modeling and observational analysis to demonstrate that anomalous microwave emission spectral features are dominantly controlled by grain size, shape, and environmental parameters, revealing that while molecular and dark clouds are consistent with spinning dust models, HII regions show significant discrepancies likely due to PAH depletion and biased detections.
By analyzing high-resolution spectra of quasar pairs at cosmic noon, this study reveals that C IV absorption systems exhibit multiple coherence scales, with a small-scale coherence of approximately 4.7 kpc corresponding to individual clouds and a large-scale coherence of roughly 654 kpc reflecting the extent of C IV-enriched regions and galaxy clustering.
This study presents the first spatially resolved NIRSpec/IFU analysis of the MACS0647-JD system, revealing a merger-driven starburst fueled by turbulent, metal-poor gas inflows that create distinct chemical and kinematic differences between the system's two stellar components.
This paper proposes a framework demonstrating that dark matter subhaloes can erase Galactic bar resonances by diffusing stars out of their resonant action space, thereby offering a method to constrain the subhalo mass function and dark matter properties based on the observed persistence of these resonant features.
This paper demonstrates that mass-dependent relaxation and velocity anisotropy render single-scale self-similar evolution structurally unstable in multi-mass star clusters, driving a transition to multi-scale, near-homologous evolution characterized by mass segregation and direction-dependent growth rates.
This study utilizes a cosmological galaxy evolution simulation with dust treatment to demonstrate that the observed increase in dust temperature with redshift is primarily driven by higher star formation rate surface densities and lower dust-to-gas ratios, rather than variations in grain properties.
This study presents low-resolution spectroscopic measurements of systemic velocities and metallicities for five poorly known Galactic clusters, revealing that Pfleiderer 2 is likely an in-situ Milky Way object, RLGC2 and Koposov 1 are associated with the Gaia-Sausage-Enceladus and Sagittarius dwarf spheroidal accretion events respectively, while Koposov 2 and Muñoz 1 show ambiguous or tentative origins.
This study demonstrates that self-interacting dark matter models, particularly those with large cross-sections, can explain the diverse dark matter density profiles of Milky Way ultra-faint dwarf galaxies by showing that most have undergone gravothermal collapse accelerated by tidal stripping.
This paper presents the Far-Ultraviolet Extragalactic Legacy (FUEL) Survey, which utilizes 365 Hubble Space Telescope orbits to produce high-resolution FUV images and catalogs of the GOODS-S, GOODS-N, and COSMOS fields, thereby filling a critical redshift gap for studying star formation and Lyman continuum emission in galaxies between z ≈ 0 and z > 1.2.
The paper reports the detection of MXDFz4.4, the highest-redshift Lyman continuum emitter found to date at z=4.442, which exhibits high ionizing photon escape fractions likely driven by a recent starburst and supports the use of Ly-alpha morphology as a tracer for LyC escape in the early Universe.
Using deep wide-band observations from the upgraded Giant Metrewave Radio Telescope (uGMRT), this study unambiguously detects non-thermal radio emission in the Extended Orion Nebula and identifies a strong association between this emission and outflows from young stellar objects.
By analyzing 17 years of Fermi-LAT data for the blazar PG 1553+113, this study reveals that while the source exhibits chromatic flares, its 2.2-year gamma-ray quasi-periodic oscillation is achromatic, thereby supporting a geometric origin like jet precession over intrinsic plasma-driven mechanisms.
By analyzing 18 years of Fermi-LAT data, this study links a 1.7-year gamma-ray quasi-periodic oscillation in PKS 2155-304 to a spectral hardening event occurring at flux minima, proposing a geometric masking scenario where jet structure regulates the visibility of acceleration processes otherwise obscured by relativistic boosting.
This paper proposes that geometric masking, where Doppler boosting preferentially amplifies a soft jet component in aligned AGN, explains extreme spectral hardening events and TeV detections in low-flux states, thereby refining the AGN unification scheme and suggesting that high-energy particle acceleration occurs more frequently than flux-selected observations imply.
This paper reviews the current understanding of interstellar polycyclic aromatic hydrocarbons (PAHs)—including their formation, chemical evolution, and critical roles in the interstellar medium—by synthesizing new insights from James Webb Space Telescope observations with supporting laboratory and quantum chemistry studies to chart the field's future progress.
The paper introduces Beyond21, a fast, open-source Python package that provides a unified framework for modeling the Cosmic Dawn and Epoch of Reionization to predict global 21-cm signals and other observables, while enabling flexible exploration of both standard astrophysics and beyond-Standard-Model scenarios like millicharged dark matter.
This study reports the first detection of double-peaked forbidden emission lines in the LINER galaxy IC 1459, successfully modeling them with a disk-like broad-line region to demonstrate that such lines originate in lower-density outskirts of the BLR.
This paper introduces NEXUS, a JWST Multi-Cycle Treasury survey around the North Ecliptic Pole comprising Wide and Deep tiers for multi-epoch imaging and spectroscopy, and details the status, targeting information, and initial data releases for its Deep tier's 18-epoch observing campaign.
By combining Gaia astrometry and Gaia-ESO Survey radial velocities for 430 members, this study determines the 3D rotation of the open cluster NGC 2516, revealing a median rotational velocity of 0.12 km/s at a 74-degree angle to the galactic plane that contradicts expected dependencies on cluster age and mass.