SN 2023fyq is the first Type Ibn supernova with a directly detected hot luminous progenitor consistent with a low-mass helium star in a binary system, based on pre-explosion imaging, disappearance confirmation, and multi-wavelength environmental analysis.
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Dust grain size distributions evolve from large-grain dominated at high redshift to MRN-like at low redshift, driven primarily by shattering and ISM accretion after stars supply initial large grains, reproducing z=0 dust masses and Milky Way extinction properties.
Red quasars are intrinsically X-ray weak with low alpha_OX values, tracing a distinct evolutionary stage of suppressed black hole accretion relative to stellar mass growth.
The satellite metallicity enhancement profile around clusters declines steeply in the core, plateaus near the virial radius due to enriched inflow, and declines further out, with mass loss and quenching dominating the core.
Kriging and Gaussian mixture modeling applied to HST data yield 1-pc resolution dust extinction maps in the SMC and LMC, showing log-normal column density distributions and systematic differences from FIR-derived dust masses.
Detection of helium lines in Balmer-dominated shocks of Type Ia SNRs reveals enhanced helium in some remnants and challenges shock models, enabling new constraints on progenitor environments.
A new fitting methodology applied to UV absorption data recovers radial trends in galactic wind velocities and mass-loading factors by constraining initial hot and cool phase parameters in a multiphase model.
SDSSJ110546.07+145202.4 is the first known long-duration radio changing-look NLS1 galaxy whose outburst is explained by an accretion-rate change that triggered a powerful radio jet.
Two long period radio transients are detached white dwarf-M dwarf binaries with matching periods, massive cool crystallized white dwarfs, low inclinations, and an estimated population of 100-2000 such systems within 2 kpc.
New JWST and Keck data on off-nuclear TDE 2025abcr show shifting emission-line velocities from a changing reprocessing layer and an IR power-law slope of -2.13 that is consistent with either reprocessing gas or a young stellar cluster of mass ~10^7.6 solar masses.
Spectroscopic data indicate that the ionized gas in ORC4's central galaxy is shock-ionized by a wind associated with the radio ring's formation.
High-resolution mapping reveals nitrogen enrichment around super star clusters in NGC 5253, attributed to Wolf-Rayet stars with material expelled to surrounding gas.
Measures a new nebular attenuation curve from 1400-9550 Å for galaxy GOODSN-17940 at z=4.41 that is steeper than Milky Way/SMC/Calzetti at long wavelengths, similar in blue-optical, and shallower in UV with no 2175 Å bump.
New high-redshift empirical T_e-based metallicity calibrations for strong-line ratios derived from direct oxygen abundances in 46 galaxies spanning z=1.4-8.7.
Decomposition of CALIFA early-type galaxies shows star formation confined to discs compatible with the SFMS, with no molecular gas deficit in bulges relative to discs at fixed mass.
VarWISE catalog identifies 457,080 high-confidence infrared variables (49.81% new) and an extended set of 1.9 million from NEOWISE photometry via spatial clustering, VARnet detection, and XGBoost classification.
Resolved HI observations of six baryon-dominated dwarf galaxy candidates show four are dark-matter deficient with high baryon efficiency, two in isolated environments without tidal signs.
V486 Car is a near-contact binary with component masses 2.1 and 0.4 solar masses, radii 3.2 and 1.48 solar radii, temperatures 10000 K and 6200 K, plus evidence for a ~0.3 solar mass companion at a few AU.
New G-band relation [Fe/H] = -6.93 - 6.04P + 1.65 φ31 calibrated on 72 RR Lyrae stars with spectroscopic anchors, yielding 0.00 dex bias and 0.26 dex RMS scatter.
Post-perihelion UVES spectra of interstellar comet 3I/ATLAS reveal elevated NiI and FeI production explained by direct sublimation of Ni(CO)4 and Fe(CO)5 from subsurface layers, with a transient heat source accounting for the pre-perihelion Ni excess.
Spatially resolved observations of z~0.1 galaxies show Mg II absorption outflow velocities are systematically higher than Hα emission velocities by ~0.4 dex while maintaining similar correlations with star formation rate and surface density.
JWST observations of ERQs show stratified gas kinematics via deblended optical emission lines, with UV lines dominated by scattered light and optical lines mixing scattered and obscured emission.
High-contrast imaging with PACO and REXPACO reveals a new candidate companion at ~14 au and a tightly wound H-alpha spiral in the inner disk of HD 142527, suggesting ongoing companion-disk interactions.
Multi-phase observations of NGC 1427A indicate tidal torquing from a dwarf fly-by has pre-conditioned its gas for ram-pressure stripping by the Fornax intracluster medium, placing the galaxy at the onset of environmental quenching with a declining star formation rate.
citing papers explorer
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SDSSJ110546.07+145202.4: The first long-duration radio changing-look NLS1 galaxy
SDSSJ110546.07+145202.4 is the first known long-duration radio changing-look NLS1 galaxy whose outburst is explained by an accretion-rate change that triggered a powerful radio jet.
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JWST and Keck observations of the off-nuclear tidal disruption event TDE 2025abcr: An evolving reprocessing layer
New JWST and Keck data on off-nuclear TDE 2025abcr show shifting emission-line velocities from a changing reprocessing layer and an IR power-law slope of -2.13 that is consistent with either reprocessing gas or a young stellar cluster of mass ~10^7.6 solar masses.
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Magnetar Engines in Broad-lined Type Ic Supernovae and a Unified Picture for Magnetar-powered Stripped-envelope Supernovae
Broad-lined Type Ic supernovae are powered by magnetar engines, showing a universal ejecta-mass versus initial-spin correlation across stripped-envelope supernova types that supports a common progenitor framework.
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Early interaction signatures and an extended plateau phase in Type II SN 2020aze
SN 2020aze displays early He II emission from ejecta-CSM interaction, a steep V-band decline, and semi-analytical modeling yields a ~14 solar-mass red supergiant progenitor with ~12 solar-mass ejecta and 1.5e51 erg explosion energy.
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An X-ray and optical spectral study of the changing-look narrow-line Seyfert 1 2MASX J0413-0050
2MASX J0413-0050 transitioned from a narrow-line Seyfert 1 to a Seyfert 1.9 and back while remaining in a high accretion state, supporting classification as a changing-state AGN.
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The GMRT High-Resolution Southern Sky Survey for pulsars and transients -- VIII: Orbital Variability and the Evolution of a 1-Day He-WD Millisecond Pulsar J2101-4208
PSR J2101-4802 is a transitional millisecond pulsar with a ~1-day orbit, 0.15 solar mass He-WD companion, and large orbital period derivative that links redback-like systems to detached binaries.
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The Double-Peaked Calcium-Strong SN 2025coe: Progenitor Constraints from Early Interaction and Ejecta Asymmetries
SN 2025coe's double-peaked light curve and nebular spectra are consistent with either an asymmetric core-collapse explosion of a low-mass He-core progenitor or a thermonuclear hybrid white dwarf merger.
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A search for successful and choked jets in nearby broad-lined Type Ic supernovae
Multi-wavelength monitoring of nearby SNe Ic-BL adds new constraints on the fraction with relativistic jets comparable to SN 1998bw and flags candidates for choked jets and CSM-driven radio emission.
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Characterizing the host galaxies and delay times of Ca-rich gap transients vs 91bg-like SNe and normal Type Ia SNe
Ca-rich gap transients and 91bg-like SNe occupy similar massive quiescent host parameter space with peak delay times around 10^4 Myr, unlike normal Type Ia (~10^3 Myr) and Type II (~10 Myr) SNe.
- Discovery of a Featureless Tidal Disruption Event at z~1 with the Wide Field Survey Telescope
- EP250827b/SN 2025wkm: An X-ray Flash-Supernova Powered by a Central Engine and Circumstellar Interaction