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A pulsar-like polarization angle swing from a nearby fast radio burst
Kilpatrick, Charles D.; Prochaska, J. Xavier; Kaspi, Victoria M. +41 more
Fast radio bursts (FRBs) last for milliseconds and arrive at Earth from cosmological distances. Although their origins and emission mechanisms are unknown, their signals bear similarities with the much less luminous radio emission generated by pulsars within our Miky Way Galaxy1, with properties suggesting neutron star origins2,3
A high-velocity star recently ejected by an intermediate-mass black hole in M15
Huang, Yang; Liu, Jifeng; Lu, Youjun +4 more
The existence of intermediate-mass black holes (IMBHs) is crucial for understanding various astrophysical phenomena, yet their existence remains elusive, except for the LIGO-Virgo detection. We report the discovery of a high-velocity star J0731+3717, whose backward trajectory about 21 Myr ago intersects that of globular cluster M15 within the clus…
The Size of Accretion Disks from Self-consistent X-Ray Spectra and UV/Optical/NIR Photometry Fitting: Applications to ASASSN–14li and HLX–1
Mummery, Andrew; Guolo, Muryel
We implement a standard thin disk model with the outer disk radius (Rout) as a free parameter, integrating it into a standard X-ray fitting package to enable self-consistent and simultaneous fitting of X-ray spectra and Ultraviolet (UV), Optical, and Near-infrared (NIR) photometry. We apply the model to the late-time data (Δt ≈ 350–1300…
Einstein Probe Discovery of EP J005245.1‑722843: A Rare Be–White Dwarf Binary in the Small Magellanic Cloud?
Liu, Y.; Haberl, F.; Ness, J. -U. +32 more
On 2024 May 27, the Wide-field X-ray Telescope on board the Space Sciences, University of Chinese Academy of Einstein Probe (EP) mission detected enhanced X-ray emission from a new transient source in the Small Magellanic Cloud during its commissioning phase. Prompt follow-up with the EP Follow-up X-ray Telescope, the Swift X-ray Telescope. and NI…
Weak-lensing Characterization of the Dark Matter in 29 Merging Clusters that Exhibit Radio Relics
Jee, M. James; Finner, Kyle; van Weeren, Reinout J. +5 more
We present a multiwavelength analysis of 29 merging galaxy clusters that exhibit radio relics. For each merging system, we perform a weak-lensing analysis on Subaru optical imaging. We generate high-resolution mass maps of the dark matter distributions, which are critical for discerning the merging constituents. Combining the weak-lensing detectio…
RIOJA. Complex Dusty Starbursts in a Major Merger B14-65666 at z = 7.15
Costantin, Luca; Arribas, Santiago; Inoue, Akio K. +20 more
We present JWST NIRCam imaging of B14-65666 ("Big Three Dragons"), a bright Lyman-break galaxy system (MUV = ‑22.5 mag) at z = 7.15. The high angular resolution of NIRCam reveals the complex morphology of two galaxy components: galaxy E has a compact core (E-core), surrounded by diffuse, extended, rest-frame optical emission, which is l…
Constraints on the Variation of the Fine-structure Constant at 3 < z < 10 with JWST Emission-line Galaxies
Jiang, Linhua; Cai, Zheng; Bosman, Sarah E. I. +7 more
We present constraints on the spacetime variation of the fine-structure constant α at redshifts 2.5 ≤ z < 9.5 using JWST emission-line galaxies (ELGs). The galaxy sample consists of 621 high-quality spectra with strong and narrow [O III] λλ4959,5007 doublet emission lines from 578 galaxies, including 232 spectra at z > 5. The [O III] doublet…
EMPDF: inferring the Milky Way mass with data-driven distribution function in phase space
Li, Ting S.; Wang, Wenting; Han, Jiaxin +4 more
We introduce the EMPDF (empirical distribution function), a novel dynamical modelling method that infers the gravitational potential from kinematic tracers with optimal statistical efficiency under the minimal assumption of steady state. EMPDF determines the best-fitting potential by maximizing the similarity between instantaneous kinematics and t…
The kinematics of 30 Milky Way globular clusters and the multiple stellar populations within
Cabrera-Ziri, I.; Hilker, M.; Carbajo-Hijarrubia, J. +5 more
Aims. The spectroscopic and photometric classification of multiple stellar populations (MPs) in Galactic globular clusters (GCs) has enabled comparisons between contemporary observations and formation theories regarding the initial spatial configurations of the MPs. However, the kinematics of these MPs is an aspect that requires more attention. We…
MINDS: The influence of outer dust disc structure on the volatile delivery to the inner disc
Henning, Thomas; Güdel, Manuel; Tabone, Benoît +18 more
Context. The Atacama Large Millimeter/submillimeter Array (ALMA) has revealed that the millimetre dust structures of protoplanetary discs are extremely diverse, ranging from small and compact dust discs to large discs with multiple rings and gaps. It has been proposed that the strength of H2O emission in the inner disc particularly depe…