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astro-ph.EP2025★ 6 cited

A free-floating-planet microlensing event caused by a Saturn-mass object

Subo Dong, Zexuan Wu, Yoon-Hyun Ryu +39

A population of free-floating planets is known from gravitational microlensing surveys. None have a directly measured mass, owing to a degeneracy with the distance, but the populat…

astro-ph.HE2025★ 3 cited

Multiband optical variability on diverse timescales of the blazar Ton 599 from 2011 to 2023

O. Vince, C. M. Raiteri, M. Villata +72

(Shortened)Context: We analyze the optical variability of the FSRQ Ton 599 using BVRI photometry from the WEBT collaboration (2011-2023), complemented by photometric and spectrosco…

astro-ph.CO2025

Revealing the intricacies of radio galaxies and filaments in the merging galaxy cluster Abell 2255. II. Properties of filaments using multi-frequency radio data

E. De Rubeis, M. Bondi, A. Botteon +11

In this paper, we aim to further analyze the filaments in Abell 2255 combining LOFAR data with uGMRT (1260 MHz) and VLA (1520 MHz) data to constrain the spectral shape of the filam…

astro-ph.GA2025★ 1 cited

The Competing Influence of Ram Pressure and Tidal Interaction in NGC 2276

Luka Matijević, Neven Tomičić, Antonino Marasco +9

The evolution of galaxies in groups is profoundly influenced by a variety of physical processes, with ram pressure and tidal interactions playing pivotal roles in shaping their str…

astro-ph.HE2025★ 2 cited

XMM-Newton multi-year campaign on NGC 55 ULX-1: Resolving the wind and its variability with RGS

C. Pinto, S. Caserta, F. Barra +12

Winds are an important ingredient in the evolution of X-ray binary (XRB) systems, particularly those at high accretion rates such as ultra-luminous X-ray sources (ULXs), because th…

astro-ph.SR2025★ 3 cited

XRISM view of a stellar flare: High-resolution Fe K spectra of HR 1099, an RS CVn-type star

Miki Kurihara, Masahiro Tsujimoto, Michael Loewenstein +21

A high-resolution X-ray spectroscopic observation was made of the RS CVn-type binary star HR 1099 using the Resolve instrument onboard XRISM for its calibration purposes. During th…

astro-ph.GA2025

A global view on star formation: The GLOSTAR Galactic plane survey XII. Effelsberg's continuum view and data release

Y. Gong, W. Reich, M. R. Rugel +24

Extended radio continuum emission and its linear polarization play a key role in probing large-scale structures of synchrotron and free-free emission in the Milky Way. Despite the…

astro-ph.GA2025★ 1 cited

HELM's deep: Highly Extincted Low-Mass galaxies seen by JWST

L. Bisigello, G. Gandolfi, A. Grazian +25

The dust content of star-forming galaxies is generally positively correlated with their stellar mass. However, some recent JWST studies have shown the existence of a population of…

astro-ph.IM2025

Finding New Debris Discs at Sub-millimetre Wavelengths

Mark Booth, Patricia Luppe, Sebastian Marino +9

Debris discs reveal the architectures and dynamical histories of planetary systems. Sub-millimetre observations trace large dust grains within debris discs, revealing their bulk pr…

astro-ph.IM2025

The Future of Evolved Planetary Systems

Roberto Raddi, Anna F. Pala, Alberto Rebassa-Mansergas +19

Understanding the formation, evolution, and chemical diversity of exoplanets are now central areas of astrophysics research. White dwarfs provide a uniquely sensitive laboratory fo…

astro-ph.EP2025★ 2 cited

The Flying Saucer edge-on disc's Near Infrared silhouette revealed by the JWST JEDIce program

Emmanuel Dartois, Jennifer A. Noble, Jennifer B. Bergner +17

Edge-on discs offer a unique opportunity to probe radial and vertical dust and gas distributions in the protoplanetary phase. This study aims to investigate the distribution of mic…

astro-ph.IM2025★ 33 cited

The SPHEREx Satellite Mission

James J. Bock, Asad M. Aboobaker, Joseph Adamo +111

SPHEREx, a NASA explorer satellite launched on 11 March 2025, is carrying out the first all-sky near-infrared spectral survey. The satellite observes in 102 spectral bands from 0.7…

astro-ph.IM2025★ 3 cited

The automation of optical transient discovery and classification in Rubin-era time-domain astronomy

Nabeel Rehemtulla, Michael W. Coughlin, Adam A. Miller +1

Robotic wide-field time-domain surveys, such as the Zwicky Transient Facility and the Asteroid Terrestrial-impact Last Alert System, capture dozens of transients each night. The wo…

astro-ph.HE2025★ 10 cited

Delving into the depths of NGC 3783 with XRISM IV. Mapping of the accretion flow with Fe K emission lines

Chen Li, Jelle S. Kaastra, Liyi Gu +18

Using XRISM/Resolve time-averaged spectra of the well-known Seyfert-1.5 active galactic nucleus (AGN) in NGC 3783, we investigate the nature of the Fe K emission…

astro-ph.SR2025★ 3 cited

Precise determination of circumstellar disk lifetimes: Disk evolution in a single star-forming region

Fabian A. Polnitzky, Sebastian Ratzenböck, Josefa E. Großschedl +1

Determining how long circumstellar disks last is key to understanding the timescale of planet formation. Typically, this is done by measuring the fraction of young stars with infra…

astro-ph.EP2025★ 2 cited

TOI-7166 b: A Habitable Zone mini-Neptune planet around a nearby low-mass star

Khalid Barkaoui, Francisco J. Pozuelos, Benjamin V. Rackham +41

We present the discovery and validation of TOI-7166b, a 2.01+/-0.05R_Earth planet orbiting a nearby low-mass star. We validated the planet by combining TESS and multi-color high-pr…

astro-ph.GA2025

Experimental investigation of O2 diffusion and entrapment in interstellar amorphous solid water (ASW)

Lina Coulaud, Julia C. Santos, Ko-Ju Chuang

Interstellar ices are mainly composed of amorphous solid water (ASW) containing small amounts of hypervolatiles, such as O2, whose diffusion-limited reactions play a key role in sp…

astro-ph.HE2025★ 1 cited

Revealing the accelerating wind in the inner region of the colliding-wind binary WR 112

John D. Monnier, Yinuo Han, Michael F. Corcoran +17

Colliding winds in massive binaries generate X-ray-bright shocks, synchrotron radio emission, and sometimes even dusty "pinwheel" spirals. We report the first X-ray detections of t…

astro-ph.HE2025★ 5 cited

Chlorine and Potassium Enrichment in the Cassiopeia A Supernova Remnant

XRISM collaboration

The elements in the universe are synthesized primarily in stars and supernovae, where nuclear fusion favors the production of even-Z elements. In contrast, odd-Z elements are less…

astro-ph.GA2025★ 2 cited

VENUS: When Red meets Blue -- A multiply imaged Little Red Dot with an apparent blue companion behind the galaxy cluster Abell 383

Miriam Golubchik, Lukas J. Furtak, Joseph F. V. Allingham +50

We report the discovery of a doubly-imaged Little Red Dot (LRD) candidate behind the galaxy cluster Abell 383, which we dub A383-LRD1. Initially classified as a dropout galaxy in H…

astro-ph.CO2025★ 2 cited

The effect of baryons on the positions and velocities of satellite galaxies in the MTNG simulation

Sergio Contreras, Raul E. Angulo, Sownak Bose +5

Mock galaxy catalogues are often constructed from dark-matter-only simulations based on the galaxy-halo connection. Although modern mocks can reproduce galaxy clustering to some ex…

astro-ph.HE2025★ 4 cited

Probing jet base emission of M87* with the 2021 Event Horizon Telescope observations

Saurabh, Hendrik Müller, Sebastiano D. von Fellenberg +282

We investigate the presence and spatial characteristics of the jet base emission in M87* at 230 GHz, enabled by the enhanced uv coverage in the 2021 Event Horizon Telescope (EHT) o…

astro-ph.IM2025

AMKID -- a large KID-based camera at the APEX telescope

N. Reyes, A. Weiss, S. J. C. Yates +26

The thermal emission at sub-millimeter wavelengths carries unique information in many astronomical applications ranging from disks and planet formation around young stars, to galax…

astro-ph.SR2025★ 1 cited

VLBI astrometry of radio stars to link radio and optical celestial reference frames - II. 11 radio stars

Jingdong Zhang, Bo Zhang, Shuangjing Xu +10

The alignment between the radio-based International Celestial Reference Frame (ICRF) and the optical Gaia Celestial Reference Frame (Gaia-CRF) is critical for multi-waveband astron…