Institute of Astronomy and Astrophysics, Academia Sinica

Probing Exoplanetary Chemistry with Ariel: Scientific Priorities and Observational Strategies

Olivia Venot, Yamila Miguel, Robin Baeyens +30

Over the past two decades, increasingly precise observations have revealed that exoplanet atmospheres are chemically diverse and often far from equilibrium, with processes such as…

astro-ph.IM2026

First Very Long Baseline Interferometry Fringe Detection at 690GHz

Ming-Tang Chen, Geoffrey B. Crew, Dan Bintley +42

We report the first very long baseline interferometry (VLBI) experiment conducted in the 690 GHz atmospheric window. On 2024 November 21, observations with the Atacama Large Millim…

Why Azimuthal Averaging Works in Halo Lensing: Symmetry and Power Counting for Nonlinear Shear and Magnification

Keiichi Umetsu

Cluster weak-lensing analyses often compress two-dimensional lensing fields into azimuthally averaged radial profiles and evaluate nonlinear observables from the averaged convergen…

Magnetic Fields in Massive Star-forming Regions (MagMaR). IX. Radiative Torque Alignment and Disruption in NGC6334I

Vineet Rawat, Thiem Hoang, Patricio Sanhueza +18

Intense radiation from high-mass stars is expected to significantly affect dust grain alignment and evolution through RAdiative Torques (RATs). We investigate this effect in a mass…

A Universal Relation Between Primordial Density-Potential Cross-correlation Coefficient and Spin Factor Distribution

Jun-Sung Moon, Jounghun Lee, Juhan Kim

Recent studies have revealed that the key properties of visible galaxies like their optical sizes, stellar ages, star formation rates and morphologies are closely linked with the a…

Size-Mass Relation Shows Its Colours: Contrasting Physical Imprints of Galaxy Evolution in Rest-Frame UV and Optical

Angelo George, Marcin Sawicki, Ivana Damjanov

The galaxy size-mass relation (SMR) is a key scaling relation used to constrain the physical processes that build galaxy structure, yet it is almost always measured in a single res…

Merging Galaxy Clusters and the Search for New Physics of Dark Matter: A Review

Rogério Monteiro-Oliveira

Merging galaxy clusters represent one of the most powerful macroscopic laboratories in the Universe for searching for new physics within the dark sector. High-velocity cosmic colli…

astro-ph.HE2026

Radio Constraints on the Circumstellar Environment of the Type IIb Supernova SN 2024iss

Yuhei Iwata, Tomoki Matsuoka, Masanori Akimoto +6

Type~IIb supernovae exhibit diverse progenitor properties, and radio observations offer a unique probe of their mass-loss histories shortly before the explosion. We present Japanes…

Effects of temperature-dependent optical properties on the determination of interstellar dust masses

Lapo Fanciullo, Jonathan P. Marshall, Francisca Kemper +2

Accurate measurements of interstellar dust mass are key to answering several astrophysical questions. A common method of obtaining the mass is to fit the far-infrared thermal emiss…

astro-ph.IM2026

GREX-PLUS Science Book v2

PLUS Science Team, Shunsuke Baba, Sirio Belli +52

GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is a mission candidate for a JAXA strategic L-class mission to be launched in the 2030s. Its primary sc…

astro-ph.SR2026

Magnetic fields in Massive Star-Forming Regions (MagMaR). VIII. Magnetic field overrun by gravity in GGD 27's accretion streamers

M. Fernández-López, J. A. López-Vázquez, J. M. Girart +20

Context. Accretion streamers connected to protostellar disks and/or envelopes are thought to transport material across several thousand of au. Whether the motions of the gas compri…

A parameterised approach to disequilibrium retrievals in the JWST era: Application to NIRCam observations of HD 189733b

Jake Taylor, Shang-Min Tsai, Vivien Parmentier +2

Atmospheric retrievals are a widely used technique for inferring the physical and chemical properties of exoplanetary atmospheres from observed spectra. A common simplifying assump…

astro-ph.GA2026★ 1 cited

Euclid: Discovery of 31 new quasars at $6.6 < z < 7.8$

D. Yang, J. F. Hennawi, F. Guarneri +211

We report the discovery of 31 new high- $z$ quasars in the redshift range $6.6 < z < 7.8$ . These quasars were selected from approximately 3000 deg $^{2}$ of sky covered during the firs…

The Longest-period Young Transiting Exoplanets. A Duo of Puffy Giants inside a Debris Disk

Carlos del Burgo, Alejandro Suárez Mascareño, Ana Heras Pastor +35

We identify two large-radius planets around the F-type star HD 114082 as the longest-period young transiting exoplanets known. From the first transit, detected by NASA's Transiting…

astro-ph.SR2026

Pre-nova Observations of T CrB: A view from the CHARA Array

Ryan Norris, Narsireddy Anugu, Thomas Gaudin +38

T CrB is a symbiotic recurrent nova consisting of a red giant and white dwarf with recent eruptions in 1866 and 1946 and an anticipated eruption in the mid 2020s. We report CHARA A…

astro-ph.GA2026★ 1 cited

Direct detection of cool molecular gas in a star-forming galaxy at $z = 7.31$

Karin Cescon, Jacqueline A. Hodge, Leindert A. Boogaard +21

We investigate the molecular gas content and interstellar medium (ISM) conditions of REBELS-25, a massive, star-forming galaxy at $z = 7.31$ . Deep VLA Q-band and ALMA Band 3 observat…

astro-ph.GA2026★ 1 cited

Investigating the role of turbulence in the interstellar medium in $z \sim 3$ dusty star-forming galaxies using kpc-resolution ALMA dust and gas maps

B. A. Westoby, J. A. Hodge, P. Sharda +28

We present ALMA high-resolution ( $\sim$ 0.25 $^{''}$ /2 kpc) CO(5-4) and CO(4-3) observations of three $z \sim 3$ submillimetre-selected dusty galaxies from the ALESS survey.…

Euclid Quick Data Release (Q1): The impact of AGN emission on SED-derived physical properties

Euclid Collaboration, B. Laloux, A. Bongiorno +309

The Euclid Quick Data Release (Q1) is a powerful dataset to study active galactic nuclei (AGN) and their host galaxies. Deriving their physical properties through multi-component s…

Investigating the young stellar populations and hierarchies in nearby galaxies with the UVIT. II. Presenting the properties of ~25,000 UV-detected star-forming clumps

Gairola Shashank, Smitha Subramanian, Chayan Mondal +2

Studying young stellar populations within galaxies can help refine our understanding of recent star formation in galaxies and their evolution. With this motivation, we present a ca…

Magneto-Gravitational Regulated Streamer Accretion onto a Class 0 Protostellar System

Bo Huang, Josep M. Girart, Ian W. Stephens +17

How do magnetic fields shape the way young stars gather gas from their birth clouds? Using high-resolution Atacama Large Millimeter/submillimeter Array observations of a young trip…

astro-ph.IM2026

Hubble Science in the 2030s White Paper: High-Contrast Optical and UV Spectroscopy with HST/STIS

K. Ward-Duong, J. Debes, J. Aguilar +11

The Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope currently stands as the sole space-based astronomical facility providing visible-light coronagraphic i…

Destructuring the disk of AB Aurigae: Dynamics and accretion

Anthony Boccaletti, Emmanuel Di Folco, Anne Dutrey +23

In this paper, we present near-IR polarized images of the AB Aur disk at three epochs spanning 3.85 years with SPHERE/IRDIS, as well as Halpha images obtained with SPHERE/ZIMPOL at…

The PARADIGM Project II: Characterising Nuclear and Diffuse Radio Components in Local U/LIRGs

Geferson Lucatelli, Rob Beswick, Javier Moldón +14

Disentangling SF and AGN emission is essential for understanding galaxy evolution, yet remains challenging in merging systems where both processes are enhanced and spatially intert…