Institute of Astronomy and Astrophysics, Academia Sinica

Bowshocks driven by the pole-on molecular jet of outbursting protostar SVS 13

G. Blázquez-Calero, G. Anglada, S. Cabrit +13

Outflows play a key role in the star and planet formation processes. Some outflows show discrete clumps of cold molecular gas moving at extremely high velocities (EHVs) of $\sim$ 10…

The LEGA-C galaxy survey: multiple quenching channels for quiescent galaxies at $z \sim 1$

Angelos Nersesian, Yasha Kaushal, Marco Martorano +9

We analyzed the sizes and star-formation histories (SFHs) of 2908 galaxies with $M_{⋆} \geq 1 0^{9}$ M $_{⊙}$ at $0.6 < z < 1.0$ , drawn from the LEGA-C survey. The goal is to inves…

LEGA-C stellar populations scaling relations. I: Chemo-archaeological downsizing trends at z~0.7

Anna R. Gallazzi, Stefano Zibetti, Arjen van der Wel +11

We analyze stellar population properties of 552 galaxies at redshift 0.6<z<0.77 from the LEGA-C spectroscopic survey. This first paper in a series presents the catalog of revised a…

Statistics of the projected angles between the black-hole spin and the host-galaxy rotation axes from NewHorizon

Sebastien Peirani, Yasushi Suto, Clotilde Laigle +3

Understanding the alignment between AGN jets and their host galaxies is crucial for interpreting AGN unification models, jet feedback processes, and the co-evolution of galaxies an…

The MALATANG survey: star formation, dense gas, and AGN feedback in NGC 1068

Shuting Lin, Siyi Feng, Zhi-Yu Zhang +14

We aim to investigate the interplay between dense molecular gas, star formation, and active galactic nucleus (AGN) feedback in the luminous infrared galaxy (LIRG) NGC 1068 at sub-k…

Measurements of quasar proximity zones with the Ly $α$ forest of DESI Y1 quasars

Ryuichiro Hada, Paul Martini, David H. Weinberg +41

The intergalactic medium (IGM) around quasars is shaped by their dense environments and by their excess ionizing radiation, forming a "quasar proximity zone" whose size and anisotr…

Tracking Protostellar Variability in Massive Protoclusters with ALMA: I. Insights from QUARKS and MaMMOtH

Yuhan Yang, Tie Liu, Sheng-Yuan Liu +22

Millimeter/submillimeter variability is often attributed to dynamical disk-mediated accretion, yet detection is limited to low-mass protostars in nearby clouds. Recent observations…

Euclid Quick Data Release (Q1): Euclid spectroscopy of quasars. 1. Identification and redshift determination of 3500 bright quasars

Euclid Collaboration, Y. Fu, R. Bouwens +354

The slitless spectroscopy mode of the NISP onboard Euclid has enabled efficient spectroscopy of objects within a large FoV. We present a large and homogeneous sample of bright quas…

astro-ph.GA2025★ 6 cited

ALMAGAL VI. The spatial distribution of dense cores during the evolution of cluster-forming massive clump

E. Schisano, S. Molinari, A. Coletta +51

High-mass stars and star clusters form from the fragmentation of massive dense clumps driven by gravity, turbulence, and magnetic fields. The ALMAGAL project observed $\sim 1000$ cl…

The Rotation Dip in the Envelope-Disk Transition of HH 111: Evidence for Magnetic Braking

Jyun-Heng Lin, Chin-Fei Lee, Zhi-Yun Li +3

Magnetic braking can drive angular momentum loss in star formation and influence disk evolution. A previous study of HH 111 VLA1 suggested a decrease in rotation velocity in a regi…

LEGA-C stellar populations scaling relations. II: Dissecting mass-complete archaeological trends and their evolution since z~0.7 with LEGA-C and SDSS

Anna R. Gallazzi, Stefano Zibetti, Arjen van der Wel +11

With a sample of 552 galaxies at z~0.7 from the LEGA-C survey, we investigate how current star formation influences light-weighted mean stellar ages and metallicities, and their me…

astro-ph.GA2025★ 5 cited

ALMAGAL V. Relations between the core populations and the parent clump physical properties

D. Elia, A. Coletta, S. Molinari +54

Context. The fragmentation of massive molecular clumps into smaller, potentially star-forming cores plays a key role in the processes of high-mass star formation. The ALMAGAL proje…

REBELS-IFU: Spatially Resolved Ionizing Photon Production Efficiencies of 12 Bright Galaxies in the Epoch of Reionization

Lena Komarova, Mauro Stefanon, Andres Laza-Ramos +15

Measuring the ionizing photon production efficiency $ξ_{ion, 0}$ -- the ratio of ionizing photon output rate $Q_{H^{0}}$ to UV continuum luminosity $L_{UV}$ -- in gal…

High resolution mapping of molecular tori with ALMA

F. Combes, A. Audibert, S. Garcia-Burillo +11

Recent high resolution mapping of the circum-nuclear regions of Active Galactic Nuclei (AGN) has revealed the existence of geometrically thin nuclear disks, in general randomly ori…

The factors that influence protostellar multiplicity II. Gas temperature and mass in Perseus with APEX

N. M. Murillo, C. M. Fuchs, D. Harsono +5

Protostellar multiplicity is a common outcome of the star formation process. To fully understand the formation and evolution of these systems, the physical parameters of the molecu…

The Nearby Evolved Stars Survey III: First data release of JCMT CO-line observations

S. H. J. Wallström, P. Scicluna, S. Srinivasan +37

Low- to intermediate-mass ( $\sim$ 0.8 $-$ 8 M $_{⊙}$ ) evolved stars contribute significantly to the chemical enrichment of the interstellar medium in the local Universe, making accur…

Jets in Low-Mass Protostars

Somnath Dutta

Jets and outflows are key components of low-mass star formation, regulating accretion and shaping the surrounding molecular clouds. These flows, traced by molecular species at (sub…

The Prevalence of Bursty Star Formation in Low-Mass Galaxies at z=1-7 from Hα-to-UV Diagnostics

Marissa N. Perry, Anthony J. Taylor, Oscar A. Chavez Ortiz +15

We present an analysis of bursty star-formation histories (SFHs) of 346 star-forming galaxies at $1 ≲ z < 7$ , selected from JWST/NIRSpec G395M and PRISM spectroscopy provided b…

Detection of CH3+ in the O-rich planetary nebula NGC 6302

Charmi Bhatt, Jan Cami, Els Peeters +33

Planetary nebulae are sites where ejected stellar material evolves into complex molecules, but the precise physical conditions and chemical routes that govern these processes are u…

astro-ph.GA2025★ 8 cited

Polycyclic aromatic hydrocarbons destruction in star-forming regions across 42 nearby galaxies

Oleg V. Egorov, Adam K. Leroy, Karin Sandstrom +30

Polycyclic aromatic hydrocarbons (PAHs) are widespread in the interstellar medium (ISM) of Solar metallicity galaxies, where they play a critical role in ISM heating, cooling, and…

Understanding the Evolution of Black Hole Accretion and Dust out to z=4 with a Deep Imaging Extragalactic Survey with PRIMA

Andreas L. Faisst, Chian-Chou Chen, Laure Ciesla +1

The cosmic evolution of obscured star formation, dust properties and production mechanisms, and the prevalence of dust-obscured AGN out to high redshifts are currently some of the…

Probing the resolved K-S relation in nearby galaxies: Insights from UVIT and ALMA observations

K Sruthi, Sreeja S Kartha, Blesson Mathew +3

This study examines the resolved Kennicutt Schmidt (rKS) relation, defined as the connection between the star formation rate surface density (Sigma SFR) and the molecular gas mass…

Unveiling Stellar Feedback and Cloud Structure in the $ρ$ Ophiuchi A Region with ALMA and JWST: Discovery of Substellar Cores, C $^{18}$ O Striations, and Protostellar Outflows

Fumitaka Nakamura, Ryohei Kawabe, Shuo Huang +9

In clustered star-forming regions, stellar feedback-such as HII regions/photon-dominated regions (PDRs), and protostellar jets/outflows-shapes cloud structures and influences star…