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19932026
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1,706 papers · 1 filter

astro-ph.GA2026

A -like metallicity profile in the disk of the Sagittarius dwarf galaxy

Zixi Guo, Xiang-Xiang Xue, Jiang Chang +12

Unveiling the properties of the progenitors that formed the tidal structures of the Milky Way (MW) is essential for exploring the MW's assembly history. Such studies further afford…

astro-ph.GA2026

Identifying the principal mechanism of star formation feedback

Chong Li, Rouyu Li, Keping Qiu +27

Feedback from massive stars regulates the formation of next-generation stars and planets and thus shapes the evolution of galaxies, yet observational evidence capable of determinin…

astro-ph.GA2026

High-Priority Compact-Object Candidates in Young Clusters from the \textit{Gaia} DR3 Non-Single-Star Catalog

Dejian Liu, Kangteng Chang, Yao Huang +7

The search for massive compact objects such as black holes (BHs) or neutron stars (NSs) in star clusters is longstanding challenge in astrophysics, yet no definitive identification…

astro-ph.GA2026

First Trigonometric Parallax Measurements with the KVN and VERA Array (KaVA)

Nobuyuki Sakai, Daisuke Sakai, Noriyuki Kawaguchi +26

To demonstrate the astrometric capability of the combined Korean VLBI (Very Long Baseline Interferometry) Network (KVN) and VLBI Exploration of Radio Astrometry (VERA) Array (KaVA)…

astro-ph.GA2026

Supernova origin of galactic turbulence revealed by superbubbles

Fanyi Meng, Chao-Wei Tsai, Jingwen Wu +13

Supernovae (SNe) are among the leading candidates for powering galactic-scale turbulence. SNe drive expanding shells of neutral atomic hydrogen (HI) known as superbubbles. Due to t…

astro-ph.GA2026★ 1 cited

LenNet: Direct Detection and Localization of Strong Gravitational Lenses in Wide-Field Sky Survey Images

Pufan Liu, Hui Li, Ziqi Li +9

Strong gravitational lenses are invaluable tools for addressing fundamental questions in astrophysics, from the nature of dark matter to the expansion of the universe. While curren…

astro-ph.GA2026

Local constraints on alcohol--thioalcohol analogs in G35.2N

Xuefang Xu, Shanghuo Li, Qian Gou +6

The chemistry of sulfur-bearing complex organic molecules in dense star-forming environments remains uncertain, partly because the dominant sulfur reservoirs in dense gas and ices…

astro-ph.GA2026

Testing Chemical Tagging with LAMOST: Intrinsic Abundance Dispersion of Subgiant Stars in the Galactic Disk

Wu Yaqian, Xiang Maosheng, Zhao Gang +4

The scatter in elemental abundances among stars of similar age and metallicity reflects chemical inhomogeneity in their birth environments, making abundance scatter a key observabl…

astro-ph.GA2026

ALMA Reveals an Explosive Outflow Candidate in IRAS 16119--5048

Yongquan Luo, Jianjun Zhou, Tie Liu +24

We present a multiwavelength study of the massive star formation region IRAS 16119-5048 (I16119) using ALMA ATOMS Band 3 and QUARKS Band 6 observations, complemented by archival AT…

astro-ph.GA2026

The mass-dependent interplay of active galacitc nuclei and supernova feedback in shaping the -- relation of early-type galaxies

Haojie Xia, Feng Yuan, Bocheng Zhu +4

The observed X-ray luminosity--temperature (--) relation of hot gas in early-type galaxies deviates significantly from the prediction of purely gravitational heating,…

astro-ph.GA2026

Megaparsec-Scale Neutral Hydrogen Flows in the Neighborhood of Hickson Compact Group 100

Qingzheng Yu, Taotao Fang, Enrico M. Di Teodoro +2

The evolution of galaxies is strongly influenced by their ability to exchange gas with their surroundings, yet direct observational constraints on these processes remain scarce. Us…

astro-ph.GA2026

The FAST All Sky HI Survey DR2: the FASHI Catalog and the HI Mass Function

Chuan-Peng Zhang, Ming Zhu, Peng Jiang +8

The FAST All Sky HI Survey (FASHI) conducted with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) has mapped of the sky north of DEC $…

astro-ph.GA2026

Euclid Q1 reveals spatial variations of the extinction law in the dense cloud LDN 1641

Rui Chen, Shu Wang, Xiaodian Chen +1

Dust extinction laws are essential for precision photometry and provide a direct probe of grain properties, but their behaviour in dense molecular clouds remains poorly constrained…

astro-ph.GA2026★ 2 cited

Revisiting the mass metallicity relation and the fundamental metallicity relation of dwarf galaxies at cosmic noon with NIRISS

Xianlong He, Zihao Li, Xin Wang +6

We extend the stellar-mass gas-phase metallicity relation (MZR) at down to the extremely low-mass regime using 183 galaxies with , based…

astro-ph.GA2026

The evolution of C4H and c-C3H2 in molecular cores

Yijia Liu, Junzhi Wang, Ningyu Tang +8

Linear C4H and cyclic c-C3H2, as small unsaturated hydrocarbons, are the key precursors to complex organic molecules and are critical components of the interstellar medium. We pres…

astro-ph.GA2026

The multiple corrugations in the Galactic disk derived from the LAMOST and Gaia survey data

Jifei Wang, Zhuohan Li, Chengdong Li +6

Large spectroscopic and astrometric surveys have revealed complex wave-like features in the Milky Way disk, suggesting that its kinematic and chemical structures are shaped by time…

astro-ph.GA2026★ 1 cited

Scale-dependent surface and volume density properties of filaments in molecular clouds

Guo-Yin Zhang, Alexander Men'shchikov, Jin-Zeng Li

We present a systematic analysis of scale-dependent properties of filamentary structures in seven nearby molecular clouds Taurus, Ophiuchus, Perseus, Orion A, California, IC 51…

astro-ph.GA2026★ 1 cited

Mapping the Milky Way with Gaia Bp/Rp spectra-IV: the broken and asymmetric density profile of the stellar disk traced by a large sample of red clumps

Wenbo Wu, Yuqin Chen, Jianhui Lian +10

This study explores the density profile of the stellar disk, radially and azimuthally, based on approximately 8.4 million red clump stars selected from Gaia Bp/Rp spectra. After co…

astro-ph.GA2026

Molecular Clouds at the Edge of the Galaxy II. Physical properties and scaling relations

C. S. Luo, X. D. Tang, C. Henkel +22

The outer Galaxy presents an optimal setting for investigating molecular clouds and star formation in environments with low metallicity. A total of 72 Galactic edge clouds were sur…

astro-ph.GA2026

SDSS-V LVM: Verifying what, and where, the 'Galactic Center' Lobe is

K. Kreckel, O. V. Egorov, N. Drory +23

The so-called 'Galactic Center' Lobe (GCL) is an extended (~1 deg) radio continuum feature situated above the Galactic Plane, for which the literature contains varying claims about…

astro-ph.GA2026★ 1 cited

Discovery of low-redshift analogues to "Little Red Dots" in DESI: A later evolutionary stage of compact LRDs?

Weiyu Ding, Xu Kong, Wei-Jian Guo +8

The James Webb Space Telescope (JWST) has recently discovered a population of compact, red sources at z > 4 known as "Little Red Dots" (LRDs). They are characterized by their V-sha…

astro-ph.GA2026

Direct N-body simulations of rotating and extremely massive Population III star clusters

Kai Wu, Ataru Tanikawa, Francesco Flammini Dotti +6

Aims. We present eight direct N-body simulations with NBODY6++GPU of extremely massive, initially rotating Population III star clusters with 1.01 x 10^5 stars. Methods. Our models…

astro-ph.GA2026

Full-polarization millimeter wavelength variability of Sagittarius A* during the 2018 EHT campaign

Ezequiel Albentosa-Ruiz, Jasmin E. Washington, Nicola Marchili +272

Sagittarius A* (Srg A*), the supermassive black hole at the center of the Milky Way, provides a unique laboratory to study accretion dynamics and plasma processes near the event ho…

astro-ph.GA2026★ 1 cited

Revisiting the Excess of Bar-like Structures in TNG50 Early-type Galaxies: Consistency and Tension with Observations

Hangci Du, Yougang Wang, Junqiang Ge

The IllustrisTNG simulation suite, particularly TNG50, was reported to have generated a notable population of elongated, bar-like structures within galaxies classified as Early-Typ…