Showing 2024 · astro-ph.GAShow all

21 papers · 2 filters

astro-ph.GA2024★ 1 cited

Not just PAH: why galaxies turn red in the Near-Infrared

Benedetta Vulcani, Tommaso Treu, Matthew Malkan +11

We measure the spectral properties of a sample of 20 galaxies at z~0.35 selected for having surprisingly red JWST/NIRCAM F200W-F444W colors. 19 galaxies were observed with JWST/NIR…

astro-ph.GA2024★ 6 cited

Overdensity of Lyman-Break Galaxy Candidates Around Hot Dust-Obscured Galaxies

Dejene Zewdie, Roberto J. Assef, Trystan Lambert +15

Hot dust-obscured galaxies (Hot DOGs), are a family of hyper-luminous, heavily obscured quasars. A number of studies have shown that these objects reside in significantly overdense…

astro-ph.GA2024★ 3 cited

Dynamic Massive Star Formation: Radio Flux Variability in UCHII Regions

A. Y. Yang, M. A. Thompson, J. S. Urquhart +7

Context: Theoretical models of early accretion during the formation process of massive stars have predicted that HII regions exhibit radio variability on timescales of decades. How…

astro-ph.GA2024★ 2 cited

Lensed fast radio bursts as a probe of time-varying gravitational potential induced by wave dark matter

Ran Gao, Shuxun Tian, Zhengxiang Li +4

Ultralight bosonic wave dark matter (DM) is preponderantly contesting the conventional cold DM paradigm in predicting diverse and rich phenomena on small scales. For a DM halo made…

astro-ph.GA2024★ 3 cited

Measuring the Diffuse Interstellar Bands at 5780, 5797, and 6614 Å in Low-Resolution Spectra of Cool Stars from LAMOST

Xiao-Xiao Ma, Jian-Jun Chen, A-Li Luo +7

We attempt to measure the DIBs 5780, 5797 and 6614 in over two million low-resolution spectra of cool stars from LAMOST. Based on the DIB measurements, the correlation bet…

astro-ph.GA2024★ 27 cited

The formation and survival of the Milky Way's oldest stellar disk

Maosheng Xiang, Hans-Walter Rix, Hang Yang +3

It remains a mystery when our Milky Way first formed a stellar disk component that survived and maintained its disk structure from subsequent galaxy mergers. We present a study of…

astro-ph.GA2024

Implications for galaxy property estimation revealed by CO luminosity-FWHM relations in local star-forming galaxies

Yi-Han Wu, Jun-Feng Wang, Xiao-Hu Li +6

This study explores a relationship between the CO luminosity-full width at half-maximum linewidth linear relation (i.e. the CO LFR) and mean galaxy property of the local star-formi…

astro-ph.GA2024★ 28 cited

The Dual Nature of GHZ9: Coexisting Active Galactic Nuclei and Star Formation Activity in a Remote X-ray Source at z = 10.145

Lorenzo Napolitano, Marco Castellano, Laura Pentericci +33

We present James Webb Space Telescope (JWST)/NIRSpec PRISM spectroscopic characterization of GHZ9 at z= 10.145 0.010, currently the most distant source detected by the Chandr…

astro-ph.GA2024★ 4 cited

CO spectra of the ISM in the Host Galaxies of the Most Luminous WISE-Selected AGNs

Lee R. Martin, Andrew W. Blain, Tanio Díaz-Santos +7

We present observations of mid-J J=4-3 or J=5-4 carbon monoxide (CO) emission lines and continuum emission from a sample of ten of the most luminous log(L/L_solar)~14 Hot Dust-Obsc…

astro-ph.GA2024★ 5 cited

Prospects for detecting cosmic filaments in Lyman-alpha emission across redshifts

Yizhou Liu, Liang Gao, Shihong Liao +1

The standard CDM cosmological model predicts that a large amount of diffuse neutral hydrogen distributes in cosmic filaments, which could be mapped through Lyman-alpha (Ly$α…

astro-ph.GA2024★ 20 cited

MSA-3D: Metallicity Gradients in Galaxies at with JWST/NIRSpec Slit-stepping Spectroscopy

Mengting Ju, Xin Wang, Tucker Jones +14

The radial gradient of gas-phase metallicity is a powerful probe of the chemical and structural evolution of star-forming galaxies, closely tied to disk formation and gas kinematic…

astro-ph.GA2024

Assembly History and Internal Structure of Cluster Cold Dark Matter Haloes

Qingxiang Chen, Shihong Liao, Jie Wang +1

We use the Phoenix simulations to study the mass assembly history and internal structures of cluster dark matter haloes (). We…

astro-ph.GA2024★ 3 cited

Detailed Mapping of the Galactic Disk Structure in the Solar Neighborhood through LAMOST K Dwarfs

Xi-Can Tang, Hao Tian, Jing Li +4

The Galactic disk is one of the main components of the Milky Way, which contributes most of the luminosity. Its structure is essential for understanding the formation and evolution…

astro-ph.GA2024★ 16 cited

A slightly oblate dark matter halo revealed by a retrograde precessing Galactic disk warp

Yang Huang, Qikang Feng, Tigran Khachaturyants +7

The shape of the dark matter (DM) halo is key to understanding the hierarchical formation of the Galaxy. Despite extensive efforts in recent decades, however, its shape remains a m…

astro-ph.GA2024★ 4 cited

On Variation of Light Curves and Broad Emission Lines for Periodic QSOs from co-rotating Supermassive binary black holes in elliptical orbits

Junqiang Ge, Youjun Lu, Changshuo Yan +1

Context. Periodic QSOs are considered as candidates of supermassive binary black hole (BBH) systems in galactic centers. Further confirmation of these candidates may require differ…

astro-ph.GA2024★ 3 cited

A New Tidal Stream Discovered in Gaia DR3

Hao Tian, Chao Liu, Changqing Luo +2

Thanks to the precise astrometric measurements of proper motions by the Gaia mission, a new tidal stellar stream has been discovered in the northern hemisphere. The distribution of…

astro-ph.GA2024★ 9 cited

The ALMaQUEST Survey XV: The Dependence of the Molecular-to-Atomic Gas Ratios on Resolved Optical Diagnostics

Niankun Yu, Zheng Zheng, Chao-Wei Tsai +14

The atomic-to-molecular gas conversion is a critical step in the baryon cycle of galaxies, which sets the initial conditions for subsequent star formation and influences the multi-…

astro-ph.GA2024★ 4 cited

The influence of baryons on low-mass haloes

Haonan Zheng, Sownak Bose, Carlos S. Frenk +6

The Voids-within-Voids-within-Voids (VVV) project used dark-matter-only simulations to study the abundance and structure of dark matter haloes over the full mass range populated in…

astro-ph.GA2024★ 15 cited

JWST's first glimpse of a z > 2 forming cluster reveals a top-heavy stellar mass function

Hanwen Sun, Tao Wang, Ke Xu +11

Clusters and their progenitors (protoclusters) at z = 2-4, the peak epoch of star formation, are ideal laboratories to study the formation process of both the clusters themselves a…

astro-ph.GA2024

The Star Formation History in Local Group Galaxies. I. Ten Dwarf Galaxies

Yi Ren, Biwei Jiang, Yuxi Wang +2

The star formation histories (SFHs) of galaxies provide valuable insights into galaxy evolution and stellar physics. Understanding the SFHs enables the study of chemical enrichment…

astro-ph.GA2024★ 28 cited

HiFAST: an HI data calibration and imaging pipeline for FAST

Yingjie Jing, Jie Wang, Chen Xu +30

The Five-hundred-meter Aperture Spherical radio Telescope (FAST) has the largest aperture and a 19-beam L-band receiver, making it powerful for investigating the neutral hydrogen a…