Cheng Cheng

Star formation and morphological trends in the Antlia cluster: Probing environmental influence out to 5R200

Ciria Lima-Dias, Antonela Monachesi, Gissel P. Montaguth +48

Galaxy evolution in dense environments such as clusters is strongly affected by environmental processes that can alter both morphology and star formation activity. We investigate t…

An HI study of a large sample of ultra-diffuse galaxies

Ruilei Zhou, Ming Zhu, Chuan-Peng Zhang +5

By cross-matching the SMUDGes catalog with the FASHI and ALFALFA HI surveys, we construct an HI-detected sample of 112 ultra-diffuse galaxies (UDGs) and 48 low-surface-brightness (…

Ly $α$ Escape in JWST/NIRCam F430M-Selected H $α$ Emitters at $z ≃ 5.5$

Cheng Cheng, Zhen-Ya Zheng, Chunyan Jiang +8

We study the Ly $α$ escape fraction ( $f_{esc}$ ) in an H $α$ -selected sample of star-forming galaxies at $z ≃ 5.5$ , identified via JWST/NIRCam F430M excess and covered by archi…

HI Depletion Begins Well Beyond the Virial Radius: A FAST Stacking Study of 36 Galaxy Clusters to 5R200

Cheng Cheng, Chuan-Peng Zhang, Edo Ibar +10

We present a stacking study of the neutral atomic hydrogen (HI) content in and around 36 local galaxy clusters at $z < 0.07$ , using a combination of the FAST all sky HI survey (FASHI…

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…

HI-detected Dwarf Galaxies in the FASHI Survey: Insights from Single- and Double-Peaked Emission-Line Samples

Cheng Cheng, Jia-Sheng Huang, Wei Du +4

We present a sample of low HI mass dwarf galaxies ( $M_{HI} < 1 0^{8} M_{⊙}$ ) detected by The FAST All Sky HI Survey (FASHI) project. Due to the faint and irregular morphology of…

Detecting Galactic Rings in the DESI Legacy Imaging Surveys with Semi-Supervised Deep Learning

Jianzhen Chen, Zhijian Luo, Cheng Cheng +3

The ring structures of disk galaxies are vital for understanding galaxy evolution and dynamics. However, due to the scarcity of ringed galaxies and challenges in their identificati…

Probing Obscured Star Formation in Galaxy Clusters Using JWST Medium Band Images: 3.3 $μ m$ PAH Emitter Sample in Abell 2744

Cheng Cheng, Xin Wang, Piaoran Liang +7

Star-forming galaxies in galaxy clusters play a crucial role in understanding the advanced stages of galaxy evolution within dense environments. We present a sample of 3.3 $μ$ m PAH-…

FAST Reveals the Extended HI Halo and Accretion Signatures of NGC2683

Qian Jiao, Ming Zhu, Bernd Vollmer +5

We present the results of our recent HI observations conducted on the edge-on galaxy NGC2683 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). In comparison t…

Ultra Diffuse Dwarf Galaxies Hosting Pseudo-bulges

Yu Rong, Hong-Xin Zhang, Cheng Cheng +5

By analyzing data from DESI Legacy Imaging Survey of the dwarf galaxies in the Arecibo Legacy Fast Alfa Survey, we have identified five ultra-diffuse galaxies (UDGs) featuring cent…

Ionized and cold gas components in low surface brightness galaxy AGC 102004

Tian-Wen Cao, Zi-Jian Li, Pei-Bin Chen +7

We present the integral field spectroscopic observations of ionized gas (H $α$ and [{\ion{N}{II}}]) using the PCWI, along with deep CO(2-1) observations by the $^\backprime\bar{\rm…

Birds of a Feather: Resolving Stellar Mass Assembly With JWST/NIRCam in a Pair of Kindred $z \sim 2$ Dusty Star-forming Galaxies Lensed by the PLCK G165.7+67.0 Cluster

Patrick S. Kamieneski, Brenda L. Frye, Rogier A. Windhorst +38

We present a new parametric lens model for the G165.7+67.0 galaxy cluster, which was discovered with $P l an c k$ through its bright submillimeter flux, originating from a pair of extr…