69 citations · 361 across the 26 of their papers we have counts for
26 papers
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 , using a combination of the FAST all sky HI survey (FASHI…
Star Formation Drives Production of Low Energy Cosmic Rays
Ningyu Tang, Jiahao Liu, Di Li +18
For over a century, the origin of low-energy cosmic rays (LECRs), the dominant heaters and ionizers of dense interstellar gas, remains elusive owing to solar modulation and uncerta…
Insights into the Physical Nature of Polar Ring Galaxies from H I Observations
Niankun Yu, Han Zheng, Chao-Wei Tsai +10
Polar ring galaxies (PRGs) host an outer ring of gas and stars oriented nearly perpendicular to the main stellar body. They represent extreme examples of misaligned systems and pro…
Investigating the Impacts of AGN Activities on Dwarf Galaxies with FAST HI Observations
Hong-Ying Chen, Chao-Wei Tsai, Pei Zuo +9
We present the results of Hi line observations towards 26 Active Galactic Nuclei (AGN)-hosting and one star-forming dwarf galaxies (Mstar < 10^9.5 Msun) with the 19-beam spectral l…
The evolution of CH in Planck Galactic Cold Clumps
Gan Luo, Arshia M. Jacob, Marco Padovani +6
Methylidyne (CH) has long been considered a reliable tracer of molecular gas in the low-to-intermediate extinction range. Although extended CH 3.3 GHz emission is commonly observed…
An H Cloud in the HI Tail: Recent Star Formation in the Outskirts of NGC 4258 Revealed by Nanshan 1-m Telescope
Cheng Cheng, Jia-Sheng Huang, Peng Wei +12
We present first-light deep H imaging taken with the Nanshan 1-meter wide-field telescope on the local galaxy NGC 4258, alongside archival data from Hubble Space telescope (HST)…
The Host Galaxy of the Hyperactive Repeating FRB 20240114A: Behind a Galaxy Cluster
Xiang-Lei Chen, Chao-Wei Tsai, Di Li +16
We report on the optical spectroscopic observations of the host galaxy of the hyperactive repeating fast radio burst, FRB 20240114A. The host galaxy is a dwarf galaxy at a redshift…
CRAFTS for HI cosmology: I. data processing pipeline and validation tests
Wenxiu Yang, Laura Wolz, Yichao Li +20
We present the calibration procedures and validation of source measurement with the data of the Commensal Radio Astronomy FAST Survey (CRAFTS) for \HI intensity mapping by the Five…
FAST Observations of Four Comets to Search for the Molecular Line Emissions between 1.0 and 1.5 GHz Frequencies
Long-Fei Chen, Chao-Wei Tsai, Jian-Yang Li +11
We used the Five-hundred-meter Aperture Spherical radio Telescope (FAST) to search for the molecular emissions in the L-band between 1.0 and 1.5 GHz toward four comets, C/2020 F3 (…
The CO-dark molecular gas in the cold HI arc
Gan Luo, Di Li, Zhi-yu Zhang +6
The CO-dark molecular gas (DMG), which refers to the molecular gas not traced by CO emission, is crucial for the evolution of the interstellar medium (ISM). While the gas propertie…
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-…
H I content of selected mid-infrared bright, starburst blue compact dwarf galaxies
Yogesh Chandola, Di Li, Chao-Wei Tsai +10
We report measurements of H I content in 11 nearby, actively star-forming, blue compact dwarf galaxies (BCDs) from 21 cm observations with the Arecibo telescope. These BCDs, select…
Opacities of dense gas tracers in galactic massive star-forming regions
Shu Liu, Junzhi Wang, Fei Li +5
Optical depths of dense molecular gas are commonly used in Galactic and extragalactic studies to constrain the dense gas mass of the clouds or galaxies. The optical depths are ofte…
GMRT H I mapping of mid-infrared bright Blue Compact Dwarf Galaxies W1016+3754 & W2326+0608
Yogesh Chandola, Chao-Wei Tsai, Di Li +3
We present the results from deep 21 cm H I mapping of two nearby blue compact dwarf galaxies (BCDGs), W1016+3754 and W2326+0608, using the Giant Metrewave Radio Telescope (GMRT). T…
Abundance ratios of OH/CO and HCO+/CO as probes of the cosmic ray ionization rate in diffuse clouds
Gan Luo, Zhiyu Zhang, Thomas G. Bisbas +6
The cosmic-ray ionization rate (CRIR, ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current m…
Dependence of Chemical Abundance on the Cosmic Ray Ionization Rate in IC 348
Gan Luo, Zhi-Yu Zhang, Thomas G. Bisbas +8
Ions (e.g., H, HO) have been used extensively to quantify the cosmic-ray ionization rate (CRIR) in diffuse sightlines. However, measurements of CRIR in low-to-interme…
Finding Quasars behind the Galactic Plane. II. Spectroscopic Identifications of 204 Quasars at
Yuming Fu, Xue-Bing Wu, Linhua Jiang +21
Quasars behind the Galactic plane (GPQs) are important astrometric references and valuable probes of Galactic gas, yet the search for GPQs is difficult due to severe extinction and…
Massive Galaxy Mergers Have Distinctive Global HI Profiles
Pei Zuo, Luis C. Ho, Jing Wang +2
The global 21 cm HI emission-line profile of a galaxy encodes valuable information on the spatial distribution and kinematics of the neutral atomic gas. Galaxy interactions signifi…
OH Evolution in Molecular Clouds
Ningyu Tang, Di Li, Nannan Yue +7
We have conducted OH 18 cm survey toward 141 molecular clouds in various environments, including 33 optical dark clouds, 98 Planck Galactic cold clumps (PGCCs) and 10 Spitzer dark…
CO observations of major merger pairs at z=0: Molecular gas mass and star formation
Ute Lisenfeld, Cong Kevin Xu, Yu Gao +3
We present CO observations of 78 spiral galaxies in local merger pairs. These galaxies representa subsample of a Ks-band selected sample consisting of 88 close major-merger pairs (…
SCOPE: SCUBA-2 Continuum Observations of Pre-protostellar Evolution - Survey Description and Compact Source Catalogue
D. J. Eden, Tie Liu, Kee-Tae Kim +157
We present the first release of the data and compact-source catalogue for the JCMT Large Program SCUBA-2 Continuum Observations of Pre-protostellar Evolution (SCOPE). SCOPE consist…
Catching the Birth of a Dark Molecular Cloud for the First Time
Pei Zuo, Di Li, J. E. G. Peek +5
The majority of hydrogen in the interstellar medium (ISM) is in atomic form. The transition from atoms to molecules and, in particular, the formation of the H molecule, is a ke…
HI Observations of Major-Merger Pairs at z = 0: atomic gas and star formation
Pei Zuo, Cong K. Xu, Min S. Yun +3
We present a study of the HI gas content of a large K-band selected sample of 88 close major-merger pairs of galaxies (H-KPAIR) which were observed by . We obtained t…
The TOP-SCOPE survey of Planck Galactic Cold Clumps: Survey overview and results of an exemplar source, PGCC G26.53+0.17
Tie Liu, Kee-Tae Kim, Mika Juvela +11
The low dust temperatures (<14 K) of Planck Galactic Cold Clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. TOP-SCOPE i…