Search Results - "Zhang, Yu Zhi"
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Stellar populations dominated by massive stars in dusty starburst galaxies across cosmic time
Published in Nature (London) (01-06-2018)“…All measurements of cosmic star formation must assume an initial distribution of stellar masses—the stellar initial mass function—in order to extrapolate from…”
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The evolution of CNO isotopes: the impact of massive stellar rotators
Published in Monthly notices of the Royal Astronomical Society (01-12-2019)“…Chemical abundances and abundance ratios measured in galaxies provide precious information about the mechanisms, modes, and time-scales of the assembly of…”
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A massive stellar bulge in a regularly rotating galaxy 1.2 billion years after the Big Bang
Published in Science (American Association for the Advancement of Science) (12-02-2021)“…Cosmological models predict that galaxies forming in the early Universe experience a chaotic phase of gas accretion and star formation, followed by gas…”
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New places and phases of CO-poor/C i-rich molecular gas in the Universe
Published in Monthly notices of the Royal Astronomical Society (01-08-2018)“…Abstract In this work, we extend the work on the recently discovered role of Cosmic Rays (CRs) in regulating the average CO/$\rm H_2$ abundance ratio in…”
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Cosmic-ray Induced Destruction of CO in Star-forming Galaxies
Published in The Astrophysical journal (20-04-2017)“…We explore the effects of the expected higher cosmic ray (CR) ionization rates on the abundances of carbon monoxide (CO), atomic carbon (C), and ionized carbon…”
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A Cuspy Dark Matter Halo
Published in The Astrophysical journal (01-03-2021)“…The cusp–core problem is one of the main challenges of the cold dark matter paradigm on small scales; the density of a dark matter halo is predicted to rise…”
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Revisiting the Extended Schmidt Law: The Important Role of Existing Stars in Regulating Star Formation
Published in The Astrophysical journal (01-02-2018)“…We revisit the proposed extended Schmidt law, which posits that the star formation efficiency in galaxies depends on the stellar mass surface density, by…”
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Orbitofrontal control of visual cortex gain promotes visual associative learning
Published in Nature communications (03-06-2020)“…The orbitofrontal cortex (OFC) encodes expected outcomes and plays a critical role in flexible, outcome-guided behavior. The OFC projects to primary visual…”
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Resolved Neutral Carbon Emission in Nearby Galaxies: [C i] Lines as Total Molecular Gas Tracers
Published in The Astrophysical journal (01-08-2019)“…We present maps of atomic carbon [C i]( ) and [C i]( ) emission (hereafter [C i] (1−0) and [C i] (2−1), respectively) at a linear resolution ∼1 kpc scale for a…”
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Dense gas properties around the centre of the Circinus galaxy
Published in Monthly notices of the Royal Astronomical Society (01-01-2024)“…ABSTRACT Studies of spatial distribution, kinematics, and physical structure of dense molecular gas in the centres of galaxies is crucial in understanding the…”
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A SiO J = 5 → 4 Survey Toward Massive Star Formation Regions
Published in The Astrophysical journal (10-06-2019)“…We performed a survey in the SiO J = 5 → 4 line toward a sample of 199 Galactic massive star-forming regions at different evolutionary stages with the…”
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hucMSC-derived exosomes attenuate colitis by regulating macrophage pyroptosis via the miR-378a-5p/NLRP3 axis
Published in Stem cell research & therapy (22-07-2021)“…Human umbilical cord mesenchymal stem cell (hucMSC)-derived exosomes are recognized as novel cell-free therapeutic agents for inflammatory bowel disease (IBD),…”
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Molecular Environment of the Thermal Composite Supernova Remnant G352.7-0.1
Published in The Astrophysical journal (01-08-2023)“…Galactic supernova remnants (SNRs) play an important role in our understanding of supernovae and their feedback on the interstellar environment. SNR G352.7-0.1…”
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Dependence of Chemical Abundance on the Cosmic-Ray Ionization Rate in IC 348
Published in The Astrophysical journal (01-01-2023)“…Ions (e.g., H 3 + , H 2 O + ) have been used extensively to quantify the cosmic-ray ionization rate (CRIR) in diffuse sightlines. However, measurements of the…”
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Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds
Published in The Astrophysical journal (01-04-2023)“…The cosmic-ray ionization rate (CRIR, ζ 2 ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds…”
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Validation and comparison of three newly-released Thyroid Imaging Reporting and Data Systems for cancer risk determination
Published in Endocrine (01-05-2019)“…Purpose To validate and compare diagnostic value of three newly-released Thyroid Imaging Reporting and Data Systems (TIRADS) for cancer risk determination…”
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Properties of Dense Molecular Gas along the Major Axis of M82
Published in The Astrophysical journal (01-07-2022)“…Dense gas is important for galaxy evolution and star formation. Optically thin dense-gas tracers, such as isotopologues of HCN, HCO + , etc., are very helpful…”
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The Variation in the Galaxy-wide Initial Mass Function for Low-mass Stars: Modeling and Observational Insights
Published in The Astrophysical journal (01-07-2024)“…The stellar initial mass function (IMF) characterizes the mass distribution of newly formed stars in various cosmic environments, serving as a fundamental…”
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Cloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observations
Published in The Astrophysical journal (01-05-2017)“…We have modified the iterative procedure introduced by Lin et al., to systematically combine the submillimeter images taken from ground-based (e.g., CSO, JCMT,…”
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Dense Gas and Star Formation in Nearby Infrared-bright Galaxies: APEX Survey of HCN and HCO+ J = 2 → 1
Published in The Astrophysical journal (01-09-2022)“…Both Galactic and extragalactic studies of star formation suggest that stars form directly from dense molecular gas. To trace such high volume density gas, HCN…”
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