Jianan Li

ORCID: 0000-0002-1815-4839
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Galaxies: Formation, Evolution, Phenomena
  • Astrophysics and Star Formation Studies
  • Astronomy and Astrophysical Research
  • Stellar, planetary, and galactic studies
  • Astrophysical Phenomena and Observations
  • Astrophysics and Cosmic Phenomena
  • Mass Spectrometry Techniques and Applications
  • E-commerce and Technology Innovations
  • Analytical chemistry methods development
  • Gamma-ray bursts and supernovae
  • Laser-induced spectroscopy and plasma
  • Photorefractive and Nonlinear Optics
  • Spectroscopy and Laser Applications
  • Pharmacological Effects of Natural Compounds
  • IL-33, ST2, and ILC Pathways
  • Magnetic Field Sensors Techniques
  • Radio Astronomy Observations and Technology
  • Bone Tissue Engineering Materials
  • Electrical Fault Detection and Protection
  • Advanced Optical Sensing Technologies
  • Material Dynamics and Properties
  • Spacecraft and Cryogenic Technologies
  • Advanced X-ray Imaging Techniques
  • Scientific Research and Discoveries
  • Private Equity and Venture Capital

Tsinghua University
2008-2025

Peking University
2019-2024

Kavli Institute for Theoretical Sciences
2019-2024

China University of Mining and Technology
2024

Westlake University
2024

Fujian Normal University
2023

Lingnan Normal University
2023

Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine
2022

Beijing University of Chinese Medicine
2022

China-Japan Friendship Hospital
2022

Natural killer (NK) cells play indispensable roles in innate immune responses against tumor progression. To depict their phenotypic and functional diversities the microenvironment, we perform integrative single-cell RNA sequencing analyses on NK from 716 patients with cancer, covering 24 cancer types. We observed heterogeneity cell composition a tumor-type-specific manner. Notably, have identified group of tumor-associated that are enriched tumors, show impaired anti-tumor functions,...

10.1016/j.cell.2023.07.034 article EN cc-by Cell 2023-08-21

We present a multi-line survey of the interstellar medium (ISM) in two $z>6$ quasar (QSO) host galaxies, PJ231-20 ($z=6.59$) and PJ308-21 ($z=6.23$), their companion galaxies. Observations were carried out using Atacama Large (sub-)Millimeter Array (ALMA). targeted eleven transitions including atomic fine structure lines (FSLs) molecular lines: [NII]$_{\rm 205\mu m}$, [CI]$_{\rm 369\mu CO ($J_{\rm up} = 7, 10, 15, 16$), H$_2$O $3_{12}-2_{21}$, $3_{21}-3_{12}$, $3_{03}-2_{12}$, OH$_{\rm...

10.1051/0004-6361/202039696 article EN Astronomy and Astrophysics 2021-06-07

We investigate the molecular gas content of z~6 quasar host galaxies using IRAM / Northern Extended Millimeter Array. target 3mm dust continuum, and line emission from CO(6-5), CO(7-6), [CI]2-1 in 10 infra-red-luminous quasars that have been previously studied their 1mm continuum [CII] emission. detect CO(7-6) at various degrees significance all targeted sources, thus doubling number such detections quasars. The to flux density ratios are consistent with a modified black body spectrum...

10.1051/0004-6361/202142871 article EN Astronomy and Astrophysics 2022-03-18

Abstract Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of “A2744-DSG- z 3,” a dusty, multiarm spiral at = 3.059 using James Webb Space Telescope (JWST) NIRISS imaging grism spectroscopy. A2744-DSG-z3 was discovered as gravitationally lensed submillimeter with Atacama Large Millimeter/submillimeter Array (ALMA). This is most distant stellar structure seen thus far, consistent cosmological simulations that suggest ≈ 3...

10.3847/2041-8213/aca652 article EN cc-by The Astrophysical Journal Letters 2022-12-27

We report Atacama Large Millimeter/submillimeter Array (ALMA) observations of CO $(8-7)$, $(9-8)$, $\rm H_{2}O (2_{0,2}-1_{1,1})$ and OH^{+} (1_{1}-0_{1})$ NOrthern Extended Millimeter (NOEMA) $(5-4)$, $(6-5)$, $(12-11)$ $(13-12)$ towards the $z = 6.003$ quasar SDSS J231038.88+185519.7, aiming to probe physical conditions molecular gas content this source. present best sampled spectral line energy distribution (SLED) at 6.003$, analyzed it with radiative transfer code MOLPOP-CEP. Fitting...

10.3847/1538-4357/ab65fa article EN The Astrophysical Journal 2020-02-01

Abstract Observing the interstellar medium (ISM) in z ≳ 6 quasar host galaxies is essential for understanding coevolution between supermassive black holes and their hosts. To probe gas physical conditions search imprints of active galactic nuclei (AGNs) on ISM, we report ALMA observations [N ii ] 122 μ m [O i 146 lines underlying continuum from = 6.003 SDSS J231038.88+185519.7. Together with previous [C 158 iii 88 observations, use ratios these fine-structure to ISM properties. Similar other...

10.3847/1538-4357/ababac article EN The Astrophysical Journal 2020-09-01

Abstract We carry out a series of deep Karl G. Jansky Very Large Array (VLA) S -band observations sample 21 quasars at z ∼ 6. The new expand the searches radio continuum emission to optically faint quasar population highest redshift with rest-frame <?CDATA $4400\,\mathring{\rm A} $?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mn>4400</mml:mn> <mml:mspace width="0.25em" /> <mml:mi>Å</mml:mi> </mml:math> luminosities down $3\times {10}^{11}\ {L}_{\odot...

10.3847/1538-4357/abd3a8 article EN The Astrophysical Journal 2021-02-01

Abstract We present observations using the Northern Extended Millimetre Array (NOEMA) of CO and H 2 O emission lines underlying dust continuum in two quasars at z ∼ 6, i.e., P215−16 = 5.78 J1429+5447 6.18. Notably, among all published spectral line energy distributions (SLEDs) systems reveal highest lowest levels excitation, respectively. Our radiative transfer modeling SLED suggests that molecular gas heated by active galactic nuclei could be a plausible origin for high excitation. For...

10.3847/1538-4357/ad1754 article EN cc-by The Astrophysical Journal 2024-02-01

We report ALMA and ACA observations of atomic carbon ([\ion{C}{1}]$(1-0)$) dust continuum in 10 Enormous Ly$\alpha$ Nebulae hosting ultra-luminous Type-I QSOs at $z=2.2-2.5$, as part the SUrvey Protocluster ELANe Revealing CO/CI Detected CGM (SUPERCOLD-CGM). detect [\ion{C}{1}]$(1-0)$ all ten five companion galaxies. find that companions have higher gas densities more intense radiation fields than Luminous Infrared galaxies high-$z$ main sequence galaxies, with highest values found QSOs. By...

10.48550/arxiv.2502.05805 preprint EN arXiv (Cornell University) 2025-02-09

<title>Abstract</title> Cold and cool gas (T ≤ 10<sup>4</sup> K) in the circumgalactic medium (CGM) its interaction with galaxies remain poorly understood. Simulations predict that cold flows into through cosmic filaments, determining disk formation galaxy evolution. The accretion modes CGM their dependence on dark matter halo mass redshift puzzling. Resolving kiloparsec-scale kinematics dynamics of interacting disk, dust, metals different environments is particularly lacking at z &gt; 2....

10.21203/rs.3.rs-5837077/v1 preprint EN cc-by Research Square (Research Square) 2025-02-20

Cold and cool gas (T $\leq 10^4$ K) in the circumgalactic medium (CGM) its interaction with galaxies remain poorly understood. Simulations predict that cold flows into through cosmic filaments, determining disk formation galaxy evolution. The accretion modes CGM their dependence on dark matter halo mass redshift puzzling. Resolving kiloparsec-scale kinematics dynamics of interacting disk, dust, metals different environments is particularly lacking at z > 2. Here we report two disturbed...

10.48550/arxiv.2502.14705 preprint EN arXiv (Cornell University) 2025-02-20

A new bis-bidentate pyrimidyl-substituted nitronyl nitroxide radical and two cobalt(<sc>ii</sc>) complexes of this ligand were synthesized characterized.

10.1039/c6cc00915h article EN Chemical Communications 2016-01-01

Direct observations of low-mass, low-metallicity galaxies at $z\gtrsim4$ provide an indispensable opportunity for detailed inspection the ionization radiation, gas flow, and metal enrichment in sources similar to those that reionized Universe. Combining James Webb Space Telescope (JWST), VLT/MUSE, ALMA, we present a strongly lensed, low-mass ($\approx 10^{7.6}$ ${\rm M}_\odot$) galaxy $z=3.98$ (also see Vanzella et al. 2022). We identify strong narrow nebular emission, including CIV...

10.3847/2041-8213/aca1c4 article EN cc-by The Astrophysical Journal Letters 2023-02-01

We present Atacama Large Millimiter/submillimiter Array (ALMA) observations of eight highly excited CO (J$_{\rm up}>8$) lines and continuum emission in two $z\sim6$ quasars: SDSS J231038.88+185519.7 (hereafter J2310), for which CO(8-7), CO(9-8), CO(17-16) have been observed, ULAS J131911.29+095951.4 (J1319), observed the CO(14-13), CO(19-18) lines. The both quasars arises from a compact region ($< 0.9$ kpc). By assuming modified black-body law, we estimate dust masses Log$(M_{\rm...

10.1093/mnras/stz2410 article EN Monthly Notices of the Royal Astronomical Society 2019-09-11

The link between the circum-galactic medium (CGM) and stellar growth of massive galaxies at high-$z$ depends on properties widespread cold molecular gas. As part SUPERCOLD-CGM survey (Survey Protocluster ELANe Revealing CO/\ci\ in Ly$\alpha$-Detected CGM), we present radio-loud QSO Q1228+3128 $z=2.2218$, which is embedded an enormous Ly$\alpha$ nebula. ALMA+ACA observations CO(4-3) reveal both a outflow, more extended gas reservoir across $\sim$100 kpc CGM each containing mass M$_{\rm...

10.3847/2041-8213/ac390d article EN cc-by The Astrophysical Journal Letters 2021-11-25

Abstract To understand how massive galaxies at high z coevolve with enormous reservoirs of halo gas, it is essential to study the coldest phase circumgalactic medium (CGM), which directly relates stellar growth. The SUPERCOLD-CGM survey first statistical cold molecular gas on CGM scales. We present Atacama Large Millimeter Array and Compact observations CO(4–3) continuum emission from 10 Ly α nebulae (ELANe) around ultraluminous type I quasi-stellar objects (QSOs) ∼ 2. detect in 100% our...

10.3847/1538-4357/accbbd article EN cc-by The Astrophysical Journal 2023-06-01

We present high spatial resolution (0.4", 2.2kpc) observations of the CO(6-5), CO(7-6) and [CI] lines dust continuum emission from interstellar medium in host galaxy quasar J0305$-$3150 at $z=6.6$. These, together with archival [CII] data comparable resolution, enable studies distribution kinematics between ISM different phases. When comparing radial profiles CO, continuum, we find that CO exhibit similar distributions, both which are less extended than [CII], indicating tracing same gas...

10.3847/1538-4357/ac61d7 article EN cc-by The Astrophysical Journal 2022-05-01

We present Karl G. Jansky Very Large Array (VLA) observations of the CO (2$-$1) line emission towards three far-infrared luminous quasars at $z\sim6$: SDSS J231038.88$+$185519.7 and J012958.51$-$003539.7 with $\sim0\farcs6$ resolution J205406.42$-$000514.8 $\sim2\farcs1$ resolution. All sources are detected in -- one source is marginally resolved, other two appear as point sources. Measurements allow us to calculate molecular gas mass even without a excitation model. The inferred masses...

10.3847/1538-4357/ab133d article EN The Astrophysical Journal 2019-05-08

Vision-based estimation of the motion a moving target is usually formulated as bearing-only problem where visual measurement modeled bearing vector. Although approach has been studied for decades, fundamental limitation this that it requires extra lateral observer to enhance target’s observability. Unfortunately, conflicts with desired in many tasks. It well-known that, once detected an image, bounding box surrounds can be obtained. Surprisingly, common especially its size information not...

10.1177/02783649241229172 article EN The International Journal of Robotics Research 2024-02-02

Abstract We present NOrthern Extended Millimeter Array observations of CO(8–7), (9–8), and (10–9) lines, as well the underlying continuum for two far-infrared luminous quasars: SDSS J2054-0005 at z = 6.0389 J0129-0035 5.7788. Both quasars were previously detected in CO (2–1) (6–5) transitions, making them candidates studying spectral line energy distribution (SLED) ∼ 6. Utilizing radiative transfer code CLOUDY, we fit SLED with heating mechanisms, including photodissociation region (PDR)...

10.3847/1538-4357/ad8de2 article EN cc-by The Astrophysical Journal 2024-12-01

Abstract The formation of the first supermassive black holes is expected to have occurred in some most pronounced matter and galaxy overdensities early universe. We conducted a submillimeter wavelength continuum survey 54 z ∼ 6 quasars using Submillimeter Common-User Bolometre Array-2 on James Clerk Maxwell Telescope study environments around quasars. identified 170 galaxies (SMGs) with above 3.5 σ detections 450 or 850 μ m maps. Their far-IR luminosities are (2.2–6.4) × 10 12 L ⊙ , their...

10.3847/1538-4357/acd7f3 article EN cc-by The Astrophysical Journal 2023-09-01

Background Ulcerative colitis (UC), a chronic inflammatory disease, often cause carcinogenesis, disability, and intestinal perforation. The JingFangFuZiLiZhong formula (JFFZLZ) shows good effect against UC in the clinic. Hence, we aim to investigate mechanisms between JFFZLZ via network pharmacology data mining vivo experiments.Methods We obtained active constituents related targets from public databases. overlapped genes were further analysed by enrichment analysis. hub used construct...

10.1080/07853890.2022.2095665 article EN cc-by Annals of Medicine 2022-11-16

Polarized holographic properties play an important role in the data storage of traditional organic recording materials. In this study, reduced graphene oxide (RGO) was introduced into a phenanthraquinone-doped polymethylmethacrylate (PQ/PMMA) photopolymer to effectively improve orthogonal polarization material. Importantly, lateral size RGO nanosheets has influence on polymerization MMA monomers. To some extent, larger diameter is more conducive promoting monomers and can induce PMMA...

10.3390/molecules29010214 article EN cc-by Molecules 2023-12-30
Coming Soon ...