A5100710969- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Pulsars and Gravitational Waves Research
- Quantum Chromodynamics and Particle Interactions
- Gamma-ray bursts and supernovae
- Topological Materials and Phenomena
- Photonic Crystals and Applications
- Geophysics and Gravity Measurements
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear physics research studies
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Spectroscopy and Laser Applications
- Metamaterials and Metasurfaces Applications
- Photonic and Optical Devices
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Advanced Vision and Imaging
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Terahertz technology and applications
- Analytical Chemistry and Sensors
- Advanced Polymer Synthesis and Characterization
Tianjin University
2021-2024
Tsinghua University
2011-2024
Southeast University
2021-2023
Tsinghua Sichuan Energy Internet Research Institute
2023
Shanghai University
2018
Anhui University
2015
State Key Joint Laboratory of Environment Simulation and Pollution Control
2011
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is acquiring integral-field spectroscopy for the largest sample of galaxies to date. By 2020, MaNGA Survey --- one three core programs in fourth-generation Sloan Digital Sky (SDSS-IV) will have observed a statistically representative 10$^4$ local Universe ($z\lesssim0.15$). In addition robust data-reduction pipeline (DRP), has developed data-analysis (DAP) that provides higher-level data products. To accompany first public release...
We study the spatially resolved star formation history and molecular gas distribution of 58 nearby galaxies, using integral field spectroscopy from CALIFA survey CO $J=1\rightarrow 0$ intensity mapping CARMA EDGE survey. use 4000 \AA\ break (D$_n$4000), equivalent width H$\delta$ absorption line (EW H$\delta_A$), H$\alpha$ emission H$\alpha$) to measure recent (SFH) these galaxies. radial profiles three SFH indicators mass surface density, which we level centrally enhanced concentration....
We analyze the stellar initial mass functions (IMF) of a large sample early type galaxies (ETGs) provided by MaNGA. The number IFU spectra individual provide high signal-to-noise composite that are essential for constraining IMF and to investigate possible radial gradients within galaxies. ETGs also make it study how shape depends on various properties adopt novel approach variations in ETGs, use Bayesian inferences based full spectrum fitting. method provides statistically rigorous way...
Abstract This is the second paper in a series that utilize integral field spectroscopy from MaNGA, NUV imaging Swift/UVOT and NIR 2MASS to investigate dust attenuation properties on kpc scales nearby galaxies. We apply method developed our previous work updated SWiM_v4.2 catalog, measure optical curve three bands for 2487 spaxels selected 91 galaxies with S/N>20 A V >0.25. classify all into two subsets: star-forming (SF) regions non-SF regions. explore correlations of opacity (A )...
Topological photonics has made great progress from physical concept verification to new technical applications, and valley topological photonic crystal (TPCs) are one of the most important candidates for future applications in functional devices because large bandwidth lossless optical transport. However, due limitations design method structure arrangement, multichannel beam splitter (BS) not yet been much explored. Here, we reveal different robustness four types domain walls TPCs....
A relationship between dust-reprocessed light from recent star formation and the amount of star-forming gas in a galaxy produces correlation WISE 12 $μ$m emission CO line emission. Here we explore this on kiloparsec scales with CO(1-0) maps EDGE-CALIFA matched resolution to images. We find strong CO-12 correlations within each show that scatter global is largely driven by differences galaxy. The stronger than rate H$_2$ surface densities ($Σ(\mathrm{H_2})$). multi-variable regression predict...
Abstract We investigate the dust attenuation in both stellar populations and ionized gas kiloparsec-scale regions nearby galaxies using integral field spectroscopy data from MaNGA MPL-9. identify star-forming (H ii ) diffuse (DIG) cubes. From stacked spectrum of each region, we measure attenuation, <?CDATA $E{\left(B-V\right)}_{\mathrm{star}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>E</mml:mi> <mml:msub> <mml:mrow> <mml:mfenced close=")"...
Abstract Wolf–Rayet (WR) galaxies are a rare galaxy type that hosts living high-mass stars during the WR phase (i.e., stars) and can thus provide constraints on stellar initial mass function, massive star formation, evolution models, etc. Spatially resolved spectroscopy should in principle identify more efficiently than single-fiber surveys of galactic centers, as be preferentially found disks. Using integral field unit data from ongoing SDSS-IV MaNGA survey, we have performed thorough...
Originating from the study of topological photonic crystals (TPCs), analogues quantum spin Hall effect have been used as a potential way to control propagation electromagnetic waves. Due robustness TPCs, edge states along interface between trivial and areas are topologically protected not reflected structural defects disorders. Here, on basis time-spatial reversal symmetry defect theory, we demonstrate broadening state bandwidth in TPCs made regular metallic cross structures by...
The meaningful correlations between the zero-sound modes and stiffness of nuclear equation state (EOS) are uncovered in matter with relativistic mean-field theory. It is demonstrated that high-density merely exist models stiff EOS. While EOS can be softened by including $\ensuremath{\omega}$-meson self-interactions (the ${\ensuremath{\omega}}^{4}$ term), weakened coupling reignites zero sound at high density. These results suggest used to probe supra-normal densities. implications effects...
Abstract We study the size–mass relation (SMR) and recent star formation history (SFH) of post-starburst (PSB) galaxies in local Universe using spatially resolved spectroscopy from final data release MaNGA. Our sample includes 489 PSB galaxies: 94 cPSB with central regions, 85 rPSB ringlike 310 iPSB irregular regions. When compared to control similar rate, redshift, mass, a SMR is found for all types samples except galaxies, which have smaller sizes at intermediate masses ( <?CDATA...
Abstract We investigate the radial dependence of scaling relations dust attenuation in nearby galaxies using integral field spectroscopy data from MaNGA. identify ionized gas regions kiloparsec size MaNGA galaxies, and for each region we estimate both stellar E ( B − V ) star . then quantify correlations 15 regional/global properties with , feature importance obtained Random Forest regression technique Spearman correlation coefficients. The mass, metallicity, nebular velocity dispersion...
As hosts of living high-mass stars, Wolf-Rayet (WR) regions or WR galaxies are ideal objects for constraining the end stellar initial mass function (IMF). We construct a large sample 910 galaxies/regions that cover wide range metallicity (from Z~0.001 up to Z~0.03), by combining three catalogs previously selected from SDSS and SDSS-IV/MaNGA surveys. measure equivalent widths blue bump at ~4650 A each spectrum. They compared with predictions evolutionary models Starburst99 BPASS, different...
Abstract We develop a method to estimate the dust attenuation curve of galaxies from full optical spectral fitting. Motivated by previous studies, we separate small-scale features large-scale shape, performing moving average both observed spectrum and simple stellar population (SSP) model spectra. The intrinsic dust-free is then derived fitting ratio small- ( S / L ) components with ratios SSP models. selective determined comparing spectrum. One important advantage this that estimated...
We study the neutron star core-crust transition density $\rho_t$ with inclusion of vacuum polarization in dielectric function nonlinear relativistic Hartree approach (RHAn). It is found that strong correlation between $\rho_{t}$ and scalar meson mass $m_{\sigma}$ strikingly overwhelms uncertainty nuclear equation state RHAn models, contrast to usual awareness predominantly sensitive isovector potential symmetry energy. The accurate extraction through future gravitational wave measurements...
Abstract We develop a novel approach to measure the dust attenuation properties of galaxies, including opacity, shape curve, and strength 2175 Å absorption feature. From an observed spectrum, method uses model-independent derive relative curve with absolute amplitude calibrated using NIR photometry. The dust-corrected spectrum is fitted stellar population models dust-free model which compared SED/spectrum from NUV determine properties. apply this investigate on kiloparsec scales sample 134...
Abstract The stellar mass-to-light ratio ( M * / L ) of galaxies in a given wave band shows tight correlations with optical colors, which have been widely applied as cheap estimators galaxy masses. These are usually calibrated using either broadband spectral energy distributions (SEDs) or spectroscopy at galactic centers. However, it is unclear whether the same provide unbiased for different regions within galaxy. In this work we employ integral field from Mapping Nearby Galaxies Apache...
As one of the three major experiments fourth-generation Sloan Digital Sky Survey (SDSS-IV), Mapping Nearby Galaxies at Apatch Point Observatory (MaNGA) survey has obtained high-quality integral field spectroscopy (IFS) with a resolution 1–2 kpc for ∼ 10 4 galaxies in local universe during its six-year operation from July 2014 through August 2020. It is crucial to reliably measure physical properties different components each spectrum before can use data any scientific study. In past years we...
Abstract Using integral field spectroscopy (IFS) from MaNGA, we study the resolved microstructures in a shocked region Criss-cross Nebula (CCN), with an unprecedentedly high resolution of ≲1000 au. We measure surface brightness maps for 34 emission lines, which can be broadly divided into three categories: (1) [O iii ] λ 5007-like group including seven high-ionization lines and two ii auroral that uniformly present remarkable lane structure, (2) H α 6563-like group, 23 low-ionization or...
Valley topological photonic crystals (TPCs), which are robust against local disorders and structural defects, have attracted great research interest, from theoretical verification to technical applications. However, previous works mostly focused on the robustness of topologically protected edge states little attention was paid importance bandgaps (PBGs), hinders implementation various multifrequency functional devices. Here, by systematically studying relationship between degree symmetry...
Time-varying effects have unveiled new possibilities for manipulating electromagnetic waves through the temporal dimension. In this study, we experimentally explore these in nonlinear optical process of terahertz (THz) generation using optically pumped indium tin oxide (ITO) films. The ultrafast carrier dynamics ITO film endow second-order susceptibility (\c{hi}(2)) with sub-picosecond evolution, establishing a boundary generated THz waves. We observe significant amplitude and frequency...
We investigate the radial dependence of scaling relations dust attenuation in nearby galaxies using integral field spectroscopy (IFS) data from MaNGA. identify ionized gas regions kpc sizes MaNGA galaxies, and for each region we estimate both stellar $E(B-V)_{\rm star}$ gas}$. then quantify correlations 15 regional/global properties with gas}$ star}$, feature importance obtained Random Forest regression technique Spearman correlation coefficients. The mass, metallicity nebular velocity...