A5101874412- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Cultural Heritage Materials Analysis
- Radio Astronomy Observations and Technology
- Physics of Superconductivity and Magnetism
- Corrosion Behavior and Inhibition
- Solar and Space Plasma Dynamics
- Plant Molecular Biology Research
- Rare-earth and actinide compounds
- Plant Genetic and Mutation Studies
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Space Technology and Applications
- Medical and Biological Ozone Research
- Adaptive optics and wavefront sensing
- Laser-induced spectroscopy and plasma
- Superconductivity in MgB2 and Alloys
- Geophysics and Gravity Measurements
- Biochemical and Structural Characterization
- Plant Parasitism and Resistance
Northwestern Polytechnical University
2023-2025
Rajamangala University of Technology Isan
2024
Rajamangala University of Technology Tawan-ok
2024
Las Campanas Observatory
2018-2023
Carnegie Institution for Science
2019-2023
Carnegie Observatories
2019-2023
Shaanxi Normal University
2023
Chinese Academy of Sciences
2013-2022
University of Science and Technology of China
2011-2022
University of Guelph
2022
The Early Release Observations (EROs) of JWST beautifully demonstrate the promise in characterizing universe at cosmic dawn. We analyze ERO spectra three $z \sim 8$ galaxies to determine their metallicities, gas temperatures and ionization. These offer first opportunity understand physical properties epoch-of-reionization through detailed rest-optical emission line spectroscopy. show that these objects have metal abundances $12+\log[O/H] \approx 6.9 - 8.2$, based on both $T_e$ method a...
Excessive oxidative stress, dysregulated immune homeostasis, and disruption of the intestinal epithelial barrier are crucial features inflammatory bowel disease (IBD). Traditional treatments focusing solely on inflammation resolution remain unsatisfactory. Herein, a yeast-inspired orally administered nanocomposite was developed. First, MD@MPDA core fabricated by integrating manganese dioxide (MnO2) nanozymes onto diallyl trisulfide (H2S prodrug)-loaded mesoporous polydopamine nanoparticles...
While most of the inter-galactic medium (IGM) today is permeated by ionized hydrogen, it was largely filled with neutral hydrogen for first 700 million years after Big Bang. The process that IGM (cosmic reionization) expected to be spatially inhomogeneous, fainter galaxies playing a significant role. However, we still have only few direct constraints on reionization process. Here report spectroscopic confirmation two and very likely third galaxy in group (hereafter EGS77) at redshift z =...
Abstract We present a new measurement of the Ly α luminosity function (LF) at redshift z = 6.9, finding moderate evolution from 5.7 that is consistent with fully or largely ionized ∼ 7 intergalactic medium. Our result based on four fields LAGER (Lyman Alpha Galaxies in Epoch Reionization) project. survey volume 6.1 × 10 6 Mpc 3 double next largest survey. combine two (WIDE12 and GAMA15A) previously reported (COSMOS CDFS). In fields, we identify N 95 6.9 emitter (LAEs) candidates,...
We studied Lyman-$\alpha$ (Ly$\alpha$) escape in a statistical sample of 43 Green Peas with HST/COS Ly$\alpha$ spectra. are nearby star-forming galaxies strong [OIII]$\lambda$5007 emission lines. Our is four times larger than the previous and covers much more complete range Pea properties. found that about 2/3 line emitters rest-frame equivalent width $>20$ \AA. The profiles diverse. fraction, defined as ratio observed flux to intrinsic flux, shows anti-correlations few kinematic features --...
Hard X-ray emission in radio-quiet active galactic nuclei (AGNs) is believed to be produced via inverse Compton scattering by hot and compact coronae near the supermassive black hole. However, origin physical properties of coronae, including geometry, kinematics, dynamics, remain poorly known. In this work, taking [O iv] 25.89 μm line as an isotropic indicator AGNs' intrinsic luminosity, we compare corona between Seyfert 1 Compton-thin 2 galaxies, which are viewed at different inclinations...
We analyze archival Ly$\alpha$ spectra of 12 "Green Pea" galaxies observed with the Hubble Space Telescope, model their profiles radiative transfer models, and explore dependence escape fraction on various properties. Green Pea are nearby compact starburst [OIII]$\lambda$5007 equivalent widths hundreds \AA. All in our sample show lines emission, a width distribution similar to high redshift emitters. Combining optical UV galaxies, we estimate fractions find correlations between kinematic...
We present the largest-ever sample of 79 Ly$α$ emitters (LAEs) at $z\sim$ 7.0 selected in COSMOS and CDFS fields LAGER project (the Lyman Alpha Galaxies Epoch Reionization). Our newly amassed ultradeep narrowband exposure deeper/wider broadband images have more than doubled number LAEs COSMOS, we 30 second field CDFS. detect two large-scale LAE-overdense regions that are likely protoclusters highest redshift to date. perform injection recovery simulations derive incompleteness. show...
Galaxies at high redshifts provide a valuable tool to study cosmic dawn, and therefore it is crucial reliably identify these galaxies. Here, we present an unambiguous first simultaneous detection of both the Lyman-alpha emission Lyman break from z = 7.512+/- 0.004 galaxy, observed in Faint Infrared Grism Survey (FIGS). These spectra, taken with G102 grism on Hubble Space Telescope (HST), show significant line (6 sigma) multiple observational position angles (PA), total integrated Ly{\alpha}...
Bosonic fields (within suitable mass range) may be collectively generated by rotating black holes through the hole superradiance process. The resulting is surrounded a ``cloud" of particles whose wave function populates superradiant energy level hole. For comparable ratio binary systems, it has been suggested that these clouds often deplete at large separations because mixing effects. As result, not dynamically relevant for and neutron star binaries enter LIGO-Virgo-KAGRA LISA detection...
Abstract We explore the presence of active galactic nuclei (AGNs)/black holes in Green Pea galaxies (GPs), motivated by high-ionization emission lines such as He ii and [Ne iii ] their optical spectra. In order to identify AGN candidates, we used mid-infrared (MIR) photometric observations from all-sky Wide-field Infrared Survey Explorer (WISE) mission for a sample 1004 GPs. Considering only >5 σ detections with no contamination neighboring sources AllWISE, select 31 GPs out 134 candidate...
In this work, we discuss a scenario of micro-Tidal Disruption Event (TDE) associated with high-speed white dwarfs and stellar-mass black holes. It happens at galactic centers, where dwarf orbiting around the massive hole scatters in its early extreme mass-ratio inspiral stage. We estimate formation rate, perform series hydro simulations to investigate amount accreted unbound mass as function impact radius speed, main EM signatures: an X-ray flare (micro-TDE) followed by relatively faint...
Inflammatory bowel disease (IBD) is a complex chronic intestinal disorder in which excessive oxidative stress, dysregulated immune response, and microbiota dysbiosis contribute to recurrent episodes of inflammation the colonic mucosa. Current clinical treatments focusing solely on resolution often exhibit limited efficacy due inability fundamentally improve pathological microenvironment. Herein, probiotic membrane-modified drug delivery nanocomposite, namely, MPDA@Cur@EM, developed for...
Introduction Traditional Chinese Medicine (TCM) classifies botanical drugs based on their thermal properties (an emic classification system), categorizing them as “cold” (e.g., “clearing heat” for anti-inflammatory effects) or “hot” “warming the middle” metabolic enhancement). However, specific roles of these in restoring gut microbiota dysbiosis remain unclear. This study aimed to explore whether TCM-classified cold and hot differentially restore host physiology antibiotic-treated mice....
Green Peas are nearby analogs of high-redshift Ly$\alpha$-emitting galaxies. To probe their Ly$\alpha$ escape, we study the spatial profiles and UV continuum emission 24 Pea galaxies using Cosmic Origins Spectrograph (COS) on Hubble Space Telescope (HST). We extract from 2D COS spectra, both spectra NUV images. The shows more extended than in most Peas. deconvolved Full Width Half Maximum (FWHM) profile is about 2 to 4 times that cases. Since high-z LAEs, it suggests LAEs likely have larger...
Abstract Searching for extreme emission line galaxies allows us to find low-mass metal-poor that are good analogs of high redshift Ly α emitting galaxies. These also potential Lyman-continuum leakers. Finding them at very low redshifts ( <?CDATA $z\lesssim 0.05$?> ) be sensitive even lower stellar masses and metallicities. We report on a sample (blueberry galaxies). selected from SDSS broadband images the basis their colors studied properties with MMT spectroscopy. From entire DR12...
The gas metallicity of galaxies is often estimated using strong emission lines such as the optical [OIII] and [OII]. most common measure "R23", defined ([OII]$\lambda$$\lambda$3726, 3729 + [OIII]$\lambda$$\lambda$4959,5007)/H$\beta$. Most calibrations for these strong-line indicators are continuum selected galaxies. We report a new empirical calibration R23 extreme emission-line large sample about 800 star-forming green pea with reliable T$_e$-based gas-phase measurements. This assembled...
We present our measurements of the H$\alpha$, [OIII], and [OII] luminosity functions as part Lyman Alpha Galaxies at Epoch Reionization (LAGER) survey using samples 1577 $z = 0.47$ H$\alpha$-, 3933 0.93$ [OIII]-, 5367 1.59$ [OII]-selected emission line galaxies in a single 3 deg$^2$ CTIO/Blanco DECam pointing COSMOS field. Our observations reach 5$\sigma$ depths $8.2\times10^{-18}$ erg s$^{-1}$ cm$^{-2}$ comoving volumes $(1-7)\times10^{5}$ Mpc$^3$ making one deepest narrowband surveys....
Abstract Green Pea and Blueberry galaxies are well known for their compact size, low mass, strong emission lines, analogs to high- z Ly α -emitting galaxies. In this study, 1547 [O iii ] λ 5007 emission-line with 1694 spectra selected from LAMOST DR9 at the redshift range 0.0 0.59. According distribution, these samples can be separated into three groups: Blueberries, Peas, Purple Grapes. Optical [Mg ii 2800 line feature, BPT diagram, multiwavelength spectral energy distribution (SED)...
We have studied ultraviolet images of 40 Green Pea galaxies and 15 local Lyman Break Galaxy Analogs to understand the relation between Ly$\alpha$ photon escape central UV photometric properties. measured star formation intensity (SFI, rate per unit area) from 250 pc region ($S_{\rm 250pc}$) using COS/NUV \textit{Hubble Space Telescope}. The $S_{\rm 250pc}$ our sample Peas ranges 2.3--46 $M_{\odot} \ \rm{year}^{-1} \rm{kpc^{-2}}$, with a geometric mean $15 M_{\odot} \rm{kpc^{-2}}$ standard...
Narrowband imaging is a highly successful approach for finding large numbers of high redshift Lya emitting galaxies (LAEs) up to z~6.6. However, at z>~7 there are as yet only 3 narrowband selected LAEs with spectroscopic confirmations (two z~6.9-7.0, one z~7.3), which hinders extensive studies on cosmic reionization and galaxy evolution this key epoch. We have 23 candidate z~6.9 in COSMOS field the area survey LAGER (Lyman-Alpha Galaxies End Reionization). In work we present followup...
We explore the relation between star formation rate surface density ($\Sigma$SFR) and interstellar gas pressure for nearby compact starburst galaxies. The sample consists of 17 green peas 19 Lyman break analogs. Green are analogs Ly$\alpha$ emitters at high redshift galaxies redshift. measure sizes using Hubble Space Telescope Cosmic Origins Spectrograph (COS) NUV images with a spatial resolution $\sim$ 0.05$^{''}$. estimate thermal in HII regions by $P = N_{total}Tk{_B} \simeq...