A5032255850- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Radio Astronomy Observations and Technology
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Nonlinear Waves and Solitons
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Advanced Vision and Imaging
- Material Science and Thermodynamics
- Astrophysics and Cosmic Phenomena
- History and Developments in Astronomy
- Recycling and Waste Management Techniques
- Impact of Light on Environment and Health
- Advanced Photonic Communication Systems
- Advanced Numerical Analysis Techniques
- Robotics and Sensor-Based Localization
University of Science and Technology of China
2022-2025
Pontificia Universidad Católica de Chile
2018-2022
National Astronomical Observatories
2017-2022
Chinese Academy of Sciences
2015-2021
Chinese Academy of Science South America Center for Astronomy
2018-2019
Institute of High Energy Physics
2015
University of Chinese Academy of Sciences
2015
Wuhu Hit Robot Technology Research Institute
2010
A particular population of galaxies have drawn much interest recently, which are as faint typical dwarf but the sizes large $L^*$ galaxies, so called "ultra-diffuse galaxie" (UDGs). The lack tidal features UDGs in dense environments suggests that their host halos perhaps massive Milky Way. On other hand, galaxy formation efficiency should be higher such masses. Here we use model catalog generated by populating two simulations: Millennium-II cosmological simulation and Phoenix simulations 9...
Abstract The large Integral Field Spectroscopy surveys have allowed the classification of ionizing sources emission lines on sub-kiloparsec scales. In this work, we define two non-parametric parameters, quiescence ( F q ) and its concentration C ), to quantify strength spatial distribution quenched areas, respectively, traced by LI(N)ER regions with low EW(H α ). With these measurements, classify MaNGA galaxies into inside-out outside-in quenching types according their locations versus plane...
In our previous work, we found that only two scenarios are capable of reproducing the observed integrated mass-metallicity relations for gas and stellar components local star-forming galaxies simultaneously. One scenario invokes a time-dependent metal outflow loading factor with stronger outflows at early times. The other uses IMF slope steeper this extend study to investigate radial profile metallicity in using spatially resolved spectroscopic data from SDSS-IV MaNGA survey. We find most...
Abstract We present a photometric study of the dwarf galaxy population in core region (≲ r vir /4) Fornax cluster based on deep u ′ g i photometry from Next Generation Cluster Survey . All imaging data were obtained with Dark Energy Camera mounted 4 m Blanco telescope at Cerro Tololo Interamerican Observatory. identify 258 candidates luminosities −17 ≲ M −8 mag, corresponding to typical stellar masses <?CDATA $9.5\gtrsim \mathrm{log}{{ \mathcal }}_{\star }/{M}_{\odot }\gtrsim 5.5$?> ,...
We report the discovery of 271 previously undetected dwarf galaxies in outer Fornax cluster regions at radii $r_{\rm vir}/4<\!r\!<r_{\rm vir}/2$ using data from Next Generation Survey (NGFS) with deep coadded $u'$, $g'$ and $i'$ images obtained Blanco/DECam Cerro Tololo Interamerican Observatory. From candidates we find 39 to be nucleated. Together our previous study central region, new dwarfs detected NGFS are 392, which 56 The total galaxy population other catalogs rises, therefore, a 643...
ABSTRACT Leveraging the data sets of galaxy triplets and large-scale filaments obtained from Sloan Digital Sky Survey, we scrutinize alignment three sides triangles formed by normal vectors triplet planes within observed filaments. Our statistical investigation reveals that longest median exhibit a robust with spines their host filaments, while shortest show no or only weak Additionally, tend to be perpendicular The signal diminishes rapidly increasing distance filament spine, is primarily...
ABSTRACT Clues to the formation and evolution of nuclear star clusters (NSCs) lie in their stellar populations. However, these structures are often very faint compared host galaxy, spectroscopic analysis NSCs is hampered by contamination light from rest system. With introduction wide-field integral field unit (IFU) spectrographs, new techniques have been developed model different components within galaxies, making it possible cleanly extract spectra study properties with minimal galaxy. This...
Abstract We investigate size variation with rest-frame wavelength for star-forming galaxies based on the second James Webb Space Telescope Advanced Deep Extragalactic Survey data release. Star-forming are typically smaller at longer wavelengths from UV to near-IR z < 3.5, especially more massive galaxies, indicating inside-out assembly in situ star formation if ignoring dust attenuation. The shows a strong dependence stellar mass and little or no redshift, specific rate, galaxy...
Abstract By analyzing data from DESI Legacy Imaging Survey of the dwarf galaxies in Arecibo Fast Alfa Survey, we have identified five ultradiffuse (UDGs) featuring central pseudobulges. These UDGs display blue pseudobulges with Sérsic indices n < 2.5 and effective radii spanning 300–700 pc, along bluer thin stellar disks exhibiting low surface brightness expansive that align UDG definition. The rotation velocities these UDGs, determined using H i line widths optical inclinations, exceed...
Abstract We investigate the baryonic Tully-Fisher relation in low surface brightness galaxies selected from Arecibo Legacy Fast ALFA survey. find that $\rm HI$-bearing still follow of typical late-type galaxies, with a slope approximately 4 mass versus rotational velocity diagram on logarithmic scale, i.e., $M_{\rm {b}}\propto v_{\rm {rot}}^4$. Our findings suggest matter distributions may resemble general and hint not originate dark halos densities or stronger/weaker feedback processes, but...
Abstract Leveraging the semi-analytic method, we compute halo spins for a substantial sample of HI-bearing galaxies observed in Arecibo Legacy Fast Alfa Survey. Our statistical analysis reveals correlation between spin and environment, although trend is subtle. On average, exhibit decreasing tendency denser environments. This observation contrasts with previous results from $N$-body simulations Lambda cold dark matter framework. The discrepancy may be attributed to environmental gas...
Abstract We investigated the alignment between angular momenta of galaxy groups and spines their associated cosmic filaments. Our results demonstrate a significant tendency for these two orientations to be perpendicular, indicating that rotation group does not originate from spin Instead, it is driven by orbital momentum contributed member galaxies as they accrete along direction filament spines. Moreover, strength this perpendicular signal varies with richness groups, most pronounced...
Abstract We investigate the alignment of nonred early-type galaxies (ETGs) with blue or green colors within large-scale filaments and compare this pattern that red ETGs. Our analysis reveals a significant major axes ETGs orientations their host cosmic filaments, consistent prior research. In contrast, show no signal. This divergence in behavior between plausibly suggests distinct evolutionary pathways for
Baryonic cycling is reflected in the spatial distribution of metallicity within galaxies; however, gas-phase and its connection with other properties dwarf galaxies are largely unexplored. We present first systematic study radial gradients metallicities for a sample 55 normal nearby star-forming (stellar mass M_⋆ ranging from 10^7 to 10^9.5 M_⊙) based on MUSE wide-field spectroscopic observations. find that gradient has significant negative correlation (Spearman's rank coefficient r ≃ -0.56)...
We present the analysis of 61 nucleated dwarf galaxies in central regions ($
Abstract A clear link between a dwarf–dwarf merger event and enhanced star formation (SF) in the recent past was recently identified gas-dominated remnant VCC 848, offering by far clearest view of gas-rich late-stage merger. We present joint analysis JVLA H i emission line mapping, optical imaging, numerical simulations 848 order to examine effect on stellar gaseous distributions. has less than 30% its gas concentrated within central high-surface-brightness star-forming region, while...
With the published data of apparent axis ratios for 1109 ultra-diffuse galaxies (UDGs) located in 17 low-redshift (z~ 0.020 - 0.063) galaxy clusters and 84 UDGs 2 intermediate-redshift 0.308 0.348) clusters, we take advantage a Markov Chain Monte Carlo approach assume ubiquitous triaxial model to investigate intrinsic morphologies UDGs. In contrast conclusion Burkert (2017), i.e., underlying shapes are purely prolate ($C=B<A$), find that favor oblate-triaxial models ($C<B\lesssim A$) over...
We investigate the on-average properties for 28 star-forming ultra-diffuse galaxies (UDGs) located in low-density environments, by stacking their spectra from Sloan Digital Sky Survey. These relatively-isolated UDGs, with stellar masses of $\log_{10}(M_*/M_{\odot})\sim 8.57\pm0.29$, have total-stellar-metallicity [M/H]$\sim -0.82\pm0.14$, iron-metallicity [Fe/H]$\sim -1.00\pm0.16$, age $t_*\sim5.2\pm0.5$ Gyr, $\alpha$-enhancement [$\alpha$/Fe]$\sim 0.24\pm0.10$, and oxygen abundance...
Abstract We report evidence of a hidden black hole (BH) in low-mass galaxy, MaNGA 9885-9102, and provide new method to identify active BHs galaxies. This galaxy is originally selected from the survey with distinctive bipolar H α blobs at minor axis. The feature can be associated galactic nuclei (AGN) activity, while two are classified as ii regions on BPT diagram, making origins confusing. Swift UV continuum shows that do not have counterparts, suggesting source ionization out blobs....
Abstract We analyze the properties of a rare population, strongly bulge-dominated early-type galaxies (sBDEs) with significant H i gas, using databases from FAST All Sky survey (FASHI) and Arecibo Legacy Fast ALFA (ALFALFA) survey. select sBDEs Sloan Digital Survey crossmatch FASHI-ALFALFA combined sample, resulting in 104 -rich sBDEs. These tend to have extremely high reservoirs, which is previous studies such as ATLAS 3D . A total 70% selected are classified quiescent galaxies, even though...
We study the radial acceleration relation (RAR) for early-type galaxies (ETGs) in SDSS MaNGA MPL5 dataset. The complete ETG sample show a slightly offset RAR from reported by McGaugh et al. (2016) at low-acceleration end; we find that deviation is due to fact slow rotators systematically higher than McGaugh's RAR, while fast consistent RAR. There 1\sigma significant difference between relations of and rotators, suggesting correlates with galactic spins, may have different mass distribution...
Abstract Gas accretion is an important process in the evolution of galaxies, but it has limited direct observational evidences. In this paper, we report detection a possible ongoing gas event blue compact dwarf (BCD) galaxy, MaNGA 8313-1901, observed by Mapping Nearby Galaxies and Apache Point Observatory (MaNGA) program. This galaxy distinct off-centered clump to northeast (the NE clump) that shows low metallicity enhanced star formation. The kinematics also seems be detached from host BCD...
Unlike the random radial orientation distribution of field elliptical galaxies, galaxies in a cluster are expected to point preferentially towards centre cluster, as result cluster's tidal force on its member galaxies. In this work, an analytic model is formulated simulate effect. The deformation time-scale galaxy usually much shorter than change force; dynamical process interaction within can thus be ignored. equilibrium shape then assumed surface equipotential that sum self-gravitational...
The orientations of the red galaxies in a filament are aligned with orientation filament. We thus develop location-alignment-method (LAM) detecting filaments around clusters galaxies, which uses both alignments and their distributions two-dimensional images. For first time, used as probes filaments. apply LAM to environment Coma cluster, find four (two located sheets) two selected regions, compared detected method \cite{Falco14}. that can effectively detect even $3\sigma$ confidence level,...