A5033692708- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Biblical Studies and Interpretation
- CCD and CMOS Imaging Sensors
- Advanced Image Processing Techniques
- History and Developments in Astronomy
- Historical and Architectural Studies
- Astrophysics and Star Formation Studies
- Neutrino Physics Research
- Big Data Technologies and Applications
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Impact of Light on Environment and Health
- Historical Astronomy and Related Studies
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
Yunnan University
2024
University of Pennsylvania
2016-2019
We present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg$^2$ $griz$ imaging data the first year Dark Energy Survey (DES Y1). combine three two-point functions: (i) cosmic shear correlation function 26 million source galaxies in four redshift bins, (ii) angular autocorrelation 650,000 luminous red five (iii) galaxy-shear cross-correlation positions shears. To demonstrate robustness these results, we use independent pairs...
We present two galaxy shape catalogues from the Dark Energy Survey Year 1 data set, covering 1500 square degrees with a median redshift of $0.59$. The cover main fields: Stripe 82, and an area overlapping South Pole Telescope survey region. describe our analysis process in particular measurement using independent shear pipelines, METACALIBRATION IM3SHAPE. catalogue uses Gaussian model innovative internal calibration scheme, was applied to $riz$-bands, yielding 34.8M objects. IM3SHAPE...
We present galaxy-galaxy lensing measurements from 1321 sq. deg. of the Dark Energy Survey (DES) Year 1 (Y1) data. The lens sample consists a selection 660,000 red galaxies with high-precision photometric redshifts, known as redMaGiC, split into five tomographic bins in redshift range 0.15<z<0.9. use two different source samples, obtained Metacalibration (26 million galaxies) and im3shape (18 shear estimation codes, which are four 0.2<z<1.3. perform extensive testing potential systematic...
Abstract Gamma-ray bursts (GRBs) are the most luminous transients in Universe. The interaction of relativistic jet with circumburst medium produces an afterglow and generates multiwavelength emission. In this work, we present simultaneous multiband photometry GRB 240825A Multi-channel Photometric Survey Telescope (Mephisto) analyze its temporal spectral properties. measurement began 128 s after trigger continued until fourth day, when essentially diminished measured brightness was close to...
We present galaxy-galaxy lensing results from 139 square degrees of Dark Energy Survey (DES) Science Verification (SV) data. Our lens sample consists red galaxies, known as redMaGiC, which are specifically selected to have a low photometric redshift error and outlier rate. The measurement has total signal-to-noise 29 over scales $0.09 < R 15$ Mpc/$h$, including all lenses wide range $0.2 z 0.8$. Dividing the into three bins for this constant moving number density sample, we find no...
Abstract SN 2023ixf, recently reported in the nearby galaxy M101 at a distance of 6.85 Mpc, was one closest and brightest core-collapse supernovae last decade. In this work, we present multiwavelength photometric observation 2023ixf with Multi-channel Photometric Survey Telescope (Mephisto) uvgr bands twin 50 cm telescopes griz bands. We find that bolometric luminosity reached maximum value 3 × 10 43 erg s −1 3.9 days after explosion fully settled onto radioactive tail ∼90 days. The...
Abstract Splashback refers to the process of matter that is accreting onto a dark halo reaching its first orbital apocenter and turning around in orbit. The clustercentric radius at which this occurs, r sp , defines boundary connected dynamics cluster. A rapid decline profile expected near . We measure galaxy number density weak lensing mass profiles red M PP er clusters first-year Dark Energy Survey (DES) data. For cluster sample with mean 200m ≈2.5 × 10 14 ⊙ we find strong evidence...
What are the mass and galaxy profiles of cosmic voids? In this paper we use two methods to extract voids in Dark Energy Survey (DES) Year 1 redMaGiC sample address question. We either 2D slices projection, or 3D distribution galaxies based on photometric redshifts identify voids. For profile, measure tangential shear background infer excess surface density. The signal-to-noise ratio for our lensing measurement ranges between 10.7 14.0 void samples. their density by fitting models N-body...
Abstract We present early-phase good-cadence (hour-to-day) simultaneous multiband ( ugi and vrz bands) imaging of the nearby supernova SN 2024ggi, which exploded in galaxy NGC 3621. A quick follow-up was conducted within less than a day after explosion continued for ∼23 days. The uvg band light curves display rapid rise (∼1.4 mag −1 ) to maximum ∼4 days absolute magnitude M g ∼ −17.75 mag. postpeak decay rate redder bands is ∼0.01 . Different colors (e.g., u − v r 2024ggi are slightly...
The OpenUniverse2024 simulation suite is a cross-collaboration effort to produce matched simulated imaging for multiple surveys as they would observe common sky. Both the data and associated tools used it are intended uniquely enable wide range of studies maximize science potential next generation cosmological surveys. We have produced approximately 70 deg$^2$ Vera C. Rubin Observatory Legacy Survey Space Time (LSST) Wide-Fast-Deep survey Nancy Grace Roman Telescope High-Latitude Wide-Area...
We present the optical light curves of tidal disruption event (TDE) AT 2023clx in declining phase, observed with Mephisto. Combining our curve ASAS-SN and ATLAS data rising fitting composite multi-band MOSFiT, we estimate black hole mass is between $10^{5.67}$--$10^{5.82}~M_{\odot}$. This may be caused by either a full $0.1~M_{\odot}$ star, or partial $0.99~M_{\odot}$ depending on adopted for phase. Based those fit results non-detection soft X-ray photons first 90 days, propose that...