A5076230887- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Atomic and Subatomic Physics Research
- Adaptive optics and wavefront sensing
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Methane Hydrates and Related Phenomena
- Pulsars and Gravitational Waves Research
- Inertial Sensor and Navigation
- Spectroscopy and Laser Applications
- Astrophysics and Cosmic Phenomena
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic confinement fusion research
- Spectroscopy and Chemometric Analyses
- Scientific Research and Discoveries
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Astro and Planetary Science
- GNSS positioning and interference
- Statistical and numerical algorithms
National Astronomical Observatories
2018-2024
Chinese Academy of Sciences
2018-2024
University of Chinese Academy of Sciences
2018-2023
National Space Science Center
2019
Abstract Precise tracking of the growth in galaxy size and evolution merger fractions with redshift is vital for understanding formation history submillimeter galaxies (SMGs). This study investigates this over a broad range (1 < z ≲ 6) using sample 222 SMGs median <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>2.6</mml:mn> <mml:msubsup> <mml:mrow> <mml:mn>1</mml:mn> </mml:mrow> <mml:mo>−</mml:mo>...
Abstract Recent JWST observations have revealed that dwarf galaxies start to cease star formation at redshifts z > 1, yet the quenching process remains unclear. In this study, we selected a large sample of 3,405 with stellar masses below 10 9.5 M ⊙ and ranging from 1.0 1.5 across all five CANDELS fields. By utilizing multi-wavelength imaging data both HST, examined growth patterns modes in during cosmic noon era. Based on their specific rates (sSFR), categorized into three subgroups:...
Ionization sources other than HII regions give rise to the right-hand branch in standard ([NII]) BPT diagram, populated by Seyfert 2s and LINERs. However, because majority of Seyfert/LINER hosts are star forming (SF), contaminate observed lines some extent, making it unclear if position along is merely due various degrees mixing between pure SF, or whether reflects intrinsic diversity ionizing sources. In this study, we empirically remove SF contributions ~100,000 Seyfert/LINERs from SDSS...
We present the observed Hα flux and derived star formation rates (SFRs) for a fall sample of low-surface-brightness galaxies (LSBGs). The is selected from sky region 40% ALFALFA H i Survey–SDSS DR7 photometric data, all images were obtained using 2.16 m telescope, operated by National Astronomy Observatories, Chinese Academy Sciences. A total 111 LSBGs was measured in 92 them. Though almost our are i-rich, their SFRs, extinction filter-transmission-corrected flux, less than 1 M☉ yr−1....
Abstract We present a narrow H α -band imaging survey of 357 low surface brightness galaxies (LSBGs) that are selected from the spring sky region 40% Arecibo Legacy Fast L Feed Array (ALFALFA) i Survey. All images obtained 2.16 m telescope, operated by Xinglong Observatory National Astronomical Observatories, Chinese Academy Sciences. provide fluxes and derive global star formation rates (SFRs) LSBGs after Galactic extinction, internal [N ii ] contamination correction. Compared to normal...
Abstract The measurements of morphological indicators galaxies are often influenced by a series observational effects. In this study, we utilize sample 832 TNG50 simulated with log( M * / ⊙ )> 9 at 0.5 < z 3 to investigate the differences in nonparametric ( C , A Gini 20 O and D ) derived from noise-free high-resolution images mock have same conditions as JWST/NIRCam. We quantify relationship between intrinsic observed values accordingly apply calibration 4733 stellar mass redshift...
Abstract A rare population of massive disk-dominated quiescent galaxies has recently drawn much attention, which intrudes the red sequence (RS) without destroying underlying stellar disks. In this study, we have carefully identified 48 RS, with M * > 10 ⊙ between redshift 0.5 and 1.0 in all five CANDELS fields. These are well fitted by a two-component bulge plus disk model, bulge-to-total ratio B / T < 0.4 both F814W F160W bands. The fitting results indicate that these generally...
Low surface brightness galaxies (LSBGs) are defined as that fainter than dark night sky and important for studying our universe. Particularly, edge-on useful the study of rotational velocity dynamical properties galaxies. Hence here we focus on searching LSBGs. In order to find these dim galaxies, a series effects caused by inclination, including profile, internal extinction, scale length, have been corrected. this work, present catalog 281 LSBG candidates, which selected from crossmatch...
Abstract We present the optical photometric and spectroscopic observations of nearby Type Ia supernova (SN) 2021hpr. The covered phase −14.37 to +63.68 days relative its maximum luminosity in B band. evolution multiband light/color curves SN 2021hpr is similar that normal supernovae (SNe Ia) with exception some phases, especially a plateau appeared V − R color curve before peak luminosity, which resembles 2017cbv. first spectrum we observed at t ∼ −14.4 shows higher velocity for Si ii λ 6355...
Abstract We present a study of low surface brightness galaxies (LSBGs) selected by fitting the images for all in α .40 SDSS DR7 sample with two kinds single-component models and two-component (disk+bulge): single exponential, sérsic, exponential+deVaucular (exp+deV), exponential+sérsic (exp+ser). Under criteria B band disk central <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>μ</mml:mi> </mml:mrow> <mml:mn>0</mml:mn>...
Abstract We have measured structural parameters and radial color profiles of 108 ultradiffuse galaxies (UDGs), carefully selected from six distant massive galaxy clusters in the Hubble Frontier Fields (HFF) a redshift range 0.308 to 0.545. Our best-fitting GALFIT models show that HFF UDGs median Sérsic index 1.09, which is close 0.86 for local Coma cluster. The axis-ratio value 0.68 0.74 UDGs, respectively. similarity between suggests they are same kind seen at different times, structures do...
We present a spectroscopic redshift catalog from the LAMOST Complete Spectroscopic Survey of Pointing Area (LaCoSSPAr) in Southern Galactic Cap (SGC), which is designed to observe all sources (Galactic and extragalactic) by using repeating observations with limiting magnitude two fields. The project mainly focusing on completeness ExtraGAlactic Surveys (LEGAS) SGC, deficiencies source selection methods, basic performance parameters telescope. In both fields, more than 95% galaxies have been...
The measurements of morphological indicators galaxies are often influenced by a series observational effects. In this study, we utilize sample over 800 TNG50 simulated with log($M_*$/M$_\odot$)$>9$ at $0.5<z<3$ to investigate the differences in non-parametric ($C$, $S$, $Gini$, $M_{\rm 20}$, $A_{\rm O}$, and $D_{\rm O}$) derived from noise-free high-resolution images mock have same conditions as {\it JWST}/NIRCam. We quantify relationship between intrinsic observed values accordingly apply...
Abstract We present optical luminosity functions (LFs) of galaxies in the 0.1 g , r i bands, calculated using data <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>∼</mml:mo> <mml:mn>40</mml:mn> <mml:mspace width="0.25em"/> <mml:msup> <mml:mrow> <mml:mi>deg</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:math> sky area LAMOST Complete Spectroscopic Survey Pointing Area (LaCoSSPAr) Southern Galactic Cap. Redshifts for brighter than = 18.1 were...
We have measured structural parameters and radial color profiles of 108 ultra-diffuse galaxies (UDGs), carefully selected from six distant massive galaxy clusters in the Hubble Frontier Fields (HFF) redshift range 0.308 to 0.545. Our best-fitting GALFIT models show that HFF UDGs a median S\'ersic index 1.09, which is close 0.86 for local Coma cluster. The axis-ratio value 0.68 0.74 UDGs, respectively. similarity between suggests they are same kind seen at different times structures do not...
We present a study of low surface brightness galaxies (LSBGs) selected by fitting the images for all in $\alpha$.40 SDSS DR7 sample with two kinds single-component models and two-component (disk+bulge): single exponential, s\'{e}rsic, exponential+deVaucular (exp+deV), exponential+s\'{e}rsic (exp+ser). Under criteria B band disk central $\mu_{\rm 0,disk}{\rm (B) \geqslant 22.5\ mag\ arcsec^{-2}}$ axis ratio $\rm b/a > 0.3$, we four none-edge-on LSBG samples from each which contain 1105, 1038,...
To study the disc central surface brightness ($\mu_0$) distribution in optical and near-infrared bands, we select 708 disc-dominated galaxies within a fixed distance of 57 Mpc from SDSS DR7 UKIDSS DR10. Then fit $\mu_0$ by using single double Gaussian profiles with an optimal bin size for final sample 538 $griz$ bands $YJHK$ bands. Among 8 find that $\mu_{0}$ can not be much better fitted profiles. However, all evidence being is positive. Especially $K$ band, profile than very strong,...