A5082667118- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Calibration and Measurement Techniques
- Infrared Target Detection Methodologies
- CCD and CMOS Imaging Sensors
- Pancreatic function and diabetes
- Nematode management and characterization studies
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Histone Deacetylase Inhibitors Research
- Adenosine and Purinergic Signaling
- Advanced Semiconductor Detectors and Materials
- Scientific Measurement and Uncertainty Evaluation
- Plant Molecular Biology Research
- Historical Geography and Cartography
- Plant Genetic and Mutation Studies
- Mycorrhizal Fungi and Plant Interactions
- Obsessive-Compulsive Spectrum Disorders
Shihezi University
2025
Xinjiang Production and Construction Corps
2025
National Astronomical Observatories
2019-2024
Chinese Academy of Sciences
2019-2024
Shenyang Agricultural University
2024
National University of Defense Technology
2024
University of British Columbia
2020-2022
Shanghai East Hospital
2018-2020
Peking University
2017-2019
Australian National University
2017-2019
We present the first data release (DR1) of SkyMapper Southern Survey, a hemispheric survey carried out with Telescope at Siding Spring Observatory in Australia. Here, we strategy, processing, catalogue construction and database schema. The DR1 dataset includes over 66,000 images from Shallow Survey component, covering an area 17,200 deg$^2$ all six passbands $uvgriz$, while full covered by any passband exceeds 20,000 deg$^2$. catalogues contain 285 million unique astrophysical objects,...
Deep far-infrared photometric surveys studying galaxy evolution and the nature of cosmic infrared background are a key strength Herschel mission. We describe scientific motivation for PACS Evolutionary Probe (PEP) guaranteed time program its role in complement surveys, field selection which includes popular multiwavelength fields such as GOODS, COSMOS, Lockman Hole, ECDFS, EGS. provide an account observing strategies data reduction methods used. An overview first science results illustrates...
(Abridged) We study relationships between the SFR and nuclear properties of X-ray selected AGNs out to z=2.5, using far-IR data in three extragalactic deep fields as part PACS Evolutionary Probe (PEP) program. Guided by studies intrinsic infra-red AGN SEDs, we show that majority FIR emission is produced cold dust heated star-formation. uncover characteristic redshift-dependent trends mean luminosity (L_fir) accretion (L_agn) AGNs. At low luminosities, are uncorrelated at all redshifts,...
Abstract We present the second data release (DR2) of SkyMapper Southern Survey, a hemispheric survey carried out with Telescope at Siding Spring Observatory in Australia, using six optical filters: u, v, g, r, i, z . DR2 is first to go beyond $\sim\!18$ mag (10 $\sigma$ ) limit Shallow Survey released (DR1), and includes portions sky full depth that reach $>\!21$ g r filters. The photometry has precision as measured by internal reproducibility 1% u v , 0.7% griz More than 21 000 $\deg^2$...
The discovery of the first electromagnetic counterpart to a gravitational wave signal has generated follow-up observations by over 50 facilities world-wide, ushering in new era multi-messenger astronomy. In this paper, we present event GW170817 and its SSS17a/DLT17ck (IAU label AT2017gfo) 14 Australian telescopes partner observatories as part Australian-based Australian-led research programs. We report early- late-time multi-wavelength observations, including optical imaging spectroscopy,...
We set out to determine the ratio, q(IR), of rest-frame 8-1000um flux, S(IR), monochromatic radio S(1.4GHz), for galaxies selected at far-IR and wavelengths, search signs that ratio evolves with redshift, luminosity or dust temperature, identify any far-IR-bright outliers - useful laboratories exploring why far-IR/radio correlation is generally so tight when prevailing theory suggests variations are almost inevitable. use flux-limited 250-um 1.4-GHz samples, obtained in GOODS-N using...
We exploit deep observations of the GOODS-N field taken with PACS, on board Herschel, as part PEP guaranteed time, to study link between star formation and stellar mass in galaxies z~2. Starting from a mass-selected sample ~4500 mag[4.5mu]<23 (AB), we identify ~350 objects PACS detection at 100 or 160mu ~1500 only Spitzer 24 mu counterpart. Stellar masses total IR luminosities (LIR) are estimated by fitting SEDs. Consistently other Herschel results, find that LIR based data is overestimated...
We compare the average star formation (SF) activity in X-ray selected AGN hosts with a mass-matched control sample of inactive galaxies, including both forming and quiescent sources, 0.5 < z 2.5 redshift range. Recent observations carried out by PACS, 60−210 μm photometric camera on board Herschel Space Observatory, GOODS-S, GOODS-N COSMOS allow us to obtain an unbiased estimate far-IR luminosity, hence SF properties, two samples. Accurate host stellar mass estimates are obtained decomposing...
The <i>Herschel<i/> Space Observatory enables us to accurately measure the bolometric output of starburst galaxies and active galactic nuclei (AGN) by directly sampling peak their far-infrared (IR) emission. Here we examine whether spectral energy distribution (SED) dust temperature have strongly evolved over last 80% age Universe. We discuss possible consequences for determination star-formation rates (SFR) any evidence a major change in properties. use deep extragalactic surveys from 100...
Sensitive Herschel far-infrared observations can break degeneracies that were inherent to previous studies of star formation in high-z AGN hosts. Combining PACS 100 and 160um the GOODS-N field with 2Msec Chandra data, we detect ~20% X-ray individually at >3sig. The host luminosity L2-10~10^43erg/s increases redshift by an order magnitude from z=0 z~1. In contrast, there is little dependence on luminosity, for L2-10<~10^44erg/s z>~1. We do not find a obscuring column, our sample which...
We study the co-existence of star formation and active galactic nucleus (AGN) activity in Chandra X-ray-selected AGN by analyzing stacked 870 μm submillimeter emission from a deep wide map Extended Deep Field South (ECDFS), obtained with LABOCA instrument at APEX telescope. The total X-ray sample 895 sources median redshift z ∼ 1 drawn combined (E)CDFS catalogs is detected >11σ significance mean flux 0.49 ± 0.04 mJy, corresponding to typical rate (SFR) around 30 M☉ yr−1 for T = 35 K, β 1.5...
We study the dust properties of galaxies in redshift range 0.1<z<2.8 observed by Herschel Space Observatory field Great Observatories Origins Deep Survey-North as part PEP and HerMES key programmes. Infrared (IR) luminosity (L_IR) temperature (T_dust) are derived from spectral energy distribution (SED) fit far-infrared (FIR) flux densities obtained with PACS SPIRE instruments onboard Herschel. As a reference sample, we also obtain IR luminosities temperatures local at z<0.1 using AKARI IRAS...
The `Local Volume HI Survey' (LVHIS) comprises deep spectral line and 20-cm radio continuum observations of 82 nearby, gas-rich galaxies, supplemented by multi-wavelength images. Our sample consists all galaxies with Local Group velocities v_LG < 550 km/s or distances D 10 Mpc that are detected in the Parkes All Sky Survey (HIPASS). Using full synthesis at least three configurations Australia Telescope Compact Array (ATCA), we obtain detailed maps for a complete Dec -30 deg. Here present...
Abstract We present the host-galaxy molecular gas properties of a sample 213 nearby (0.01 < z 0.05) hard-X-ray-selected active galactic nucleus (AGN) galaxies, drawn from 70-month catalog Swift’s Burst Alert Telescope (BAT), with 200 new CO(2–1) line measurements obtained James Clerk Maxwell and Atacama Pathfinder Experiment telescope. find that AGN in massive galaxies ( <?CDATA $\mathrm{log}({M}_{* }/{M}_{\odot })\gt 10.5$?> ) tend to have more higher fractions than inactive matched...
Abstract Galaxy interactions can significantly affect the star formation in galaxies, but it remains a challenge to achieve consensus on rate (SFR) enhancement galaxy pairs. Here, we investigate SFR of gas-rich pairs detected by Widefield ASKAP L -band Legacy All-sky Blind surveY. We construct sample 278 paired galaxies spanning stellar mass ( M * ) range from 10 7.6 11.2 ⊙ . obtain individual masses atomic hydrogen (H i for these using novel deblending algorithm H data cubes. Quantifying...
The constituents of the cosmic IR background (CIB) are studied at its peak wavelengths (100 and 160 <i>μ<i/>m) by exploiting <i>Herschel<i/>/PACS observations GOODS-N, Lockman Hole, COSMOS fields in PACS evolutionary probe (PEP) guaranteed-time survey. GOODS-N data reach 3<i>σ<i/> depths ~3.0 mJy 100 <i>μ<i/>m ~5.7 <i>μ<i/>m. At these levels, source densities 40 18 beams/source, respectively, thus hitting confusion limit Differential number counts extend from a few up to 100-200 mJy,...
The star formation rate (SFR) is a key parameter in the study of galaxy evolution. accuracy SFR measurements at z~2 has been questioned following disagreement between observations and theoretical models. latter predict SFRs this redshift that are typically factor 4 or more lower than measurements. We present star-formation rates based on calorimetric far-infrared (FIR) luminosities for massive 1.5<z<2.5, normal star-forming galaxies (SFGs), which do not depend extinction corrections and/or...
We introduce a method to estimate the HI mass within optical radius of disk galaxies from integrated spectra, with an uncertainty 0.09 dex. use these estimates study how inner fuels star formation in late-type galaxies. find that rate (SFR) at given stellar ($M_*$) is well correlated surface density ($\Sigma_{\rm HI,in}$) and mass-to-stellar ratio. For massive ($M_*>10^{10} M_{\odot}$) galaxies, higher SFR also related efficiency converting molecular gas, but no such correlation found for...
This study uses HI image data from the WALLABY pilot survey with ASKAP telescope, covering Hydra cluster out to 2.5$r_{200}$. We present projected phase-space distribution of HI-detected galaxies in Hydra, and identify that nearly two thirds within $1.25r_{200}$ may be early stages ram pressure stripping. More than half these only weakly stripped, ratio strippable (i.e., where galactic restoring force is lower disk) mass fraction (over total mass) distributed uniformly below 90%....
We present WALLABY pilot data release 1, the first public of HI survey from Wide-field ASKAP L-band Legacy All-sky Blind Survey (WALLABY) on Australian Square Kilometre Array Pathfinder. Phase 1 targeted three $60~{\rm deg}^2$ regions sky in direction Hydra and Norma galaxy clusters NGC 4636 group, covering redshift range z < 0.08. The source catalogue, images spectra nearly 600 extragalactic detections kinematic models for 109 spatially resolved galaxies are available. As containing nearby...
Abstract We present a statistical study of the properties diffuse H i in 10 nearby galaxies, comparing detected by single-dish telescope FAST (FEASTS program) and interferometer Very Large Array (THINGS program), respectively. The THINGS observation missed with median 23% due to short-spacing problem interferometry limited sensitivity. extract subtracting dense , which is obtained from data uniform flux-density threshold, total FAST. Among sample, diffuse-H fraction 34%, more found galaxies...
We use deep observations taken with the Photodetector Array Camera and Spectrometer (PACS), on board Herschel satellite as part of PACS evolutionary probe (PEP) guaranteed project along submm ground-based to measure dust mass a sample high-z submillimeter galaxies (SMGs). investigate their content relative stellar gas masses, compare them local star-forming galaxies. High-z SMGs are rich, i.e. they have higher dust-to-stellar ratios compared spiral (by factor 30) also ultraluminous infrared...
We use deep observations obtained with the Photodetector Array Camera and Spectrometer (PACS) onboard Herschel space observatory to study far-infrared (FIR) properties of submm optically faint radio galaxies (SMGs OFRGs). From literature we compiled a sample 35 securely identified SMGs nine OFRGs located in GOODS-N A2218 fields. This is cross-matched our PACS 100 um 160 multi-wavelength catalogs. About half are detected PACS. The dust temperatures infrared luminosities derived by fitting...
<i>Aims. <i/>We exploit the deepest existing far-infrared (FIR) data obtained so far by <i>Herschel<i/> at 100 and 160 <i>μ<i/>m in GOODS-N, as part of PACS evolutionary probe (PEP) survey, to derive for first time evolution rest-frame 60-<i>μ<i/>m, 90-<i>μ<i/>m, total IR luminosity functions (LFs) galaxies AGNs from <i>z<i/> = 0 unprecedented high redshifts (<i>z<i/> ~ 2–3).<i>Methods. <i/>The PEP LFs were computed using 1/<i>V<i/><sub>max<sub/> method. The FIR sources classified means a...
Abstract We use the single-dish radio telescope Five-hundred meter Aperture Spherical Telescope (FAST) to map H i in tidally interacting NGC 4631 group with a resolution of 3.′24 (7 kpc), reaching 5 σ column density limit 10 17.9 cm −2 assuming line width 20 km s −1 . Taking existing interferometric image from Hydrogen Accretion LOcal GAlaxieS project Westerbork Synthesis Radio as reference, we are able identify and characterize significant excess large-scale, low-density, diffuse group....