A5008008026- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Astrophysical Phenomena and Observations
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Historical Astronomy and Related Studies
- Immunotherapy and Immune Responses
- Adaptive optics and wavefront sensing
- Complex Systems and Time Series Analysis
- Metallurgy and Material Forming
- Composite Structure Analysis and Optimization
- Solar and Space Plasma Dynamics
- Industrial Vision Systems and Defect Detection
- Quantum, superfluid, helium dynamics
- History and Developments in Astronomy
Sun Yat-sen University
2019-2024
Nanjing Tech University
2024
Hebei University of Technology
2024
Xuzhou Medical College
2024
Guangdong Polytechnic Normal University
2022-2023
China First Heavy Industries (China)
2023
Xi'an Technological University
2023
Chinese Academy of Medical Sciences & Peking Union Medical College
2023
Lanzhou University
2022
State Key Laboratory of Applied Organic Chemistry
2022
The mass domain where massive extrasolar planets and brown dwarfs overlap is still poorly understood due to the paucity of orbiting close solar-type stars, so-called dwarf desert. In this paper, we collect all available data about around stars their host from literature study demographics clearly show a short period medium gap in period–mass distribution diagram (35 < m sin i 55MJup P 100 d), representing ‘driest land’ Observation biases are highly unlikely cause its mass, which can be...
Abstract We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous work. find 914 signals periods longer than 1000 days. Around these signals, 167 cold giants 68 other types of companions are identified, through combined analyses velocity, astrometry, imaging data. Without correcting for detection bias, we estimate the minimum occurrence rate wide-orbit brown dwarfs to be...
The digital twin-driven performance model provides an attractive option for the warn gas-path faults of gas turbines. However, three technical difficulties need to be solved: (1) low modeling precision caused by individual differences between turbines, (2) poor solution efficiency due excessive iterations, and (3) false alarm missing brought traditional fixed threshold method. This paper proposes a twin model-based early warning method that breaks through above obstacles from aspects....
In this work, bending and dynamic analyses of a three-layered functionally graded micro annular plate whit piezomagnetic layers are investigated based on FSD circular theory. The is subjected to magnetic field. It assumed that the resting an orthotropic elastic medium. stress relations which cooperate both mechanical interactions calculated MSGT governing equations extracted through Hamilton's principles. order solve plate, numerical Ritz method applied. After convergence solving domain...
Abstract Galactic short-period close white dwarf binaries (CWDBs) are important objects for space-borne gravitational-wave (GW) detectors in the millihertz frequency bands. Due to intrinsically low luminosity, only about 25 identified CWDBs detectable by Laser Interferometer Space Antenna (LISA), which also known as verification (VBs). The Gaia Early Data Release 3 (EDR3) provids a catalog containing large number of CWDB candidates, includes parallax and photometry measurements. We...
Abstract Many hot Jupiters may experience orbital decays, which are manifested as long-term transit-timing variations. We have analyzed 7068 transits from the Transiting Exoplanet Survey Satellite (TESS) for a sample of 326 Jupiters. These new mid-transit-time data allow us to update ephemerides these systems. By combining TESS with archival data, we searched possible variations in period using linear and quadratic ephemeris model. identified 26 candidates that exhibit period, including 18...
We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with mass 1.477 (-0.067, +0.066) M_J, and radius 1.345 +/- 0.072 R_J, an orbital period 2.7033904 0.000010 days. The host star, KELT-3, is V=9.8 late F star M_* = 1.278 (-0.061, +0.063) M_sun, R_* 1.472 +0.065) R_sun, T_eff 6306 (-49, +50) K, log(g) 4.209 (-0.031, +0.033), [Fe/H] 0.044 (-0.082, +0.080), has likely proper motion companion. KELT-3b third exoplanet discovered by KELT survey, orbiting one 20...
We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting brightest component a hierarchical triple stellar system. The host star is F with = K, , and . best-fit linear ephemeris With magnitude V ∼ 10, planetary radius mass it among population inflated Jupiters (RP > 1.5RJ), making valuable for probing nature planets. In addition, its existence within proximity to Earth (210 pc) provide unique opportunity dynamical studies continued monitoring high resolution imaging...
Abstract Comparing chemical abundances of a planet and the host star reveals origin formation pathway planet. Stellar abundance is measured with high-resolution spectroscopy. Planet abundance, on other hand, usually inferred from low-resolution data. For directly imaged exoplanets, data are available slew high-contrast imaging/spectroscopy instruments. Here, we study HR 8799 its c. We measure stellar using LBT/PEPSI ( R = 120,000) archival HARPS data: [C/H], [O/H], C/O 0.11 ± 0.12, 0.12...
Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ~5 AU in mass range ~10 - 80 M$_{\text{Jup}}$. This deficit, known as brown dwarf desert, currently has no conclusive explanation. New substellar this region help asses reality desert and provide insight formation evolution these objects. Here we present 10 new two low-mass stellar companion candidates around from Multi-object APO Radial-Velocity Exoplanet Large-Area Survey (MARVELS)...
(Abridged) The Census of High- and Medium-mass Protostars (CHaMP) is the first large-scale (280 degree<l<300 degree, -4 degree<b<2 degree), unbiased, sub-parsec resolution survey Galactic molecular clumps their embedded stars. Barnes et al. (2011) presented source catalog ~300 based on HCO+(1-0) emission, used to estimate masses M. Here we use archival mid-infrared mm continuum data construct spectral energy distributions. Fitting two-temperature grey-body models, derive bolometric...
Context. A new X-ray Cataclysmic variable (CV) candidate exhibits distinct light-curve characteristics in the ZTF’s g , r and i bands. The paper includes optical identification multiwavelength analysis of this CV candidate. Aims. This work aims to determine if a previously identified candidate, ZTF J0112+5827, is polar system by examining its cyclotron radiation characteristics. Methods. We characterized emission J0112+5827 using ROSAT observations. gri -band light curves were obtained from...
Abstract Quasar outflows often consist of two clouds with velocity separations matching the doublet spacings common UV resonance transitions, a phenomenon known as line locking, which is commonly observed in quasar spectra. Multiple can be locked together through multi-ion doublets, forming “line-locking web.” In second paper TOLL project, we present discovery one largest webs” to date from Very Large Telescope UVES spectra QSO J151352+085555. We identify 12 associated narrow absorption...
Abstract The ExoEcho project is designed to study the photodynamics of exoplanets by leveraging high-precision transit timing data from ground- and space-based telescopes. Some are experiencing orbital decay, variation (TTV) a useful technique their period variations. In this study, we have obtained middle-time Hubble Space Telescope observations for 37 short-period exoplanets, most which hot Jupiters. To search potential long- short-term variations within sample, conduct TTV model fitting...
A 34-year-old woman was referred to our hospital at 24+4 weeks of gestation for further evaluation two cystic masses in the fetal abdomen. The patient had a history antiphospholipid syndrome and receiving aspirin anticoagulation. No other medications were taken during organogenesis. Noninvasive DNA screening Down yielded negative results. Whole exome sequencing chromosome analysis revealed no abnormalities, there family congenital anomalies. upper pulsatile mass measured 41×35×30 mm located...
The Kepler mission has yielded a large number of planet candidates from among the Objects Interest (KOIs), but spectroscopic follow-up these relatively faint stars is serious bottleneck in confirming and characterizing systems. We present motivation survey design for an ongoing project with SDSS-III multiplexed APOGEE near-infrared spectrograph to monitor hundreds KOI host stars. report some our first results using representative targets sample, which include current that we find be false...
The census of exoplanets is incomplete for orbital distances larger than 1 AU. Here, we present 41 long-period planet candidates in 38 systems identified by Planet Hunters based on Kepler archival data (Q0–Q17). Among them, 17 exhibit only one transit, 14 have two visible transits, and 10 more three transits. For with estimate their periods transit duration host star properties. majority the this work (75%) that correspond to 1–3 AU from stars. We conduct follow-up imaging spectroscopic...
We report the detections of a giant planet (MARVELS-7b) and brown dwarf candidate (MARVELS-7c) around primary star in close binary system, HD 87646. It is first system with more than one substellar circum-primary companion discovered to best our knowledge. The detection this was accomplished using multi-object Doppler instrument (KeckET) at Sloan Digital Sky Survey (SDSS) telescope. Subsequent radial velocity observations ET Kitt Peak National Observatory, HRS HET, "Classic" spectrograph...
Combining stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity, with barycentric radial velocity data provides insight into the chemo-dynamics of Milky Way our local Galactic environment. We analyse 3075 stars spectroscopic from Sloan Digital Sky Survey III MARVELS survey present parameters for 2343 dwarf using spectral indices method, a modified version equivalent width method. velocities sample 2610 median uncertainty 0.3 km s−1. determine ages...
We present 127 new transit light curves for 39 hot Jupiter systems, obtained over the span of five years by two ground-based telescopes. A homogeneous analysis these newly collected together with archived spectroscopic, photometric, and Doppler velocimetric data using EXOFASTv2 leads to a significant improvement in physical orbital parameters each system. All our stellar radii are constrained accuracies better than 3\%. The planetary 37 targets determined $5\%$. Compared results, literature...