A5093975766- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Gamma-ray bursts and supernovae
- CCD and CMOS Imaging Sensors
- Infrared Target Detection Methodologies
- Solar and Space Plasma Dynamics
Abstract By combining spectra from the CALSPEC and NGSL, as well spectroscopic data LAMOST Data Release 7 (DR7), we have analyzed corrected systematic errors of Gaia DR3 BP/RP (XP) spectra. The depend on normalized spectral energy distribution (simplified by two independent “colors”) G magnitude. Our corrections are applicable in range approximately −0.5 < BP − RP 2, 3 17.5, E ( B V ) 0.8. To validate our correction, conduct tests comparisons with MILES LEMONY results demonstrate that...
Abstract We present an independent validation and comprehensive recalibration of S-PLUS Ultra-short Survey (USS) DR1 12-band photometry using about 30,000–70,000 standard stars from the Best Star (BEST) database. identify spatial variation zero-point offsets, up to 30–40 mmag for blue filters ( u , J 0378, 0395) 10 others, predominantly due higher uncertainties technique employed in original USS calibration. Moreover, we detect large- medium-scale CCD position-dependent systematic errors, 50...
Abstract We present a catalog of stellar parameters (effective temperature T eff , surface gravity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>log</mml:mi> <mml:mi>g</mml:mi> </mml:math> age, and metallicity [Fe/H]) elemental-abundance ratios ([C/Fe], [Mg/Fe], [ α /Fe]) for some five million stars (4.5 dwarfs 0.5 giant stars) in the Milky Way, based on colors from Javalambre Photometric Local Universe Survey (J-PLUS) DR3 Gaia EDR3. These estimates are...
Abstract The stellar atmospheric parameters and physical properties of stars in the Kepler Input Catalog (KIC) are great significance for study exoplanets, activity, asteroseismology. However, despite extensive effort over past decades, accurate spectroscopic estimates these available only about half full KIC. In our work, by training relationships between photometric colors from Gaia DR3, Kepler-INT Survey, Large Sky Area Multi-Object Fiber Spectroscopic Telescope DR10, Galactic Evolution...
Abstract Stellar parameters for large samples of stars play a crucial role in constraining the nature and stellar populations Galaxy. An increasing number medium-band photometric surveys are presently used estimating parameters. In this study, we present machine learning approach to derive estimates parameters, including [Fe/H], log g , T eff based on combination broadband observations. Our analysis employs data primarily sourced from Abundances Galactic Evolution Survey (SAGES), which aims...
Abstract We present a pioneering achievement in the high-precision photometric calibration of CMOS-based photometry, by application Gaia Blue Photometer or Red (XP) spectra–based synthetic photometry method to mini-SiTian array (MST) photometry. Through 79 repeated observations f02 field on night, we find good internal consistency calibrated MST G -band magnitudes for relatively bright stars, with precision about 4 mmag ∼ 13. Results from more than 30 different nights (over 3100...
Abstract Utilizing high-cadence and continuous g - r -band data over three nights acquired from the 3.6 m Canada–France–Hawaii Telescope, aiming to find short-duration microlensing events, we conduct a systematic search for variables, transients, asteroids across ∼1° field of view Andromeda galaxy (M31). We present catalog 5859 variable stars, yielding most extensive compilation short-period sources M31. also detected 19 flares, predominantly associated with foreground M dwarfs in Milky Way....