The availability of large data sets containing stellar parameters,distances,and extinctions for stars in the Milky Way,particularly within the Galactic disk,is essential for advancing our understanding of the Galaxy’...The availability of large data sets containing stellar parameters,distances,and extinctions for stars in the Milky Way,particularly within the Galactic disk,is essential for advancing our understanding of the Galaxy’s stellar populations,structure,kinematics,and chemical evolution.In this study,we present a catalog of stellar parameters,including effective temperature (T_(eff)),metallicity ([Fe/H]),absolute magnitudes (M_(G)),distances (d),and reddening values (E(G_(BP)-G_(RP))),for a sample of 141 million stars from the SkyMapper Southern Survey.These parameters are derived using the SPar algorithm,which employs a fitting procedure to match multi-band photometric observations and estimate the stellar properties (T_(eff),[Fe/H],M_(G),d,and E(G_(BP)-G_(RP))) on an individual star basis,following the methodology outlined in our previous work.This study successfully determines stellar parameters and extinction values simultaneously for stars located in high and low Galactic latitudes.The resulting stellar parameters and extinction values are in good agreement with results from other studies,demonstrating the robustness of our method.We derive a temperature dispersion of 195 K and a metallicity dispersion of 0.31 dex when comparing our results with spectroscopic data.The catalog produced in this work provides a valuable resource for future research on the Galactic metallicity distribution function,the structure of the Galaxy,threedimensional extinction mapping,and other related astrophysical topics.展开更多
基金supported by the National Natural Science Foundation of China12203016,12173034,12322304 and 12173013Natural Science Foundation of Hebei Province No.A2022205018,A2021205006,226Z7604G+4 种基金Yunnan University grant No.C619300A034Science Foundation of Hebei Normal University No.L2022B33.W.Y.Cacknowledges the science research grants from the China Manned Space Projectthe support of Physics Postdoctoral Research Station at Hebei Normal Universitythe science research grants from the China Manned Space Project with NOs.CMS-CSST-2021-A09,CMS-CSST-2021-A08 and CMS-CSST-2021-B03。
文摘The availability of large data sets containing stellar parameters,distances,and extinctions for stars in the Milky Way,particularly within the Galactic disk,is essential for advancing our understanding of the Galaxy’s stellar populations,structure,kinematics,and chemical evolution.In this study,we present a catalog of stellar parameters,including effective temperature (T_(eff)),metallicity ([Fe/H]),absolute magnitudes (M_(G)),distances (d),and reddening values (E(G_(BP)-G_(RP))),for a sample of 141 million stars from the SkyMapper Southern Survey.These parameters are derived using the SPar algorithm,which employs a fitting procedure to match multi-band photometric observations and estimate the stellar properties (T_(eff),[Fe/H],M_(G),d,and E(G_(BP)-G_(RP))) on an individual star basis,following the methodology outlined in our previous work.This study successfully determines stellar parameters and extinction values simultaneously for stars located in high and low Galactic latitudes.The resulting stellar parameters and extinction values are in good agreement with results from other studies,demonstrating the robustness of our method.We derive a temperature dispersion of 195 K and a metallicity dispersion of 0.31 dex when comparing our results with spectroscopic data.The catalog produced in this work provides a valuable resource for future research on the Galactic metallicity distribution function,the structure of the Galaxy,threedimensional extinction mapping,and other related astrophysical topics.
