斯隆数字巡天第五期(SDSS-V)发布了Data Release 20(DR20)，包含超过300万条新光谱数据及18个附加值目录1。这次数据发布标志着该项目首次将光学观测范围扩展至南半球，结合来自美国新墨西哥州Apache Point Observatory和智利Las Campanas Observatory的观测成果1。
此次数据集涵盖多个科学研究方向。黑洞测绘计划(Black Hole Mapper)贡献约110万条BOSS光谱，涉及约50万个不同天体1；银河系测绘计划(Milky Way Mapper)覆盖150万颗恒星1；局部宇宙测绘计划(Local Volume Mapper)包含169个观测区域的约30万条光谱1。这些数据揭示了黑洞、稀有恒星、星云和X射线源等多种天体现象。数据收集工作截至2025年2月2日1。
SDSS合作项目研究人员Emily Griffith表示，"DR20代表了SDSS数据产品规模的巨大飞跃"1。
The Sloan Digital Sky Survey Collaboration has released Data Release 20 (DR20), marking a major expansion of astronomical observation capabilities 1. The dataset encompasses more than three million new spectral records alongside eighteen additional value catalogs 1, representing what Dr. Emily Griffith describes as "a tremendous leap in the scale of SDSS data products" 1.
This release represents a watershed moment for global cosmic research by integrating observations from both hemispheres for the first time 1. The Northern Hemisphere observations continue from Apache Point Observatory in New Mexico, while the Southern Hemisphere contributions originate from Las Campanas Observatory in Chile 1. The dataset, compiled through February 2, 2025, encompasses diverse celestial phenomena including black holes, rare stars, nebulae, and X-ray sources 1.
The DR20 comprises three major mapping initiatives with complementary scientific objectives 1. The Black Hole Mapper contains approximately 1.1 million BOSS spectra representing roughly 500,000 distinct celestial objects 1. The Milky Way Mapper covers 1.5 million stars across the galactic disk and halo 1. The Local Volume Mapper contributes 169 tiles containing approximately 300,000 spectra focused on nearby cosmic structures 1. Together, these components provide an unprecedented panoramic view of the universe, enabling researchers worldwide to investigate phenomena previously obscured or incompletely mapped 1.
评论
还没有评论，欢迎留下第一条。