Presolar Grain Database - Silicon Carbide

The Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009. It has been a helpful tool used by many researchers in cosmochemistry and astrophysics. However, over the years, accumulated errors compromised major parts of the PGD. Here, we provide a fresh start, with the PGD for silicon carbide (SiC) grains rebuilt from the ground up. The PGD is provided here in two formats: (1) as Microsoft Excel (.xlsx) file, containing the main database as one large spreadsheet and additional information on extra spreadsheets, (2) as comma-separated ASCII (.csv) file containing the main database.前太阳颗粒数据库（Presolar Grain Database, PGD）收录了当前绝大多数关于前太阳颗粒的同位素数据（含已发表与未发表内容），并于2009年首次以电子表格合集的形式发布。该数据库长期以来均为宇宙化学与天体物理学领域诸多研究者提供了有力支持。然而随着时间推移，累积的错误已对PGD的核心模块造成了严重破坏。为此，我们全新启动重构工作，从头搭建了碳化硅（SiC）颗粒对应的PGD。本次提供的PGD包含两种格式：(1) 微软Excel（.xlsx）格式文件，主数据库存储于单个大型电子表格中，额外信息则收录于附属电子表格内；(2) 逗号分隔ASCII（.csv）格式文件，仅包含主数据库内容。