Gaia 聚焦产品发布：来自业务接口功能图像分析的信源——半人马座ω中五十万新源
太阳与恒星天体物理
2023-12-13 v2 星系天体物理
摘要
Gaia 的读出窗口策略在天空极密集场中面临挑战。因此，除标准 Gaia 观测外，还为天空中九个选定区域记录了完整的天图（SM）图像。一条新软件流水线利用这些拥挤场（CFs）的业务接口功能（SIF）图像，借助可用的完整二维（2D）信息。该新流水线在半人马座ω（ Cen）星团区域产生了五十万额外的 Gaia 源，随本次聚焦产品发布一同发表。我们讨论了专用的 SIF CF 数据归约流水线，验证其数据产品，并介绍其 Gaia 归档表。我们的目标是在天空极密集区域 Cen 改善 {\it Gaia} 源清单的完备性。采用 adapted 版 {\it Gaia} 源检测与图像参数确定软件在 2D SIF CF 图像中定位源。我们通过将其与公开 {\it Gaia} DR3 星表及外部哈勃空间望远镜数据比较来验证结果。本次聚焦产品发布为 Cen 中的 {\it Gaia} 星表新增了 526\,587 个新源。除位置与亮度外，附加星表包含视差与自行，但无有意义颜色信息。尽管 SIF CF 源参数精度一般低于标称 {\it Gaia} 源，在星团中心它们将合并星表深度提升三等，并将源密度提高十倍。这首次 SIF CF 数据发布已为 {\it Gaia} 星表增添巨大价值。它展示了即将包含的第四版 {\it Gaia} 星表可期之处，该版将含全部九个 SIF CF 区域的附加源。
引用
@article{arxiv.2310.06551,
title = {Gaia Focused Product Release: Sources from Service Interface Function image analysis -- Half a million new sources in omega Centauri},
author = {Gaia Collaboration and K. Weingrill and A. Mints and J. Castañeda and Z. Kostrzewa-Rutkowska and M. Davidson and F. De Angeli and J. Hernández and F. Torra and M. Ramos-Lerate and C. Babusiaux and M. Biermann and C. Crowley and D. W. Evans and L. Lindegren and J. M. Martín-Fleitas and L. Palaversa and D. Ruz Mieres and K. Tisanić and A. G. A. Brown and A. Vallenari and T. Prusti and J. H. J. de Bruijne and F. Arenou and A. Barbier and O. L. Creevey and C. Ducourant and L. Eyer and R. Guerra and A. Hutton and C. Jordi and S. A. Klioner and U. Lammers and X. Luri and F. Mignard and S. Randich and P. Sartoretti and R. Smiljanic and P. Tanga and N. A. Walton and C. A. L. Bailer-Jones and U. Bastian and M. Cropper and R. Drimmel and D. Katz and C. Soubiran and F. van Leeuwen and M. Audard and J. Bakker and R. Blomme and C. Fabricius and M. Fouesneau and Y. Frémat and L. Galluccio and A. Guerrier and E. Masana and R. Messineo and C. Nicolas and K. Nienartowicz and F. 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journal= {arXiv preprint arXiv:2310.06551},
year = {2023}
}