Gaia Data Release 3 Summary of the content and survey properties
Gaia Data Release 3 Summary of the content and survey properties
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DOI：
10.1051/0004-6361/202243940
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发表时间：
2023-06-16
影响因子：
6.5
通讯作者：
Zwitter, T.
中科院分区：
文献类型：
--
作者：
Vallenari, A.;Brown, A. G. A.;Zwitter, T.
上下文。我们介绍了欧洲航天局的Gaia任务Gaia DR3的第三次数据发布。这份新闻稿包括了大量新的数据产品，特别是大大扩展的径向速度测量和非常广泛的Gaia源的天体物理特征。目标。我们概述了Gaia DR3的内容和属性，概述了与以前的数据版本(如果适用)相比在数据处理方面的主要改进，并简要讨论了此版本中数据的限制。方法：研究方法。盖亚DR3星表是盖亚数据处理和分析联盟在执行任务的前34个月中用盖亚仪器收集的原始数据进行处理的结果。结果。Gaia DR3星表包含了在第三次数据发布Gaia EDR3中已经存在的G、GBP和G(RP)通带中的相同来源列表、天体位置、自行、视差和宽带测光。Gaia DR3推出了令人印象深刻的丰富的新数据产品。根据盖亚收集的数据，G(RVS)-14和3100-T-Effe；14500范围内的3300万多个天体有了新的平均径向速度测定结果。我们为大多数具有径向速度的震源提供了GRVS震级，并列出了其中的一个子集的线宽参数。平均盖亚光谱可供社区使用。Gaia DR3星表包括来自径向速度光谱仪的大约100万个平均光谱，以及大约2.2亿个低分辨率蓝红棱镜光度计BP/Rp平均光谱。提供了24种变率类型的约1,000万个来源的历元光度分析结果。Gaia DR3包括大约4.7亿和1.5亿个源的天体物理参数和源类概率，包括恒星、星系和类星体。提供了大约80万个天体测量、光谱和日食双星的轨道元素和趋势参数。超过15万个太阳系天体，包括新的发现，带有初步的轨道解和单独的历元观测是此次发布的一部分。根据新纪元BP/RP光谱数据得到的反射光谱公布了大约6万颗小行星的反射光谱。最后，还提供了一个额外的数据集，即盖亚仙女座星系测光调查，其中包括以仙女座星系为中心的半径为5：5的场中所有来源的测光时间序列。结论。这次数据发布相对于Gaia DR2和Gaia EDR3来说是一个重大进步，因为源天体物理数据的数量、质量和多样性都是前所未有的。到目前为止，这是从低分辨率和高分辨率光谱得出的全天分光光度、径向速度、变星和天体物理参数的最大集合，并包括对SSO进行的最高精度的分光光度和动力学测量。非单星含量超过现有数据几个数量级。类星体主机和星系光轮廓收集是第一次完全基于天空和太空的此类调查。盖亚DR3中提供的天体物理信息将充分释放盖亚精密的天体测量、光度测量和径向速度测量的潜力。
Context. We present the third data release of the European Space Agency's Gaia mission, Gaia DR3. This release includes a large variety of new data products, notably a much expanded radial velocity survey and a very extensive astrophysical characterisation of Gaia sources. Aims. We outline the content and the properties of Gaia DR3, providing an overview of the main improvements in the data processing in comparison with previous data releases (where applicable) and a brief discussion of the limitations of the data in this release. Methods. The Gaia DR3 catalogue is the outcome of the processing of raw data collected with the Gaia instruments during the first 34 months of the mission by the Gaia Data Processing and Analysis Consortium. Results. The Gaia DR3 catalogue contains the same source list, celestial positions, proper motions, parallaxes, and broad band photometry in the G, GBP, and G(RP) pass-bands already present in the Early Third Data Release, Gaia EDR3. Gaia DR3 introduces an impressive wealth of new data products. More than 33 million objects in the ranges G(RVS) < 14 and 3100 < T-eff < 14 500, have new determinations of their mean radial velocities based on data collected by Gaia. We provide GRVS magnitudes for most sources with radial velocities, and a line broadening parameter is listed for a subset of these. Mean Gaia spectra are made available to the community. The Gaia DR3 catalogue includes about 1 million mean spectra from the radial velocity spectrometer, and about 220 million low-resolution blue and red prism photometer BP /RP mean spectra. The results of the analysis of epoch photometry are provided for some 10 million sources across 24 variability types. Gaia DR3 includes astrophysical parameters and source class probabilities for about 470 million and 1500 million sources, respectively, including stars, galaxies, and quasars. Orbital elements and trend parameters are provided for some 800 000 astrometric, spectroscopic and eclipsing binaries. More than 150 000 Solar System objects, including new discoveries, with preliminary orbital solutions and individual epoch observations are part of this release. Reflectance spectra derived from the epoch BP /RP spectral data are published for about 60 000 asteroids. Finally, an additional data set is provided, namely the Gaia Andromeda Photometric Survey, consisting of the photometric time series for all sources located in a 5:5 degree radius field centred on the Andromeda galaxy. Conclusions. This data release represents a major advance with respect to Gaia DR2 and Gaia EDR3 because of the unprecedented quantity, quality, and variety of source astrophysical data. To date this is the largest collection of all-sky spectrophotometry, radial velocities, variables, and astrophysical parameters derived from both low- and high-resolution spectra and includes a spectrophotometric and dynamical survey of SSOs of the highest accuracy. The non-single star content surpasses the existing data by orders of magnitude. The quasar host and galaxy light profile collection is the first such survey that is all sky and space based. The astrophysical information provided in Gaia DR3 will unleash the full potential of Gaia's exquisite astrometric, photometric, and radial velocity surveys.