论文标题
M37与Gaia和宽场Ugi Imaging的Astro射光研究
Astro-photometric study of M37 with Gaia and wide-field ugi-imaging
论文作者
论文摘要
我们提出了银河开放星簇M37（NGC 2099）的星体和光度广场研究。观察到研究的场，地面图像覆盖了斯隆样过滤器UGI中约四个平方度的区域。我们利用Gaia目录来校准大型田间马赛克的几何变形，开发了可以应用于其他宽场仪器的软件例程。数据用于识别M37的最热的白矮人（WD）候选。多亏了Gaia EDR3精美的天文测量，我们确定了七个这样的WD候选者，除了是高概率的星形构件外，其中一个是行星星云的推定中心之星。据我们所知，这是一个开放群集中的独特对象，我们获得了后续的低分辨率光谱，用于定性表征该年轻的WD。最后，我们公开发布了三色图集和视野中的一系列来源，这代表了现有材料的补充。
We present an astrometric and photometric wide-field study of the Galactic open star cluster M37 (NGC 2099). The studied field was observed with ground-based images covering a region of about four square degrees in the Sloan-like filters ugi. We exploited the Gaia catalogue to calibrate the geometric distortion of the large field mosaics, developing software routines that can be also applied to other wide-field instruments. The data are used to identify the hottest white dwarf (WD) member candidates of M37. Thanks to the Gaia EDR3 exquisite astrometry we identified seven such WD candidates, one of which, besides being a high-probability astrometric member, is the putative central star of a planetary nebula. To our knowledge, this is a unique object in an open cluster, and we have obtained follow-up low-resolution spectra that are used for a qualitative characterisation of this young WD. Finally, we publicly release a three-colour atlas and a catalogue of the sources in the field of view, which represents a complement of existing material.
