论文标题
基于开放群集和头孢虫的GAIA DR3数据，银河头孢菌的光度量表的0.9％校准
A 0.9% Calibration of the Galactic Cepheid luminosity scale based on Gaia DR3 data of open clusters and Cepheids
论文作者
论文摘要
我们已经根据ESA Mission Gaia的第三个数据发布（DR3）的高质量天文学来搜索在古典银河系中的开放群集，以改善Leavitt Law（LL）的校准。我们的方法不需要对现有群集的事先了解，从而使我们能够检测新的主机群集和先前报道的关联交叉检查。我们的黄金样品包括34个居住在28个开放式簇中的头孢菌素，其中包括27个基本模式和7个泛音cepheids。报告了三个新的善意群集头（V0378 CEN，St Tau和GH Lup），并纠正了另外三个CRU，IQ NOR和SX VEL的主机群集识别。在太阳2 kpc之内发生的头簇中发生的头epe虫的分数为$ f_ {cc，2kpc} = 0.088^{+0.029} _ { - 0.019} $。通过将群集和现场头为结合，我们将LL校准了几个单个光度传递带，以及基于GAIA和HST光度法的无红wesenheit幅度，同时求解适用于Cepheid Parallaxes的残留偏移量，$Δ\ varpi _ {我们的结果与SH0ES距离梯子的最直接比较对于在近红外hst wesenheit幅度中的10D太阳金属性cepheid的绝对幅度获得了极好的（$0.3σ$）协议，$ m_ {h，1}^w = -5.914 $δ\ varpi _ {\ mathrm {cep}} = - 13 \ pm 5 \，μ$ as。使用较大的26个金簇头孢菌的样品和$ 225 $ MW的头孢菌素，以及最近的Gaia Dr3天文统计和光度法，我们以太阳金属性$ M_ {G，1}^W = -6.004 \ pm 0.019 $ \，mag and mag and mag和$δ\ varpi _ { 3 \，μ$ as。这些结果标志着纯粹基于MW CepheID的观察结果，目前最准确的头孢菌度光度量表的绝对校准。
We have conducted a search for open clusters in the vicinity of classical Galactic Cepheids based on high-quality astrometry from the third data release (DR3) of the ESA mission Gaia to improve the calibration of the Leavitt law (LL). Our approach requires no prior knowledge of existing clusters, allowing us to both detect new host clusters and cross-check previously reported associations. Our Gold sample consists of 34 Cepheids residing in 28 open clusters, including 27 fundamental mode and 7 overtone Cepheids. Three new bona fide cluster Cepheids are reported (V0378 Cen, ST Tau, and GH Lup) and the host cluster identifications for three others (VW Cru, IQ Nor, and SX Vel) are corrected. The fraction of Cepheids occurring in open clusters within 2 kpc of the Sun is $f_{CC,2kpc} = 0.088^{+0.029}_{-0.019}$. By combining cluster and field Cepheids, we calibrate the LL for several individual photometric passbands, together with reddening-free Wesenheit magnitudes based on Gaia and HST photometry, while solving for the residual offset applicable to Cepheid parallaxes, $Δ\varpi_{\mathrm{Cep}}$. The most direct comparison of our results with the SH0ES distance ladder yields excellent ($0.3σ$) agreement for both the absolute magnitude of a 10d solar metallicity Cepheid in the near-IR HST Wesenheit magnitudes, $M_{H,1}^W=-5.914\pm 0.017$ mag, and the residual parallax offset, $Δ\varpi_{\mathrm{Cep}}=-13 \pm 5\,μ$as. Using the larger sample of 26 Gold cluster Cepheids and $225$ MW Cepheids with recent Gaia DR3 astrometry and photometry, we determine at solar metallicity $M_{G,1}^W = -6.004 \pm 0.019$\,mag and $Δ\varpi_{\mathrm{Cep}}=-19 \pm 3\,μ$as. These results mark the currently most accurate absolute calibrations of the Cepheid luminosity scale based purely on observations of MW Cepheids.
