论文标题
天体物理距离量表：V。通过JAGB方法，红色巨型分支的尖端和Leavitt Law，距本地组螺旋M33的距离为2％
The Astrophysical Distance Scale: V. A 2% Distance to the Local Group Spiral M33 via the JAGB Method, Tip of the Red Giant Branch, and Leavitt Law
论文作者
论文摘要
J-Region渐近巨型分支（JAGB）方法是一种新的标准蜡烛，基于稳定的固有J波段颜色选择的碳星的幅度，并且具有与其他主要距离指标（如头孢虫和TRGB）相当的精度。我们进一步测试了本地组Galaxy M33中JAGB方法的准确性。 M33的中等倾斜度，低金属性和附近的接近度使其成为测试局部距离指标系统学测试的理想实验室。使用高精度光学BVI和近红外JHK光度法，我们探讨了三个独立距离指标的应用：JAGB方法，Cepheid Leavitt Law和TRGB。我们发现：$μ_0$（trgb i）= 24.72 +/- 0.02（stat）+/- 0.07（sys）mag，$μ_0$（trgb nir）= 24.72 +/- 0.04（STAT）+/- 0.10（STAT）+/- 0.10（sys）mag，$μ____0$（jagb） $μ_0$（CEPHEID）= 24.71 +/- 0.04（stat）+/- 0.01（sys）mag。我们还首次使用基于地面和空间的光度法直接比较JAGB距离。我们测量：使用（F814-F110W）的颜色组合以有效隔离JAGB恒星，$μ_0$（JAGB F110W）= 24.71 +/- 0.06（STAT）+/- 0.05（SYS）MAG。在本文中，我们测量到M33准确至2％的距离，并提供了进一步的证据，表明JAGB方法是一种强大的毛外距离指标，可以使用基于间隔的观测值有效地探测哈勃常数的局部测量。我们希望使用JWST的观察结果在不久的将来通过JAGB方法测量哈勃常数。
The J-region asymptotic giant branch (JAGB) method is a new standard candle that is based on the stable intrinsic J-band magnitude of color-selected carbon stars, and has a precision comparable to other primary distance indicators such as Cepheids and the TRGB. We further test the accuracy of the JAGB method in the Local Group Galaxy M33. M33's moderate inclination, low metallicity, and nearby proximity make it an ideal laboratory for tests of systematics in local distance indicators. Using high-precision optical BVI and near-infrared JHK photometry, we explore the application of three independent distance indicators: the JAGB method, the Cepheid Leavitt Law, and the TRGB. We find: $μ_0$ (TRGB I) = 24.72 +/- 0.02 (stat) +/- 0.07 (sys) mag, $μ_0$ (TRGB NIR) = 24.72 +/- 0.04 (stat) +/- 0.10 (sys) mag, $μ_0$ (JAGB) = 24.67 +/- 0.03 (stat) +/- 0.04 (sys) mag, $μ_0$ (Cepheid) = 24.71 +/- 0.04 (stat) +/- 0.01 (sys) mag. For the first time, we also directly compare a JAGB distance using ground-based and space-based photometry. We measure: $μ_0$ (JAGB F110W) = 24.71 +/- 0.06 (stat) +/- 0.05 (sys) mag using the (F814-F110W) color combination to effectively isolate the JAGB stars. In this paper, we measure a distance to M33 accurate to 2% and provide further evidence that the JAGB method is a powerful extragalactic distance indicator that can effectively probe a local measurement of the Hubble constant using spaced-based observations. We expect to measure the Hubble constant via the JAGB method in the near future, using observations from JWST.
