Building the cosmic distance scale: from Hipparcos to Gaia
Catherine Turon, Xavier Luri, Eduard Masana
备注:
16 pages, 16 figures, Conference "The Fundamental Cosmic Distance scale: State of the Art and the Gaia perspective, 3-6 May 2011, INAF, Osservatorio Astronomico di Capodimonte, Naples. Accepted for publication in Astrophysics & Space Science
依巴谷是有史以来第一个全球天体测量实验,由欧空局于1989年发射,其结果于1997年发表(Perryman等人,太空人。太空人。323,L49,1997; Perryman & ESA(eds),The Hipparcos and Tycho catalogues,ESA SP-1200,1997)。后来使用改进的卫星姿态重建进行了新的简化,从而提高了对亮度超过9等的恒星的精度(van Leeuwen & Fantino,Astron. Astrophys. 439,791,2005; van Leeuwen,Astron. Astrophys. 474,653,2007)。依巴谷星表提供了非常精确的天体测量数据(位置、三角视差和自行)的扩展数据集,将距离测定和光度校准的数量和质量提高了两个数量级。超过20000颗恒星的三角视差已知优于10%的可用性开辟了道路,我们的三维知识的太阳邻域的大幅修订和更新的校准许多距离指标和年龄估计。计划于2013年6月发射的欧空局下一个基石盖亚开辟了前景(Perryman等人,太空人。太空人。369,339,2001),仍然是更戏剧性的:十亿对象与系统和准同步天体测量,分光光度和光谱观测,约1.5亿颗恒星的预期距离超过10%,遍布银河系。将直接测量大量的所有恒星距离指标,直接校准其光度,并有可能详细研究与化学元素丰度、年龄或星团成员有关的各种效应的影响。借助从DPAC开发的任务模拟器中获得的盖亚预期数据的模拟,我们将通过一些选定的例子说明盖亚可以提供什么。
英文摘要:
Hipparcos, the first ever experiment of global astrometry, was launched by ESA in 1989 and its results published in 1997 (Perryman et al., Astron. Astrophys. 323, L49, 1997; Perryman & ESA (eds), The Hipparcos and Tycho catalogues, ESA SP-1200, 1997). A new reduction was later performed using an improved satellite attitude reconstruction leading to an improved accuracy for stars brighter than 9th magnitude (van Leeuwen & Fantino, Astron. Astrophys. 439, 791, 2005; van Leeuwen, Astron. Astrophys. 474, 653, 2007).
The Hipparcos Catalogue provided an extended dataset of very accurate astrometric data (positions, trigonometric parallaxes and proper motions), enlarging by two orders of magnitude the quantity and quality of distance determinations and luminosity calibrations. The availability of more than 20000 stars with a trigonometric parallax known to better than 10% opened the way to a drastic revision of our 3-D knowledge of the solar neighbourhood and to a renewal of the calibration of many distance indicators and age estimations. The prospects opened by Gaia, the next ESA cornerstone, planned for launch in June 2013 (Perryman et al., Astron. Astrophys. 369, 339, 2001), are still much more dramatic: a billion objects with systematic and quasi simultaneous astrometric, spectrophotometric and spectroscopic observations, about 150 million stars with expected distances to better than 10%, all over the Galaxy. All stellar distance indicators, in very large numbers, will be directly measured, providing a direct calibration of their luminosity and making possible detailed studies of the impacts of various effects linked to chemical element abundances, age or cluster membership. With the help of simulations of the data expected from Gaia, obtained from the mission simulator developed by DPAC, we will illustrate what Gaia can provide with some selected examples.
Detecting and Characterizing Companions with a Calibrated Gaia DR2, DR3, and Hipparcos Catalog (G23H)
NRC Herzberg Astronomy and Astrophysics(国家研究委员会赫茨伯格天文学与天体物理学研究所);Department of Physics and Astronomy, University of Victoria(维多利亚大学物理与天文系);Heising-Simons Foundation(海辛-西蒙斯基金会);Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles(加州大学洛杉矶分校地球、行星与空间科学系);Department of Physics, University of California, Santa Barbara(加州大学圣塔芭芭拉分校物理系);Department of Astronomy & Astrophysics, University of California, San Diego(加州大学圣地亚哥分校天文与天体物理学系);Department of Astronomy, New Mexico State University(新墨西哥州立大学天文系)
True Masses using RV data with Hipparcos and Gaia Astrometry
INAF – Osservatorio Astronomico di Palermo(意大利国家天体物理研究所巴勒莫天文台);Dipartimento di Fisica e Chimica, Università degli Studi di Palermo(巴勒莫大学物理与化学系);INAF – Osservatorio Astrofisico di Torino(意大利国家天体物理研究所都灵天文台);Dipartimento di Fisica, Università degli Studi di Torino(都灵大学物理系)
Michael Perryman采访了Hipparcos和Gaia任务的一些科学家和项目负责人,这些人的照片在他的网站上给出:https://www.michaelperryman.co.uk。迈克尔还写了散文--到目前为止有84篇!--关于盖亚任务的结果,它们被放置在他的网站上。其中三个采访是与我和与迈克尔共同撰写的transmittance,下面提供了标题:#1。关于天文学和天体测量的采访,直到1980年。#2.关于1980年后天体测量学复兴的采访。#3. 1990年后的亿万星天体测量。第三次面试开始于1990年,当时我对依巴谷的继任者有了最初的想法。1992年,我在一个名为Roemer的卫星方案中,对CCD探测器直接成像进行了详细设计。1993年,一个据说更好的选择被提出,缩写为GAIA,其中大写的“I”代表干涉仪。然而,在1998年,干涉测量被证明不适合于该目的,我们回到了1992年的原始想法,以进一步发展。这个名字后来被改为盖亚-为了连续性。
Radiative hydrodynamics simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements