Close-up of primary and secondary asteroseismic CoRoT targets and the ground-based follow-up observations
K. Uytterhoeven, E. Poretti, M. Rainer, L. Mantegazza, W. Zima, C. Aerts, T. Morel, A. Miglio, K. Lefever, P. J. Amado, S. Martin-Ruiz, P. Mathias, J. C. Valtie… 展开作者
K. Uytterhoeven, E. Poretti, M. Rainer, L. Mantegazza, W. Zima, C. Aerts, T. Morel, A. Miglio, K. Lefever, P. J. Amado, S. Martin-Ruiz, P. Mathias, J. C. Valtier, M. Paparo, J. M. Benko, the CoRoT/SWG
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7 pages, 6 figures, HELAS II International Conference "Helioseismology, Asteroseismology and MHD Connections", 2008, J.Phys.: Conf. Ser. 118, 012077
To optimise the science results of the asteroseismic part of the CoRoT satellite mission a complementary simultaneous ground-based observational campaign is organised for selected CoRoT targets. The observations include both high-resolution spectroscopic and multi-colour photometric data. We present the preliminary results of the analysis of the ground-based observations of three targets. A line-profile analysis of 216 high-resolution FEROS spectra of the delta Sct star HD 50844 reveals more than ten pulsation frequencies in the frequency range 5-18 c/d, including possibly one radial fundamental mode (6.92 c/d). Based on more than 600 multi-colour photometric datapoints of the beta Cep star HD180642, spanning about three years and obtained with different telescopes and different instruments, we confirm the presence of a dominant radial mode nu1=5.48695 c/d, and detect also its first two harmonics. We find evidence for a second mode nu2=0.3017 c/d, possibly a g-mode, and indications for two more frequencies in the 7-8 c/d domain. From Stromgren photometry we find evidence for the hybrid delta Sct/gamma Dor character of the F0 star HD 44195, as frequencies near 3 c/d and 21 c/d are detected simultaneously in the different filters.
Preparing the COROT space mission: new variable stars in the galactic Anticenter direction
介绍了与筹备COROT天文地震测光空间飞行任务有关的活动。在不同的天文台和望远镜上获得了光电观测、宽视场CCD测光、uvbyB校准和进一步的时间序列。他们计划在银河系Anticenter方向完成COROT计划。除了涵盖ZAMS和TAMS之间不同演化阶段的合适的星震目标外，我们还发现了其他几颗变星，既有脉动星，也有几何变星。我们比较了在银河系中心和Anticenter方向的变化的发病率的结果。获得了物理参数，并计算了拟合这些参数的演化轨迹。一些个别恒星的特殊性已经指出。根据在圣佩德罗马蒂尔、内华达山脉、泰德、拉西拉、上普罗旺斯和Roque de Los Muchachos（国家伽利略望远镜和墨卡托望远镜）天文台收集的观测资料编写的论文。
CoRoT and asteroseismology. Preparatory work and simultaneous ground-based monitoring
CoRoT（对流、旋转和行星凌日）卫星的成功发射开启了星震学的新时代。空间光度测定得到地面高分辨率光谱学和多色光度测定的补充，以最完整的方式揭示小行星地震目标的脉动内容。这两种类型的数据获得的一些初步结果。本文是根据在S. Pedro Martir、Serra La Nave、La Silla和Telescopio Nazionale Galileo天文台。
