Pulsating pre-MS stars in the young open cluster NGC 2264: V588 Monocerotis and V589 Monocerotis

Pulsating pre-MS stars in the young open cluster NGC 2264: V588 Monocerotis and V589 Monocerotis
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年轻疏散星团 NGC 2264 中的脉动前 MS 恒星:V588 麒麟座和 V589 麒麟座

DOI:
10.1051/0004-6361:20079207
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发表时间:
2008
影响因子:
6.5
通讯作者:
W. Weiss
W. Weiss
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
T. Kallinger;K. Zwintz;W. Weiss

文献摘要

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我们报告了第一个高精度光度多站点活动,以研究年轻疏散星团 NGC 2264 方向上的两颗首次检测到的脉动前主序星 V588 Mon 和 V589 Mon。我们从 2002 年 11 月到 2003 年 2 月进行了这项活动,在四个天文台进行了约 216 小时的光度覆盖。详细的频率分析产生了密集的特征谱,典型的 6 Scuti 型脉动,在 V588 Mon 和 V589 Mon 数据中分别有 16 和 20 个显着频率。利用 Strogrem uvbyβ 光度测量和光谱观测以及已发表的日内瓦和红外光度测量,我们推导出了可行的基本参数,将两颗恒星置于 6 Scuti 不稳定带中,并提供了强有力的证据,证明两颗恒星都是 NGC 2264 的成员,并且确实处于其前主序演化阶段。
We report on the first high-accuracy, photometric multisite campaign to study the two, first-detected pulsating, pre-main sequence stars V588 Mon and V589 Mon in the direction of the young open cluster NGC 2264. We carried out the campaign from November 2002 to February 2003 with a photometric coverage of about 216 h at four observatories. A detailed frequency analysis results in well-populated eigenspectra, typical for 6 Scuti type pulsation, with 16 and 20 significant frequencies in the V588 Mon and V589 Mon data, respectively. Using Strogrem uvbyβ photometry and spectroscopic observations as well as published Geneva and infrared photometry feasible fundamental parameters we deduced, placing both stars in the 6 Scuti instability strip and giving strong evidence that both stars are members of NGC 2264 and are indeed in their pre-main sequence phase of evolution.