搜索结果: 1-11 共查到“恒星与银河系 Kepler”相关记录11条 . 查询时间(0 秒)
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基于Kepler数据的A型星耀发研究取得进展(图)
Kepler数据 A型星耀发 恒星耀发
2021/2/4
按照恒星演化标准理论,正常的A型星没有表面对流层,预期没有磁场活动,所以应该没有恒星耀发现象,近几年Kepler和TESS空间望远镜都探测到A型星耀发,现有恒星理论无法给与解释。新疆天文台光学团组科研人员通过搜寻和分析Kepler卫星数据库中有效温度从7000-10500K的5435颗恒星长曝光数据,发现17颗新的A型耀发恒星,使得有耀发现象的A型星数量增加到154颗,该类恒星样本数增加了12%。...
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近期,贵州大学张立云教授团队、国家天文台施建荣研究员、美国巴特勒大学韩先明教授和云南大学王海峰博士后等合作利用LAMOST中分辨率时序光谱和Kepler测光数据,对恒星的磁活动进行了系统研究,确定了它们的色球活动强度和演化情况。在银河系中存在大量变星,变星是指亮度与电磁辐射不稳定,经常变化并且伴随着其他物理变化的恒星,如类太阳恒星、天琴座变星等。天文学家通常利用国内外的测光数据和光谱数据,确定恒星...
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LAMOST-Kepler项目五年巡天观测星表发布(图)
LAMOST-Kepler项目 巡天观测星表
2018/10/24
开普勒(Kepler)空间望远镜是美国宇航局于2009年5月发射的高精度连续测光卫星,旨在通过行星凌日的方法探测类地行星,同时也为恒星物理的研究提供了史无前例的高精度测光数据。利用其对首要观测天区(天鹅座与天琴座之间105平方度天区)为期四年的观测数据,世界各国天文学家在系外行星科学和恒星物理学研究等方面取得了一系列进展,发表了超过1000篇重要科学文献,包括Nature和Science期刊文章2...
第二届LAMOST-Kepler国际研讨会会议通知
第二届 LAMOST-Kepler 国际研讨会 会议通知 恒星光谱观测
2017/4/6
美国开普勒(Kepler)空间望远镜通过连续监测天鹅座-天琴座的一个天区,获得了其视场内大量恒星前所未有的超高精度、高连续性光变曲线,在系外行星搜寻和利用星震学方法研究恒星方面取得了革命性的突破。虽然系统的光度巡天监测使得覆盖整个赫-罗图的恒星星震研究首次成为可能,但原有的开普勒输入星表只提供低精度的恒星有效温度、表面重力加速度和金属丰度值并缺乏恒星化学组分和自转速度信息,妨碍了星震学模型的构建。...
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恒星表面重力(logg)是恒星物理学中的一个重要参数,但是相对于恒星的其他基本参数,例如有效温度、金属丰度而言,目前基于中低分辨率的光谱数据得到的logg精度还有待提高。开普勒(Kepler)卫星项目在运行期间获得了固定天区中一大批恒星的精确星震学参数。
Dynamical Tides in Eccentric Binaries and Tidally-Excited Stellar Pulsations in KEPLER KOI-54
binaries: close|stars: oscillations|stars: rotation|stars: individual: HD187091 (KOI-54)
2011/10/13
Recent observation of the tidally-excited stellar oscillations in the main-sequence binary KOI-54 by the KEPLER satellite provides a unique opportunity for studying dynamical tides in eccentric binary...
The Kepler characterization of the variability among A- and F-type stars. I. General overview
Asteroseismology - Stars: oscillations - Stars: variables: δ Scuti - Stars: fundamental parameters - binaries: general - Stars: statistics
2011/9/27
The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds of A-F type stars. We present a first general characterization of the pulsational behaviou...
On the Detection of (Habitable) Super-Earths Around Low-Mass Stars Using Kepler and Transit Timing Variation Method
Planetary Systems
2011/10/9
We present the results of an extensive study of the detectability of Earth-sized planets and super-Earths in the habitable zones of cool and low-mass stars using transit timing variation method. We ha...
The First Kepler Mission Planet Confirmed With The Hobby-Eberly Telescope: Kepler-15b, a Hot Jupiter Enriched In Heavy Elements
Hot Jupiter Enriched Heavy Elements Planet Confirmed
2011/10/9
We report the discovery of Kepler-15b, a new transiting exoplanet detected by NASA's Kepler mission. The transit signal with a period of 4.94 days was detected in the quarter 1 (Q1) Kepler photometry....
An asteroseismic membership study of the red giants in three open clusters observed by Kepler: NGC6791, NGC6819, and NGC6811
asteroseismic membership study red giants clusters observed Kepler
2011/9/29
Studying star clusters offers significant advances in stellar astrophysics due to the combined power of having many stars with essentially the same distance, age, and initial composition. This makes c...
Amplitudes of solar-like oscillations: constraints from red giants in open clusters observed by Kepler
Amplitudes solar-like oscillations: constraints clusters observed Kepler
2011/9/27
Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsation. The common notion t...