Astrophysics at Keele: planets, stars and galaxies.

基尔天体物理学：行星、恒星和星系。

• 批准号: ST/M001040/1
• 负责人: Coel Hellier
• 金额: $ 155.07万
• 依托单位: Keele University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FM001040%2F1
• 关键词: Astrophysics; Keele; planets; stars; galaxies.

In understanding our place in the universe we need to know how many planets there are and how planetary systems form and evolve. The best way of studying planets is to find the ones that pass in front of ("transit") their star. By looking for the tiny dips in a star's light caused by a transiting planet, Keele's WASP-South survey has found more transiting planets than anyone else in the Southern hemisphere, and is using them to answer questions about how planetary systems form. Planets form around young stars, and star and planet formation are intimately connected. Keele will process the data from a very large survey of young stars and clusters of stars, using spectra obtained by ESO's Very Large Telescope, to combine with the unprecedented astrometry soon to be obtained by ESA's Gaia mission. The combination will provide the biggest survey yet of how stars and stellar clusters form and evolve.The two Magellanic Clouds are the two galaxies closest to our own, so close that they interact with our galaxy, providing an excellent opportunity to study how galaxies affect each other, with collisions and mergers thought to be important factors in explaining galaxies today. Keele will exploit the Vista Magellanic Cloud near-infrared survey to map out star formation across entire interacting galaxy systems and study how star formation differs between the Magellanic Clouds and our galaxy.At the cores of galaxies, supermassive black holes can grow by sucking in material from their surroundings. It is now realised that powerful winds generated by the swirling around a black hole can both regulate the growth of the black hole and affect the future evolution of the whole galaxy. A Keele-led program using the latest X-ray satellites studies the X-ray emission generated by the extreme gravity of the black hole to map out the distribution of the spin periods of the black holes, to study how they interact with their host galaxies. In order to understand both stars and planets transiting stars we need to know the relation between the masses and the radii of stars. This is not known accurately enough currently, but we can improve this by using newly discovered eclipsing binary stars to measure both masses and radii and thus map out the mass-radius relation.

为了了解我们在宇宙中的位置，我们需要知道有多少行星以及行星系统如何形成和演化。研究行星的最好方法是找到那些经过（“凌日”）其星星前面的行星。通过寻找凌日行星引起的星星光线的微小下降，基尔的WASP-南调查发现了比南半球任何其他人都多的凌日行星，并利用它们来回答有关行星系统如何形成的问题。行星围绕着年轻的恒星形成，而星星和行星的形成是密切相关的。基尔将利用ESO甚大望远镜获得的光谱，处理来自年轻恒星和星团的大型调查数据，以联合收割机与欧空局盖亚使命即将获得的前所未有的天体测量相结合。这次合并将提供迄今为止关于恒星和恒星团如何形成和演化的最大规模的调查。两个麦哲伦云是距离我们银河系最近的两个星系，非常接近，以至于它们与我们的银河系相互作用，为研究星系如何相互影响提供了绝佳的机会。相互影响，碰撞和合并被认为是解释当今星系的重要因素。基尔将利用Vista麦哲伦云近红外巡天来绘制出整个相互作用的星系系统中星星的形成过程，并研究麦哲伦云和我们银河系中星星形成过程的不同之处。在星系的核心，超大质量黑洞可以通过吸收周围的物质来生长。现在人们意识到，围绕黑洞旋转产生的强风既可以调节黑洞的生长，也可以影响整个星系的未来演化。Keele领导的一个项目使用最新的X射线卫星研究黑洞极端引力产生的X射线发射，以绘制黑洞旋转周期的分布，研究它们如何与宿主星系相互作用。为了了解恒星和行星凌日恒星，我们需要知道恒星的质量和半径之间的关系。目前我们还不能准确地知道这一点，但是我们可以通过使用新发现的食双星来测量质量和半径，从而绘制出质量-半径关系。

项目成果

Characterising TOI-732 b and c: New insights into the M-dwarf radius and density valley

• DOI: 10.1051/0004-6361/202348180
• 发表时间: 2024-02-06
• 期刊: ASTRONOMY & ASTROPHYSICS
• 影响因子: 6.5
• 作者: Bonfanti，A.;Brady，M.;Zingales，T.
• 通讯作者: Zingales，T.

APPLICATION OF A THEORY AND SIMULATION-BASED CONVECTIVE BOUNDARY MIXING MODEL FOR AGB STAR EVOLUTION AND NUCLEOSYNTHESIS

基于理论和仿真的对流边界混合模型在AGB恒星演化和核合成中的应用

• DOI: 10.3847/0004-637x/827/1/30
• 发表时间: 2016
• 期刊: The Astrophysical Journal
• 作者: Battino U

Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS

利用 CHEOPS 检测 WASP-103b 3 s 时的潮汐变形

• DOI: 10.1051/0004-6361/202142196
• 发表时间: 2022
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Barros S

WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities

• DOI: 10.1051/0004-6361/201526517
• 发表时间: 2016-09-01
• 期刊: ASTRONOMY & ASTROPHYSICS
• 影响因子: 6.5
• 作者: Barros, S. C. C.;Brown, D. J. A.;Wheatley, P. J.
• 通讯作者: Wheatley, P. J.

Detection of the tidal deformation of WASP-103b at $3\,s$ with CHEOPS

使用 CHEOPS 检测 $3,s$ 处 WASP-103b 的潮汐变形

• DOI: 10.48550/arxiv.2201.03328
• 发表时间: 2022
• 作者: Barros S