Red-enhanced cameras to seek rocky planets transiting Ultra-Cool Dwarfs

红色增强相机寻找凌日超冷矮星的岩石行星

• 批准号: ST/S00193X/1
• 负责人: Amaury Triaud
• 金额: $ 16.13万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FS00193X%2F1
• 关键词: Red; enhanced; cameras; seek; rocky

This project will provide essential instruments to three telescopes. Two of these telescopes will be constructed in Tenerife, Spain as part of the SPECULOOS project, while the third already exists, in Antarctica, and is called ASTEP. Several research themes are possible with these telescopes, but we will use the vast majority of the telescopes' time to observe ultra-cool dwarfs. These are objects with masses less than 15% of the Sun's. Their small size means that it is easier to detect planets as small as the Earth, that orbit them. We aim to detect Earth-size planets as they transit in front of their host star. Doing so they hide a fraction of the stellar surface, which we can detect as a drop in brightness. An example is the renown TRAPPIST-1 system that we detected as part of a pilot project. Around that star, we identified seven temperate planets with properties similar to many our Solar system's planets. TRAPPIST-1 has become the most optimal set of planets for which we initiate the search for evidence of life beyond the Solar system. This project aims to discover more planetary systems like TRAPPIST-1. Detecting a dozen such systems will enhance our understanding of planet formation, and help inform us about where our Earth stands within the many outcomes of Nature. The reason we seek planets orbiting ultra-cool stars, rather than stars like the Sun is because ultra-cool stars, and the planets orbiting them have very advantageous properties. Notably it is easier to study these worlds in detailed manners. Particularly, we will be able to collect data about the chemical composition of their atmosphere using upcoming state-of-the-art facilities. We expect to detect a few dozen Earth-size planets. Atmospheric investigations of these worlds will reveal the types of climates that terrestrial worlds have, showing whether they are similar or different to Earth and Venus. Such data may also provide empirical means of assessing surface habitability. Eventually, it will also be possible to seek chemical evidence that biology is active, and find out how frequently life emerges in the Universe, and under which conditions it does so.Ultra-cool dwarfs are brightest in redder wavelengths, requiring instrumentation that is particularly sensitive to the same redder wavelengths. We have identified and already tested such an instrument, which produced data of a remarkable quality. As we are expanding the number of telescope in our possession, to the Northern hemisphere, we also wish to equip them with the same highly-performant cameras. The goal of this request for funds is to purchase three such cameras. Two will participate in the SPECULOOS project, detecting new Earths orbiting ultra-cool dwarfs within the Solar neighbourhood. The third camera will be mounted on an existing telescope built at one of the highest altitudes of Antarctica, and benefitting from nights lasting months, which is particularly convenient to confirm planetary systems such as those identified with SPECULOOS.

该项目将为三台望远镜提供必要的仪器。其中两个望远镜将建在西班牙特内里费岛，作为斯库卢卢斯项目的一部分，而第三个望远镜已经存在，位于南极洲，被称为ASTEP。这些望远镜可能有几个研究主题，但我们将使用望远镜的绝大多数时间来观察超冷矮星。这些天体的质量不到太阳的15%。它们的小尺寸意味着更容易探测到像地球这样小的行星，这些行星围绕它们运行。我们的目标是探测地球大小的行星在其主恒星前面经过时。这样做，它们隐藏了恒星表面的一小部分，我们可以检测到亮度的下降。一个例子是我们作为试验项目的一部分检测到的著名的Trappist-1系统。在这颗恒星周围，我们发现了七颗温带行星，它们的性质与我们太阳系的许多行星相似。Trappist-1已经成为我们开始寻找太阳系外生命证据的最理想的一组行星。该项目旨在发现更多像Trappist-1这样的行星系统。探测到十几个这样的系统将增强我们对行星形成的理解，并帮助我们了解我们的地球在自然的许多结果中所处的位置。我们之所以寻找围绕超冷恒星运行的行星，而不是像太阳这样的恒星，是因为超冷恒星，而围绕它们运行的行星具有非常有利的性质。值得注意的是，以详细的方式研究这些世界更容易。特别是，我们将能够使用即将到来的最先进的设施收集关于它们大气化学成分的数据。我们预计将探测到几十个地球大小的行星。对这些星球的大气调查将揭示陆地星球的气候类型，表明它们与地球和金星是相似还是不同。这类数据还可提供评估地表宜居性的经验手段。最终，也将有可能寻找生物活跃的化学证据，并找出宇宙中生命出现的频率，以及在什么条件下生命会出现。超冷矮星在更红的波长下最亮，需要对同样的红波长特别敏感的仪器。我们已经确定并测试了这样一种仪器，它产生了高质量的数据。随着我们将我们拥有的望远镜数量扩大到北半球，我们也希望为他们配备同样高性能的相机。这项资金申请的目标是购买三台这样的相机。其中两个将参与斯库卢卢斯项目，探测太阳附近围绕着超冷矮星运行的新地球。第三架相机将安装在现有的望远镜上，该望远镜建在南极洲海拔最高的地方之一，受益于持续数月的夜晚，这对于确认行星系统特别方便，例如那些被确认为镜面的行星系统。

项目成果

Cluster Difference Imaging Photometric Survey. II. TOI 837: A Young Validated Planet in IC 2602

• DOI: 10.3847/1538-3881/abb9ab
• 发表时间: 2020-09
• 期刊: The Astronomical Journal
• 作者: L. Bouma;J. Hartman;R. Brahm;P. Evans;K. Collins;G. Zhou;P. Sarkis;S. Quinn;J. D. Leon

Evidence for transit-timing variations of the 11 Myr exoplanet TOI-1227 b

11 Myr 系外行星 TOI-1227 b 凌日时间变化的证据

• DOI: 10.1051/0004-6361/202348492
• 发表时间: 2024
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Almenara J

TOI-2084 b and TOI-4184 b: Two new sub-Neptunes around M dwarf stars

TOI-2084 b 和 TOI-4184 b：M 矮星周围的两颗新的亚海王星

• DOI: 10.1051/0004-6361/202346838
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Barkaoui K

Three long period transiting giant planets from TESS

TESS 中的三颗长周期凌日巨行星

• DOI: 10.48550/arxiv.2304.02139
• 发表时间: 2023
• 作者: Brahm R

TOI-1231 b: A Temperate, Neptune-sized Planet Transiting the Nearby M3 Dwarf NLTT 24399

• DOI: 10.3847/1538-3881/ac0432
• 发表时间: 2021-05
• 期刊: The Astronomical Journal
• 作者: J. Burt;D. Dragomir;P. Mollière;A. Youngblood;A. G. Muñoz;J. McCann;L. Kreidberg;Chelsea X. Huang-Chelsea