Maximizing the science return of SITELLE with applications to the evolution of galaxies near and far

通过对近处和远方星系演化的应用，最大化 SITELLE 的科学回报

• 批准号: RGPIN-2014-05008
• 负责人: Drissen, Laurent
• 金额: $ 2.62万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=649602
• 关键词: Maximizing; science; return; SITELLE; applications

Over the past decade, my team has developped, in collaboration with the Québec City-based company ABB, a novel type of imaging spectrometers for visible-light astronomy, Imaging Fourier Transform Spectrometers (iFTS). After having worked on SpIOMM, a prototype IFTS attached to the 1.6-m telescope of the Observatoire du Mont Mégantic, this work will culminate in 2014 with the commissioning of SITELLE as a guest instrument at the Canada-France-Hawaii Telescope; it will be available to the entire CFHT community in the summer of 2014. SITELLE is an iFTS designed to obtain a spectrum for every pixel (0.32'') in a 11' x 11' field of view, in selected bandpasses of the visible band (350 - 900 nm), with a spectral resolution varying between R = 10 and 20 000. This instrument will be used to determine the physical characteristics of comets, nebulae in the Milky Way, nearby galaxies, as well as to characterize the star-formation rate in the more distant Universe.**In this proposal, I present a plan to optimize the science return of SITELLE, and use it to study the process of star formation and chemical evolution in galaxies.I see it as a prime objective of my work in the next five years to make sure that SITELLE is used at its full potential by a large fraction of the CFHT community. Continuous support for SITELLE and its users is of prime importance for the success of this instrument, especially given its non-conventional approach to hyperspectral imagery. Data simulation, acquisition, processing and post-processing softwares are now being developped and tested on SpIOMM and simulated SITELLE data cubes; they will however need to be tested on real SITELLE data, and constantly updated throughout the lifetime of the instrument in order to maximize its scientific output.**I will also use SITELLE for three projects that oriented its design from the beginning and emphasize its full potential:**- The Survey for Nebular Abundances in Galaxies with SITELLE (SNAGS) is mostly aimed at determining the abundance distribution in the disks of several dozen nearby galaxies. I intend to take advantage of SITELLE's high resolution (seeing-limited) to concentrate on evidences of local fluctuations related to the presence of massive stars and their effect on their surrounding ISM, in particular nitrogen enrichement, ionization and kinematics. SITELLE data will be supplemented with long-slit spectra from 8-m class telescopes, archival HST & Galex and UVIT data.**- In collaboration with Iglesias (IAA, Spain) and Plana (LATO - Brazil), I will observe with SpIOMM and SITELLE a sample of low-redshift (z < 0.1) compact groups of galaxies, all of them with clear signs of interactions, in order to understand the phenomena at play in such groups, and in particular star formation in the tidal tails. Measurements of the most conspicuous emission lines will allow us to study the properties (density, metallicity, excitation, kinematics) of the ionized gas, and thus of the young stellar populations not only in the main bodies of the galaxies, but also in the tidal features associated to the interactions thoughout the virial region of the group.**- SITELLE is an ideal instrument to detect, with relatively low biases, very distant star-forming galaxies through their [OII] (up to z ~ 1) or Lya (z ~ 2 - 5) emission. In collaboration with Simard (NRC) and Willis (Uvic) I will use SITELLE to undergo a deep survey for emission-line galaxies in a wide cosmological volume in order to study the star-formation process at different redshifts.

在过去的十年里，我的团队在研究了 IFTS 原型 SpIOMM 后，与魁北克市的 ABB 公司合作开发了一种用于可见光天文学的新型成像光谱仪，即成像傅立叶变换光谱仪 (iFTS)。这项工作附属于 Mont Mégantic 天文台的 1.6 米望远镜，将于 2014 年随着 SITELLE 的投入使用而达到顶峰作为加拿大-法国-夏威夷望远镜的客座仪器；它将在 2014 年夏天向整个 CFHT 社区提供。SITELLE 是一种 iFTS，旨在获取 11' x 中每个像素 (0.32'') 的光谱。 11' 视场，在可见光波段 (350 - 900 nm) 的选定带通中，光谱分辨率在 R = 10 和 20 之间变化000. 该仪器将用于确定彗星、银河系星云、附近星系的物理特征，以及表征更遥远宇宙中的恒星形成率。**在本提案中，我提出了一个计划优化SITELLE的科学回报，并用它来研究星系中恒星形成和化学演化的过程。我将其视为我未来五年工作的首要目标，以确保SITELLE得到充分利用CFHT 社区很大一部分人的潜力。对 SITELLE 及其用户的持续支持对于该仪器的成功至关重要，特别是考虑到其非传统的高光谱图像方法。目前正在 SpIOMM 和模拟 SITELLE 数据立方体上进行开发和测试；但是，它们需要在真实的 SITELLE 数据上进行测试，并在仪器的整个生命周期中不断更新，以最大限度地发挥其科学性**我还将在三个项目中使用 SITELLE，这些项目从一开始就确定了其设计方向并强调其全部潜力：**- 使用 SITELLE (SNAGS) 进行的星系中星云丰度调查主要旨在确定星系中的丰度分布我打算利用 SITELLE 的高分辨率（视见有限）来集中研究与大质量恒星的存在及其对其周围的影响有关的局部波动的证据。 ISM，特别是氮富集、电离和运动学数据将得到 8 米级望远镜的长缝光谱、档案 HST 和 Galex 以及 UVIT 数据的补充。**- 与 Iglesias（西班牙 IAA）和 Plana 合作。 （LATO - 巴西），我将使用 SpIOMM 和 SITELLE 观测低红移 (z < 0.1) 致密星系群的样本，所有这些星系具有清晰的相互作用迹象，以便了解这些群体中起作用的现象，特别是潮汐尾中的恒星形成，对最显着的发射线的测量将使我们能够研究其特性（密度、金属丰度、激发、运动学）。 ）的电离气体，因此年轻的恒星群体不仅在星系的主体中，而且在与整个维里区域相互作用相关的潮汐特征中。**- SITELLE 是与 Simard (NRC) 合作，通过其 [OII]（高达 z ~ 1）或 Lya（z ~ 2 - 5）发射来探测非常遥远的恒星形成星系的理想仪器，偏差相对较低。 Willis (Uvic) 我将使用 SITELLE 对广阔的宇宙体积中的发射线星系进行深入调查，以研究不同红移下的恒星形成过程。