Infrared Detection and Spectroscopy of Embedded Supernovae in Actively Star Forming Galaxies

活跃恒星形成星系中嵌入式超新星的红外探测和光谱学

• 批准号: 0607737
• 负责人: Michael Skrutskie
• 金额: $ 11.22万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607737&HistoricalAwards=false
• 关键词: Infrared; Detection; Spectroscopy; Embedded; Supernovae

AWARD NO: AST-0607737PI: Michael SkrutskieINSTITUTION: University of Virginia Main CampusTITLE: Infrared Detection and Spectroscopy of EmbeddedSupernovae in Actively Star Forming GalaxiesABSTRACTMassive stars are the likely energy sources powering starburst and interacting galaxieswhich therefore should be hosts to frequent supernova events. Yet, contrary toexpectations, surveys for supernovae among such galaxies have established rates whichare comparable to supernovae rates observed in more normal and/or isolated galaxies.However, the bulk of these surveys are also conducted at visible wavelengths whereobscuration by dust associated with star formation and competition from nuclear fluxmay result in observers "missing" supernovae. Here a supernova search program will beimplemented in the near infrared (Ks-band, 2.17 m) where the extinction by dust will besignificantly reduced and the supernovae themselves will be brighter. The survey will becarried out at the University of Virginia's Fan Mountain Observatory using the 31-inchtelescope and HAWAII-1 infrared camera (developed through an NSF Major ResearchInstrumentation grant). Fifty program galaxies, 30 with infrared luminosities in excess of 2x 1010LSun and within 32 Mpc, and 20 of the nearest galaxies more luminous than 1 x1010LSun, will be targeted and observed monthly for supernovae. Detected supernovaewill be fed to the PAIRITEL automated 1.3-meter telescope at Mt. Hopkins, AZ forsimultaneous J-, H-, and Ks-band imaging to determine light curves. Brighter supernovaewill also trigger target-of-opportunity spectroscopic observations with the TripleSpecnear-infrared spectrograph at the Apache Point Observatory 3.5-meter telescope. Theinfrared spectra and light curves will allow the classification of the supernovae as afunction of environment, which will in turn allow the progenitor populations to becharacterized. The overall goals are a better estimate of the local supernovae rate andmore extensive observations of spectroscopic signatures diagnostic of envelope structureand interaction with the surrounding medium.This work will support the training of a graduate student who will be responsible for thepost-commissioning science program with TripleSpec using data from the imagingsurvey which the student will also lead. This student will be deeply integrated into thefinal assembly and testing of TripleSpec and its commissioning at the telescope.Undergraduates from the University of Virginia will take part in the acquisition of data atthe Fan Mountain Observatory with hope of cultivating new instrumentalists in additionto astronomical observers.

奖项编号：AST-0607737PI：Michael Skrutskie 机构：弗吉尼亚大学主校区 标题：活跃恒星形成星系中嵌入式超新星的红外探测和光谱学 摘要 大质量恒星是星暴和相互作用星系的可能能源，因此应该成为频繁超新星事件的宿主。然而，与预期相反，对此类星系中超新星的调查已经建立了与在更正常和/或孤立的星系中观察到的超新星发生率相当的速率。然而，这些调查的大部分也是在可见光波长下进行的，其中与恒星形成和相关的尘埃遮蔽了核通量的竞争可能会导致观测者“错过”超新星。这里将在近红外（Ks波段，2.17 m）实施超新星搜索计划，其中尘埃的消光将显着减少，超新星本身将变得更亮。该调查将在弗吉尼亚大学范山天文台使用 31 英寸望远镜和 HAWAII-1 红外相机（通过 NSF 主要研究仪器资助开发）进行。每月将针对超新星进行瞄准和观测，其中 50 个计划星系，其中 30 个的红外光度超过 2x 1010LSun 且在 32 Mpc 以内，以及最近的 20 个星系的光度超过 1 x1010LSun。检测到的超新星将被传送到位于亚利桑那州霍普金斯山的 PAIRITEL 自动 1.3 米望远镜，用于同时进行 J、H 和 Ks 波段成像，以确定光变曲线。更亮的超新星还将触发阿帕奇点天文台 3.5 米望远镜的 TripleSpec 近红外光谱仪进行目标机会光谱观测。红外光谱和光变曲线将允许根据环境对超新星进行分类，这反过来又将允许对祖细胞群进行表征。总体目标是更好地估计当地超新星发生率，以及更广泛地观察包络结构和与周围介质相互作用的光谱特征诊断。这项工作将支持培训一名研究生，该研究生将负责 TripleSpec 的调试后科学项目使用学生也将领导的成像调查的数据。该学生将深入参与TripleSpec的最终组装、测试以及望远镜调试。弗吉尼亚大学的本科生将参与范山天文台的数据采集，希望在天文观测者之外培养新的仪器师。