Radiative Feedback from Starburst Galaxies

星爆星系的辐射反馈

• 批准号: 0806476
• 负责人: Sally Oey
• 金额: $ 51.24万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0806476&HistoricalAwards=false
• 关键词: Radiative; Feedback; Starburst; Galaxies

Dr Oey will investigate how ultraviolet light from hot young stars, with photon energies high enough to ionize the hydrogen gas in and around galaxies, can escape from the stars' natal region and spread through the galaxy and beyond. She will use the red light of H alpha to map the ionized hydrogen in galaxies undergoing a burst of star formation, and use radiative transfer models to predict how much of the ultraviolet light escapes to intergalactic space. Studying the spectra of ionized gas around single hot stars in very nearby galaxies (the Magellanic Clouds and M33), she will test stellar-atmosphere models that predict how much ultraviolet light each star should supply. With spectroscopic measurements of star-bursting dwarf galaxies that trace emission from several atomic species, she will probe chemical inhomogeneity and ionization in the gas.A woman graduate student and a woman postdoc will take part in the research. Dr Oey is a woman with a strong track record of working with undergraduates, and is involved in undergraduate outreach. At U. Michigan she is the lead organizer for a Theme Semester for the 2009 International Year of Astronomy, which includes special undergraduate classes, a production of Brecht's 'Galileo', distinguished lectures, exhibitions and star parties.

Oey博士将研究来自热恒星的紫外线如何具有足够高的光子能量以使星系中和周围的氢气电离，可以从星星的出生区域逃脱，并通过星系及以后传播。 她将使用H alpha的红光来绘制经过一系列恒星形成的星系中的离子氢，并使用辐射转移模型来预测多少紫外线逃脱到乳层间空间。 在非常附近星系中（麦哲伦云和M33）中，研究单个热星周围的电离气体的光谱，她将测试恒星 - 大气模型，以预测每个恒星应提供多少紫外线。 通过对从几种原子物种进行追踪排放的星形矮星系的光谱测量，她将探测天然气中的化学不均匀性和电离。 Oey博士是一位与本科生合作的女性，并参与了本科课程。 在美国密歇根州，她是2009年国际天文学的主题学期的主要组织者，其中包括特殊的本科课程，布雷希特的“伽利略”，杰出的讲座，展览和明星派对。