Emission line haloes in quasars: The smoking gun of quasar feedback?

类星体中的发射线晕：类星体反馈的确凿证据？

• 批准号: 42000560
• 负责人: Professor Dr. Lutz Wisotzki
• 金额: --
• 依托单位: Leibniz-Institut für Astrophysik Potsdam (AIP)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/42000560?language=en
• 关键词: Emission; line; haloes; quasars; smoking

Quasars are often surrounded by extended gaseous material, ionized by the nuclear UV continuum and radiating in several distinct emission lines. This gaseous material may be related to large-scale outflows or 'feedback' from the active galactic nucleus into the host galaxy and its environment. We request the continuation of an observational study of such extended emission line regions around quasars. Our chosen approach is to perform optical integral field spectrocopy, which provides maps, velocity fields and emission line ratios at once. We have been very successful accumulating new observational data on the topic, and we present first results from a variety of instruments and samples, with particular emphasis on low-redshift quasars and Seyfert galaxies. Several of our targets show evidence for extended emission that can be related to outflows. We want to combine all our data into a comprehensive investigation of the phenomenon. We also want to address similar issues regarding the presence and properties of extended Ly emission around QSOs at high redshifts, focussing on a comparison between radio-loud and radio-quiet quasars.

类星体通常被扩展的气体物质包围，被核紫外连续光谱电离，并以几条不同的发射线辐射。这种气态物质可能与活动星系核向宿主星系及其环境的大规模外流或“反馈”有关。我们要求继续对类星体周围的这种扩展发射线区域进行观测研究。我们选择的方法是进行光学积分场光谱，它提供地图，速度场和发射线比一次。我们已经非常成功地积累了新的观测数据的主题，我们目前的第一个结果，从各种仪器和样品，特别强调低红移类星体和塞弗特星系。我们的几个目标显示了与外流有关的延长排放的证据。我们想把我们所有的数据联合收割机综合起来，对这一现象进行一次全面的调查。我们还想解决类似的问题，在高红移的类星体周围的扩展Ly发射的存在和属性，集中在无线电大声和无线电安静类星体之间的比较。

项目成果

Mapping the ionised gas around the luminous QSO HE 1029-1401: evidence for minor merger events?

绘制发光 QSO HE 1029-1401 周围的电离气体图：小型合并事件的证据？

• DOI: 10.1051/0004-6361/201014559
• 发表时间: 2010
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Husemann;Sánchez;Wisotzki
• 通讯作者: Wisotzki

The low-metallicity QSO HE 2158 − 0107: a massive galaxy growing by accretion of nearly pristine gas from its environment?

• DOI: 10.1051/0004-6361/201117596
• 发表时间: 2011-09
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: B. Husemann;L. Wisotzki;K. Jahnke;S. A. I. Potsdam;M. F. Astronomie;Centro Astron'omico Hispano Alem'an de Calar Alto

Extended emission-line regions in low-redshift quasars - Dependence on nuclear spectral properties

• DOI: 10.1051/0004-6361:200810276
• 发表时间: 2008-07
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: B. Husemann;L. Wisotzki;S. Sánchez;K. Jahnke