• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >EDDINGTON ACCRETION AND QSO EMISSION LINES AT z ～ 2
【24h】

EDDINGTON ACCRETION AND QSO EMISSION LINES AT z ～ 2

机译：z〜2处的爱丁顿吸积和QSO发射线

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Broad absorption line (BAL) QSOs have been suggested to be youthful superaccretors based on their powerful radiatively driven absorbing outflows and often reddened continua. To test this hypothesis, we observed near-IR spectra of the Hβ region for 11 bright BAL QSOs at redshift z ～ 2. We measured these and literature spectra for six BAL QSOs and 13 radio-loud and seven radio-quiet non-BAL QSOs. Using the luminosity and Hβ broad line width to derive black hole mass and accretion rate, we find that both BAL and non-BAL QSOs at z ～ 2 tend to have higher L/L_(Edd) than those at low z? probably a result of selecting the brightest QSOs. However, we find that the high-z QSOs, in particular the BAL QSOs, have extremely strong Fe Ⅱ and very weak [O Ⅲ], extending the inverse relationship found for low-z QSOs. This suggests that, even while radiating near L_(Edd), the BAL QSOs have a more plentiful fuel supply than non-BAL QSOs. Comparison with low-z QSOs shows for the first time that the inverse Fe Ⅱ-[O Ⅲ] relationship is indeed related to L/L_(Edd), rather than black hole mass.
机译：宽吸收线（BAL）QSO已被认为是年轻的超级分泌物，因为它们具有强大的辐射驱动吸收性流出物，并且经常使连续体变红。为了验证这一假设，我们在11的红移z〜2处观察了11个明亮的BAL QSO的Hβ区域的近红外光谱。我们测量了6个BAL QSO和13个放射性高的非BAL QSO的Hβ区和文献光谱。 。利用光度和Hβ宽线宽度得出黑洞质量和吸积率，我们发现z〜2处的BAL和非BAL QSO都比低z处的L / L_（Edd）高。可能是选择最出色的QSO的结果。但是，我们发现高z QSO，特别是BAL QSO具有极强的FeⅡ和非常弱的[OⅢ]，扩展了低z QSO的反比关系。这表明，即使在L_（Edd）附近辐射，BAL QSO也比非BAL QSO拥有更多的燃料供应。与低z QSO的比较首次表明，反铁Ⅱ-[OⅢ]关系确实与L / L_（Edd）有关，而不与黑洞质量有关。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号