“星系中的常见发射线”的版本间差异

来自Shiyin's note
跳到导航 跳到搜索
无编辑摘要
第7行: 第7行:
:trace regions of active star formation and is the main coolant of the cold, neutral atomic medium.[http://arxiv.org/abs/1504.05216]
:trace regions of active star formation and is the main coolant of the cold, neutral atomic medium.[http://arxiv.org/abs/1504.05216]
* 发射线的线比可以区分不同的电离机制,金属丰度 [[BPT diagram]],详细的工作可参见[http://arxiv.org/abs/1606.04667]
* 发射线的线比可以区分不同的电离机制,金属丰度 [[BPT diagram]],详细的工作可参见[http://arxiv.org/abs/1606.04667]
*[NII]/[OII]: . intermediate mass stars are the main source of nitrogen en- richment in massive galaxies (Moll´a et al. 2015), the gas from
*[NII]/[OII]: . intermediate mass stars are the main source of nitrogen en- richment in massive galaxies (Moll´a et al. 2015), the gas from their stellar winds should be, on average, extremely nitrogen- rich.
their stellar winds should be, on average, extremely nitrogen- rich.


==红外谱线==
==红外谱线==

2018年9月3日 (一) 02:23的版本

光学波段

  • [OII] doublet (3737A)
  • [OIII] (4959A and 5007A)
  • Balmer series (6563A, 4861A, 4340A, 4103A, ...).
  • [NII]6583A
  • [CII] 158$\mu$m fine-structure line
trace regions of active star formation and is the main coolant of the cold, neutral atomic medium.[1]
  • 发射线的线比可以区分不同的电离机制,金属丰度 BPT diagram,详细的工作可参见[2]
  • [NII]/[OII]: . intermediate mass stars are the main source of nitrogen en- richment in massive galaxies (Moll´a et al. 2015), the gas from their stellar winds should be, on average, extremely nitrogen- rich.

红外谱线

  • 精细结构线 [3]
  • The new [OIV]25.9μm/[OIII]88μm vs [NeIII]15.6μm/[NeII]12.8μm diagram is proposed as the best diagnostic to separate: i) AGN activity from any kind of star formation; and ii) low-metallicity dwarf galaxies from starburst galaxies.
  • the ([NeIII]15.6μm + [NeII]12.8μm)/([SIV]10.5μm + [SIII]18.7μm) ratio is proposed as a promising metallicity tracer to be used in obscured objects, where optical lines fail to accurately measure the metallicity.
weak [NII] 205 um: 恒星形成 [4]