.. _effective_optical_depth_HeII_Lya:

HeII Ly-alpha effective optical depth
=====================================

**Field names**: 
"effective_optical_depth_HeII_Lya", "tau_HeII", "tau_eff_HeII"

**Units**: 


**Remarks**: 


**Required fields**: 
"redshift"


    
Data
^^^^

.. image:: ../plots/effective_optical_depth_HeII_Lya.png
   :height: 200pt

**Data sources**

|Makan et al. 2021|

.. |Makan et al. 2021| raw:: html

   <a href="https://ui.adsabs.harvard.edu/abs/2021ApJ...912...38M/abstract" target="_blank">Makan et al. 2021</a>

|Makan et al. 2022|

.. |Makan et al. 2022| raw:: html

   <a href="https://ui.adsabs.harvard.edu/abs/2022ApJ...927..175M/abstract" target="_blank">Makan et al. 2022</a>

|Worseck et al. 2016|

.. |Worseck et al. 2016| raw:: html

   <a href="https://iopscience.iop.org/article/10.3847/0004-637X/825/2/144" target="_blank">Worseck et al. 2016</a>

|Worseck et al. 2019|

.. |Worseck et al. 2019| raw:: html

   <a href="https://iopscience.iop.org/article/10.3847/1538-4357/ab0fa1" target="_blank">Worseck et al. 2019</a>