scholarly journals Ionization Fronts for H II Regions with Magnetic Fields.

1966 ◽  
Vol 71 ◽  
pp. 167
Author(s):  
Barry M. Lasker
Keyword(s):  
Magnetic Fields ◽  
H Ii Regions ◽  
Ionization Fronts

scholarly journals DENSER SAMPLING OF THE ROSETTE NEBULA WITH FARADAY ROTATION MEASUREMENTS: IMPROVED ESTIMATES OF MAGNETIC FIELDS IN H ii REGIONS

2016 ◽  
Vol 821 (2) ◽  
pp. 92 ◽  
Author(s):  
Allison H. Costa ◽  
Steven R. Spangler ◽  
Joseph R. Sink ◽  
Shea Brown ◽  
Sui Ann Mao
Keyword(s):  
Magnetic Fields ◽  
Faraday Rotation ◽  
H Ii Regions ◽  
Rosette Nebula

scholarly journals Magnetogenesis around the first galaxies: the impact of different field seeding processes on galaxy formation

2021 ◽  
Author(s):  
Enrico Garaldi ◽  
Rüdiger Pakmor ◽  
Volker Springel
Keyword(s):  
Magnetic Fields ◽  
Galaxy Formation ◽  
Ad Hoc ◽  
High Redshift ◽  
Ionization Fronts ◽  
Seed Field ◽  
Biermann Battery ◽  
First Galaxies ◽  
High Redshift Universe ◽  
The Impact

Abstract We study the evolution of magnetic fields generated by charge segregation ahead of ionization fronts during the Epoch of Reionization, and their effects on galaxy formation. We compare this magnetic seeding process with the Biermann battery, injection from supernovae, and an imposed seed field at redshift z ≳ 127. Using a suite of self-consistent cosmological and zoom-in simulations based on the Auriga galaxy-formation model, we determine that all mechanisms produce galactic magnetic fields that equally affect galaxy formation, and are nearly indistinguishable at z ≲ 1.5. The former is compatible with observed values, while the latter is correlated with the gas metallicity below a seed-dependent redshift. Low-density gas and haloes below a seed-dependent mass threshold retain memory of the initial magnetic field. We produce synthetic Faraday rotation measure maps, showing that they have the potential to constrain the seeding process, although current observations are not yet sensitive enough. Our results imply that the ad-hoc assumption of a primordial seed field – widely used in galaxy formation simulations but of uncertain physical origin – can be replaced by physically-motivated mechanisms for magnetogenesis with negligible impact on galactic properties. Additionally, magnetic fields generated ahead of ionization fronts appear very similar but weaker than those produced by the Biermann battery. Hence, in a realistic scenario where both mechanisms are active, the former will be negligible compared to the latter. Finally, our results highlight that the high-redshift Universe is a fruitful testing ground for our understanding of magnetic fields generation.

scholarly journals Magnetic Fields and Star Formation around H II Regions: The S235 Complex

2021 ◽  
Vol 911 (2) ◽  
pp. 81
Author(s):  
R. Devaraj ◽  
D. P. Clemens ◽  
L. K. Dewangan ◽  
A. Luna ◽  
T. P. Ray ◽  
...  
Keyword(s):  
Star Formation ◽  
Magnetic Fields ◽  
H Ii Regions

scholarly journals INSTABILITY OF MAGNETIZED IONIZATION FRONTS SURROUNDING H II REGIONS

2014 ◽  
Vol 797 (2) ◽  
pp. 135 ◽  
Author(s):  
Jeong-Gyu Kim ◽  
Woong-Tae Kim
Keyword(s):  
H Ii Regions ◽  
Ionization Fronts

scholarly journals Unveiling the Importance of Magnetic Fields in the Evolution of Dense Clumps Formed at the Waist of Bipolar H ii Regions: A Case Study of Sh 2-201 with JCMT SCUBA-2/POL-2

2020 ◽  
Vol 897 (1) ◽  
pp. 90
Author(s):  
Chakali Eswaraiah ◽  
Di Li ◽  
Manash R. Samal ◽  
Jia-Wei Wang ◽  
Yuehui Ma ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
H Ii Regions
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