标题： 早期宇宙中存在磁场时的氢复合 显示英文标题

标题： Hydrogen recombination in the early Universe in the presence of a magnetic field

摘要： 研究了早期宇宙中存在磁场时的氢复合问题。导出了存在磁场情况下复合温度的方程。考虑了弱场和强场的极限情况。证明了存在一个临界磁场强度，当磁场超过该值时，系统在所有温度下都处于原子氢相态。估计了存在磁场时复合温度的相对偏移，并表明这种偏移很小。 显示英文摘要

摘要： Hydrogen recombination in the early Universe in the presence of a magnetic field is studied. An equation for the temperature of recombination in the presence of a magnetic field is derived. Limiting cases of weak and strong fields are considered. It is demonstrated that there exists a critical magnetic field, above which the system stays in the phase of atomic hydrogen for all temperatures. The relative shift of the temperature of recombination in the presence of a magnetic field is estimated and it is demonstrated that this shift is small.