NON-DETECTION OF MAGNETIC FIELDS IN THE CENTRAL STARS OF THE PLANETARY NEBULAE NGC 1360 AND LSS 1362
NON-DETECTION OF MAGNETIC FIELDS IN THE CENTRAL STARS OF THE PLANETARY NEBULAE NGC 1360 AND LSS 1362
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未探测到行星状星云 NGC 1360 和 LSS 1362 中心恒星的磁场
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
R. M. Sainz
中科院分区：
文献类型：
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作者：
F. Leone;M. M. Martínez González;R. Corradi;Giovanni Privitera;R. M. Sainz
磁场的存在是塑造行星状星云（PNe）的一个有吸引力的假设。我们报告的两个PNe NGC 1360和LSS 1326的中央星星的观测。我们在欧洲南方天文台的甚大望远镜上用缩焦器和低色散摄谱仪对圆偏振光进行了光谱学研究。与以前的报告相反，我们发现，有效磁场，这是在可见的恒星盘的磁场的纵向分量的平均值，是零误差范围内的两颗星。我们的结论是，PNe中心恒星磁场的直接证据仍然缺失-磁场比以前报道的要弱得多（<600 G），或者更复杂（从而导致取消），或者两者兼而有之。当然，间接证据（例如，MASER发射）充分证明了进一步努力指出这种磁场的强度和形态。
The presence of magnetic fields is an attractive hypothesis for shaping planetary nebulae (PNe). We report on observations of the central star of the two PNe NGC 1360 and LSS 1326. We performed spectroscopy on circularly polarized light with the Focal Reducer and Low Dispersion Spectrograph at the Very Large Telescope of the European Southern Observatory. Contrary to previous reports, we find that the effective magnetic field, which is the average over the visible stellar disk of longitudinal components of the magnetic fields, is null within errors for both stars. We conclude that direct evidence of magnetic fields on the central stars of PNe is still missing—either the magnetic field is much weaker (<600 G) than previously reported, or more complex (thus leading to cancellations), or both. Certainly, indirect evidence (e.g., MASER emission) fully justify further efforts to point out the strength and morphology of such magnetic fields.