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BALMER DISCONTINUITY TEMPERATURES IN THE ORION NEBULA

机译:猎户座星云中的巴尔默不连续温度

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摘要

We have mapped the Balmer discontinuity temperature T_e(BJ) along two long-slit positions in the Orion Nebula, using high-quality spectra obtained with the ESO 1.52 m telescope and with the 3.9 m AAT. One slit was oriented north-south and positioned 40″ west of θ~1 C Ori. The second slit was oriented east-west, with its eastern end 10″ west of θ~1 C Ori, identical to the slit position previously studied by Walter & Dufour (1994). For the NS slit, both the 1.52 m and the AAT data yield a constant temperature of about 9000 K, with variations of only a few hundred K over a total slit length of about 3.5′. For the EW-slit, our data reveal two distinct regions of nearly constant temperatures of 8900 and 7200 K, respectively, possibly resulting from two separate H II regions. No evidence is found for the anomalously low temperatures reported by Walter and Dufour for the same region.
机译:我们使用在ESO 1.52 m望远镜和3.9 m AAT上获得的高质量光谱,沿着猎户座星云中的两个长缝位置绘制了巴尔默不连续温度T_e(BJ)。一个狭缝朝向南北,位于θ〜1 C Ori以西40英寸。第二个狭缝朝向东西方向,其东端在θ〜1 C Ori以西10“,与Walter&Dufour(1994)先前研究的狭缝位置相同。对于NS缝,1.52 m和AAT数据均产生约9000 K的恒定温度,在约3.5'的总缝长度上仅有几百K的变化。对于EW狭缝,我们的数据揭示了两个不同的区域,分别接近8900和7200 K的恒定温度,这可能是由两个单独的H II区域引起的。没有证据表明Walter和Dufour报告了同一地区的异常低温。

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