2006年蛇夫座RS喷发的斯皮策和地基红外观测
Spitzer and ground-based infrared observations of the 2006 eruption of RS Ophiuchi
摘要:
我们提出了斯皮策太空望远镜和补充地面红外观测的周期性新星RS蛇夫座,在64-111天期间获得的2006年爆发后。斯皮策IRS的数据显示了一个丰富的发射线光谱叠加在一个自由的连续。精细结构和日冕红外线的存在导致我们推断,至少有两个温度(1.5e5K和9 e5 K)的喷出物/风环境,并在“冷却器”区域的电子密度为2.2e5厘米-3。元素丰度的测定并不简单,但假设Ne和O的精细结构线出现在相同体积的喷出物中,O/Ne比值按数量计>~0.6。
英文摘要:
We present Spitzer Space Telescope and complementary ground-based infrared observations of the recurrent nova RS Ophiuchi, obtained over the period 64-111 days after the 2006 eruption. The Spitzer IRS data show a rich emission line spectrum superimposed on a free-free continuum. The presence of fine structure and coronal infrared lines lead us to deduce that there are at least two temperatures (1.5e5K and 9e5K) in the ejecta/wind environment, and that the electron density in the `cooler' region is 2.2e5 cm-3. The determination of elemental abundances is not straightforward but on the assumption that the Ne and O fine structure lines arise in the same volume of the ejecta, the O/Ne ratio is >~0.6 by number.
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