THE TRANSIENT MOLECULAR ENVELOPE IN THE OUTFLOW OF THE NOVA V2676 Oph DURING ITS EARLY PHASE
THE TRANSIENT MOLECULAR ENVELOPE IN THE OUTFLOW OF THE NOVA V2676 Oph DURING ITS EARLY PHASE
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NOVA V2676 Oph 早期流出中的瞬态分子包膜
DOI：
10.1088/2041-8205/780/2/l26
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Y. Ikeda
中科院分区：
文献类型：
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作者：
M. Nagashima;A. Arai;T. Kajikawa;H. Kawakita;E. Kitao;T. Arasaki;G. Taguchi;Y. Ikeda
新星通常被认为是“热”的天体，在其视觉最大值时显示出10，000 K或更高的有效温度。然而，理论预测表明，新星外流的外壳可以变得足够冷，以形成在如此高温下解离的分子。我们在新星V2676 Oph的光谱中检测到了强烈的C2和CN吸收带，这是一颗非常缓慢的新星，有尘埃形成。这是在爆发期间在新星中检测到C2的第一份报告，也是第二份检测到CN的报告。虽然，根据以前的研究，这种简单的分子预测形式的信封流出，有很少的报告，他们的检测到目前为止。在V2676 Oph的情况下，分子包膜的存在被认为是非常短暂的，仅持续几天。
Novae are generally considered to be “hot” astronomical objects which show effective temperatures of 10,000 K or higher at their visual maximum. However, theoretical predictions suggest that the outer envelope of the nova outflow can become cool enough to form molecules which would be dissociated at such high temperatures. We detected strong C2 and CN absorption bands in the optical spectrum of the nova V2676 Oph, a very slow nova with dust formation. This is the first report of the detection of C2, and the second of CN, in novae during an outburst. Although, based on previous studies, such simple molecules are predicted form in the envelope of the outflow, there are few reports of their detection thus far. The presence of the molecular envelope is considered to be very transient, with a duration of only a few days, in the case of V2676 Oph.