在彗星C/1995 O1 (海尔波普) 中的:检测到DCN
R Meier1, T C Owen, D C Jewitt
1University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA. meier@uhifa.ifa.hawaii.edu
概括
在黑尔-波普彗星中检测到化 (DCN),显示出高与 (D/H) 的比率. 这一发现支持彗星冰的星际起源,并暗示了早期太阳系形成温度.
科学领域:
- * 天体化学 * 天体化学
- * 彗星科学是一门学科.
- * 同位素分析.
背景情况:
- *彗星是太阳系早期的残余物,保留了原始材料.
- *同位素比,特别是/ (D/H),为太阳系天体的起源和演变提供了洞察力.
- *以前的研究表明彗星中的D/H比率各不相同,这促使进一步调查.
研究的目的:
- * 在彗星C/1995 O1 (Hale-Bopp) 中检测化 (DCN).
- * 为了确定彗星内部的化 (HCN) 中的/ (D/H) 比率.
- * 将HCN中的D/H比率与彗星水中的D/H比率进行比较,以推断起源.
主要方法:
- *使用詹姆斯·克莱克·麦克斯韦尔望远镜进行观测.
- * 在海尔-波普彗星中检测到脱化化物 (DCN).
- * 计算了化 (HCN) 中的D/H比.
主要成果:
- * 化 (DCN) 在海尔-波普彗星中成功检测到.
- * 在化 (HCN) 中推断的D/H比为 (2.3 +/- 0.4) x 10(-3).
- * HCN中的D/H比率明显高于彗星水中发现的D/H比率.
结论:
- * HCN中高的D/H比率支持彗星冰的星际起源.
- * 在水和HCN中观察到的D/H比值表明,在前恒星星际云碎片中,运动温度至少为30 +/- 10K.
- *这项研究有助于了解早期太阳系的条件及其组成部分的起源.
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