氰乙炔1.5 μm波段作为天体化学光谱目标

IF 4.6 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-04-06 DOI:10.1021/acs.jpclett.5c00724

Thomas Howard, Sanjana Maheshwari, Grace J. Yeh, Shannon E. Ganley, Leah G. Dodson

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引用次数: 0

摘要

随着詹姆斯·韦伯太空望远镜的发射，对益生元分子的探索正式进入了一个新时代。机载近红外仪器的能力提供了比以往任何天基仪器更高的灵敏度和分辨率。随着计划在2025年发射更多近红外望远镜（如SPHEREx），掌握重要分子的实验室数据来指导该光谱区域的观测是至关重要的。本文首次发表了1.5 μm区域的益生元氰乙炔（HC3N）分子链表。通过使用低温缓冲气体冷却将分子冷却到20 K，产生2ν1波段的高分辨反振动状态，并使用腔衰荡光谱进行探测和分配。利用PGOPHER计算了旋转常数，并测量了相对于氰化氢的谱线强度。我们推荐HC3N 1.5 μm波段作为Hycean和Super-Earth系外行星体透射光谱的观测目标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The 1.5 μm Band of Cyanoacetylene as a Spectroscopic Target in Astrochemistry

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The 1.5 μm Band of Cyanoacetylene as a Spectroscopic Target in Astrochemistry

The search for prebiotic molecules officially entered a new era with the launch of the James Webb Space Telescope. The capabilities of the near-infrared instrumentation on board offer greater sensitivity and resolution than have ever been available in a space-based instrument. With the planned launch of more near-infrared telescopes, such as SPHEREx in 2025, it is essential to have laboratory data for important molecules on hand to guide observations in this spectral region. We present here the first published line list of the prebiotic cyanoacetylene (HC₃N) molecule in the 1.5 μm region. Molecules were cooled to 20 K through the use of cryogenic buffer-gas cooling yielding well-resolved ro-vibrational states of the 2ν₁ band that were probed and assigned using cavity-ringdown spectroscopy. Rotational constants were calculated using PGOPHER, and spectral line intensities were measured relative to hydrogen cyanide. We recommend the HC₃N 1.5 μm band as an observational target for transmission spectroscopy at Hycean and Super-Earth exoplanetary bodies.

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.