Nobeyama 45 m CO J = 1 - 0在z≈0.3处发光型AGNs的观测

IF 2.2 4区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Publications of the Astronomical Society of Japan Pub Date : 2023-06-01 DOI:10.1093/pasj/psad039
T. Michiyama, Ming-Yang Zhuang, J. Shangguan, Hassen M. Yesuf, H. Kaneko, L. Ho
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引用次数: 0

摘要

利用Nobeyama 45 m射电望远镜对10个拥有发光(Lbol > 1046 erg s−1)1型活动星系核(agn)的星系进行了CO J = 1 - 0观测。之所以选择这些目标,是因为根据它们的高星云尘埃消光(AV),预计它们含有丰富的分子气体。然而,在任何目标中都没有检测到显著的CO排放线。根据从星云中推断出的分子气体质量,CO J = 1-0的光度上限低于预期。这种不一致可能是由于缺乏恒星吸收校正而高估了AV值。考虑到更可靠的AV值,Nobeyama 45 m的CO J = 1-0未检测是自然的。这表明我们的结果与文献中提出的从AV到分子气体质量的转换方法并不矛盾。这项调查表明,仍然需要仔细的AV测量和CO观测来改进对拥有发光agn的星系分子气体含量的测量或估计。
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Nobeyama 45 m CO J = 1–0 observations of luminous type 1 AGNs at z ≈ 0.3
We have performed CO J = 1–0 observations of 10 galaxies hosting luminous (Lbol > 1046 erg s−1) type 1 active galactic nuclei (AGNs) with the Nobeyama 45 m radio telescope. The targets are selected because they are expected to be rich in molecular gas based on their high nebular dust extinction (AV). However, no significant CO emission lines were detected in any of the targets. The upper limits of the CO J = 1–0 luminosities are lower than expected given the molecular gas mass inferred from the nebular AV. This inconsistency may be due to overestimated AV values due to the lack of stellar absorption correction. Considering more reliable AV values, the CO J = 1–0 non-detections by Nobeyama 45 m are natural. This suggests that our results do not contradict the conversion methods from AV to molecular gas mass proposed in the literature. This survey suggests that careful AV measurements as well as CO observations are still needed to improve the measurements or estimates of the molecular gas content of galaxies hosting luminous AGNs.
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来源期刊
Publications of the Astronomical Society of Japan
Publications of the Astronomical Society of Japan 地学天文-天文与天体物理
CiteScore
4.10
自引率
13.00%
发文量
98
审稿时长
4-8 weeks
期刊介绍: Publications of the Astronomical Society of Japan (PASJ) publishes the results of original research in all aspects of astronomy, astrophysics, and fields closely related to them.
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