ALMA detection of 321GHz water maser emission in the radio galaxy NGC1052
ALMA detection of 321GHz water maser emission in the radio galaxy NGC1052
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ALMA 探测射电星系 NGC1052 中的 321GHz 水脉泽发射
DOI：
10.1093/pasj/psad011
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发表时间：
2023
影响因子：
2.3
通讯作者：
Humphreys Elizabeth
中科院分区：
文献类型：
--
作者：
Kameno Seiji;Harikane Yuichi;Sawada-Satoh Satoko;Sawada Tsuyoshi;Saito Toshiki;Nakanishi Kouichiro;Humphreys Elizabeth
阿塔卡马大毫米/亚毫米阵列偶然探测到NGC 1052中321千兆赫处的H2O-93，6发射。这是第一次在射电星系中探测到亚毫米脉泽，也是迄今已知的最亮的321千兆赫H2O脉泽，其各向同性光度为。这条谱线由横跨系统速度的宽速度分量和窄速度分量组成，半高宽=2208±12 Km S−1，半高宽=244±3 Km S−1，蓝移160 Km S−1。它与已知的22 GHz 61，6-52，3脉泽明显不同，后者显示红移193 Km S−1。亚毫米脉泽在空间上是不分辨的，与12 PC内的连续核位置重合。这些结果表明，通过堆芯前方高温(>；1000 K)和致密的[n(H2O)>；104 cm−3]分子气体放大了连续谱发射。
The Atacama Large Millimeter/submillimeter Array (ALMA) serendipitously detected H2O–93, 6emission at 321 GHz in NGC 1052. This is the first submillimeter maser detection in a radio galaxy and the most luminous 321 GHz H2O maser known to-date with the isotropic luminosity of. The line profile consists of a broad velocity component with FWHM = 208 ± 12 km s−1straddling the systemic velocity and a narrow component with FWHM = 44 ± 3 km s−1blueshifted by 160 km s−1. The profile is significantly different from the known 22 GHz 61, 6–52, 3maser which shows a broad profile redshifted by 193 km s−1. The submillimeter maser is spatially unresolved with a synthesized beam ofand coincides with the continuum core position within 12 pc. These results indicate amplification of the continuum emission through high-temperature (>1000 K) and dense [n(H2O) > 104cm−3] molecular gas in front of the core.