ALMA detection of 321 GHz water maser emission in the radio galaxy NGC 1052

被引：3

作者：

Kameno, Seiji ^{[1
,2
]}

Harikane, Yuichi ^{[3
]}

Sawada-Satoh, Satoko ^{[4
]}

Sawada, Tsuyoshi ^{[1
,2
]}

Saito, Toshiki ^{[2
]}

Nakanishi, Kouichiro ^{[2
]}

Humphreys, Elizabeth ^{[1
]}

机构：

[1] Joint ALMA Observ, Alonso de Cordova 3107 Vitacura, Santiago 7630355, Chile

[2] Natl Astron Observ Japan, 2-21-1 Osawa,Mitaka Ku, Tokyo 1818588, Japan

[3] Univ Tokyo, Inst Cosm Ray Res, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778582, Japan

[4] Osaka Metropolitan Univ, Grad Sch Sci, 1-1 Gakuen Cho,Naka Ku, Sakai, Osaka 5998531, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2023年 / 75卷 / 02期

基金：

日本学术振兴会;

关键词：

galaxies; active; -galaxies; individual (NGC 1052)-; nuclei; -masers; DENSE-PLASMA TORUS; H2O MASER; CIRCUMNUCLEAR REGION; GEOMETRIC DISTANCE; MEGAMASERS; DISCOVERY; NUCLEUS;

D O I：

10.1093/pasj/psad011

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Atacama Large Millimeter/submillimeter Array (ALMA) serendipitously detected H2O J(Ka,Kc) = 10(2,9)-9(3, 6 )emission 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 1090 L-?. The line profile consists of a broad velocity component with FWHM = 208 +/- 12 km s(-1) straddling the systemic velocity and a narrow component with FWHM = 44 +/- 3 km s(-1) blueshifted by 160 km s(-1). The profile is sig-nificantly different from the known 22 GHz 6(1, 6)-5(2, 3) maser which shows a broad profile redshifted by 193 km s(-1). The submillimeter maser is spatially unresolved with a synthe-sized beam of 0. "68 x 0. "56 and 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) > 10(4) cm(-3)] molecular gas in front of the core.

引用

页码：L1 / L5

页数：5

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