OUTFLOWING DIFFUSE GAS IN THE ACTIVE GALACTIC NUCLEUS OF NGC 1068

被引：4

作者：

Geballe, T. R. ^{[1
]}

Mason, R. E. ^{[1
]}

Oka, T. ^{[2
,3
]}

机构：

[1] Gemini Observ, Hilo, HI 96720 USA

[2] Univ Chicago, Dept Astron & Astrophys, Enrico Fermi Inst, Chicago, IL 60637 USA

[3] Univ Chicago, Dept Chem, Enrico Fermi Inst, Chicago, IL 60637 USA

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 812卷 / 01期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

galaxies: active; galaxies: Seyfert; galaxies: ISM; ISM: molecules; NARROW-LINE REGION; INTERSTELLAR-MEDIUM; MU-M; MOLECULAR GAS; H-3(+); NGC-1068; TORUS; SPECTROSCOPY; KINEMATICS; DUST;

D O I：

10.1088/0004-637X/812/1/56

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Spectra of the archetypal Type II Seyfert galaxy NGC 1068 in a narrow wavelength interval near 3.7 mu m have revealed a weak absorption feature due to two lines of the molecular ion H-3(+). The observed wavelength of the feature corresponds to a velocity of -70 km s(-1) relative to the systemic velocity of the galaxy, implying an outward flow from the nucleus along the line of sight. The absorption by H-3(+) along with the previously known broad hydrocarbon absorption at 3.4 mu m are probably formed in diffuse gas that is in close proximity to the continuum source, i.e., within a few tens of parsecs of the central engine. Based on that conclusion and the measured H-3(+) absorption velocity and with the assumption of a spherically symmetric wind we estimate a rate of mass outflow from the active galactic nucleus of similar to 1 M(circle dot)yr(-1).

引用

页数：6

共 31 条

[1] The elusive dust torus of NGC 1068 unveiled by adaptive optics observations from 2.2 mu m to 4.8 mu m [J].