Merger remnant in TXS 1033+026. I. Hα and 21 cm observations suggest counter-rotating gas

IF 6.1 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astronomy & Astrophysics Pub Date : 2026-10-14 DOI:10.1051/0004-6361/202661548

J. N. H. S. Aditya,Hyein Yoon,L. G. Dahmer-Hahn,Renzhi Su,Rajeshwari Dutta,Xiaolong Yang,Elaine Sadler,Matthew T. Whiting

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引用次数: 0

Abstract

We conducted eMERLIN and Gemini integral field unit (IFU) observations towards TXS 1033+026, a post-merger ultraluminous infrared galaxy, to study the radio continuum and ̊m Hα and . We note that these are the first results to probe ̊m Hα and cold neutral hydrogen gas in TXS 1033+026 at sub-kiloparsec scales. 21 cm lines at sub-kiloparsec scales. We find a symmetric, two-sided core-jet structure in both L- (≈ 1.4 GHz) and C- (≈ 4.8 GHz) band continuum images. The active galactic nucleus likely has a double-double radio morphology, indicating possible multiple episodes of activity. The Gemini IFU observations provided sub-arcsecond resolution. Results from these observations suggest the presence of a kiloparsec-scale circumnuclear, warped ̊m Hα disc that rotates around the core. The 21 cm maps reveal a complex kinematic structure, with indications of two counter-rotating gas components orbiting the core-jet axis; one of these components counter-rotates relative to the kiloparsec-scale ̊m Hα disc. However, the true morphology of this structure may be more complex than our interpretation suggests. We estimate a 21 cm velocity-integrated optical depth of ̊m 90 ± 3 km s^ -1

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txs1033 +026的合并残余。I. Hα和21 cm的观测表明是反向旋转气体

我们对合并后的超发光红外星系TXS 1033+026进行了eMERLIN和Gemini积分场单元（IFU）观测，以研究射电连续统和Hα和Hα。我们注意到，这是在亚千秒尺度上探测TXS 1033+026中的Hα和冷中性氢气的第一个结果。亚千秒尺度的21厘米线。我们在L-(≈1.4 GHz)和C-(≈4.8 GHz)波段连续图像中发现了对称的双面核射流结构。活动星系核可能具有双射电形态，表明可能存在多期活动。双子座IFU的观测提供了亚弧秒的分辨率。这些观测的结果表明，存在一个千秒秒尺度的绕核、绕核心旋转的扭曲的Hα盘。21厘米的地图揭示了一个复杂的运动学结构，有迹象表明，两个反向旋转的气体成分围绕核心射流轴旋转；其中一个分量相对于千帕秒尺度的Hα圆盘逆时针旋转。然而，这种结构的真实形态可能比我们的解释所暗示的更为复杂。我们估计21厘米的速度积分光学深度为90±3 km s^ -1

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来源期刊

Astronomy & Astrophysics 地学天文-天文与天体物理

CiteScore

10.20

自引率

27.70%

发文量

2105

审稿时长

1-2 weeks

期刊介绍： Astronomy & Astrophysics is an international Journal that publishes papers on all aspects of astronomy and astrophysics (theoretical, observational, and instrumental) independently of the techniques used to obtain the results.