基于多环�烃红外发射对两个热型星系外流候选对象的表征
星系天体物理
2025-09-16 v1
摘要
我们对两个来自相对低质量、高度倾斜的Virgo星系簇中的星系NGC4424和NGC4694的热型星系外流候选对象进行表征。以往的分析使用阿塔卡马大气镜阵列(ALMA)的碳氢单氧化物(CO)线发射图未将这些来源归类为热外流宿主。利用新的高灵敏度、高空间分辨率的JWST中红外光度测量数据，我们在多环烯烃(PAH)-追踪F770W波段中识别出位于恒星盘之外的延伸结构。这些被识别的结构在MIRI F770W和F2100W波段中均显著亮起，表明它们包含PAH以及其他尘埃颗粒。由于PAH在高温、离子化气体中被破坏，这些结构很可能是温度≤10^4K的冷型外流。本工作代表了一种利用中红外观测识别和测量低质量、低星际形成星系中外流的激动 possibility。
引用
@article{arxiv.2509.12058,
title = {Characterization of Two Cool Galaxy Outflow Candidates Using Mid-Infrared Emission from Polycyclic Aromatic Hydrocarbons},
author = {Jessica Sutter and Karin Sandstrom and Ryan Chown and Oleg Egorov and Adam K. Leroy and Jérémy Chastenet and Alberto Bolatto and Thomas G. Williams and Daniel A. Dale and Amirnezam Amiri and Médéric Boquein and Yixian Cao and Simthembile Dlamini and Éric Emsellem and Hsi-An Pan and Debosmita Pathak and Hwihyun Kim and Ralf S. Klessen and Hannah Koziol and Erik Rosolowsky and Sumit K. Sarbadhicary and Eva Schinnerer and David A. Thilker and Leonardo Úbeda and Tony Weinbeck},
journal= {arXiv preprint arXiv:2509.12058},
year = {2025}
}
备注
Accepted for publication in The Astrophysical Journal Letters, 12 pages, 4 figures and 1 table