NIKA2 对金牛座和英仙座中无星核心的观测
星系天体物理
2024-04-08 v2
摘要
尘埃无星核心在调控恒星与行星形成的初始阶段中起着重要作用。在其内部，尘埃颗粒发生凝聚并形成冰幔，从而改变毫米波发射率并进而影响冷却能力。我们利用 IRAM 30 米望远镜上的 NIKA2 相机，对金牛座和英仙座附近银河系纤维状结构中的四个区域（包含十余个核心）进行了成图观测。将 1mm 至 2mm 流量比图与来自 Herschel 的尘埃温度图相结合，得以在金牛座和英仙座分别以 2430 和 5600 a.u. 的分辨率创建尘埃发射率指数 图。在此，我们研究其随总柱密度和环境的变化。核心中心（mag）处的 值在 到 之间显著变化。若干核心显示出 从外围约 mag 到光学消光峰值处的强烈上升，这与颗粒模型的预测以及无星核心致密内部中凝聚颗粒上冰幔的逐步积累一致。
引用
@article{arxiv.2310.01044,
title = {NIKA2 observations of starless cores in Taurus and Perseus},
author = {C. Kramer and R. Adam and P. Ade and H. Ajeddig and P. Andre and E. Artis and H. Aussel and A. Beelen and A. Beno and S. Berta and L. Bing and O. Bourrion and M. Calvo and P. Caselli and A. Catalano and M. DePetris and F. -X. Desert and S. Doyle and E. F. C. Driessen and G. Ejlali and A. Fuente and A. Gomez and J. Goupy and C. Hanser and S. Katsioli and F. Keruzore and B. Ladjelate and G. Lagache and S. Leclercq and J. F. Lestrade and J. F. Macias-Perez and S. C. Madden and A. Maury and P. Mauskopf and F. Mayet and A. Monfardini and A. Moyer-Anin and M. Munoz-Echeverria and D. Navarro-Almaida and L. Perotto and G. Pisano and N. Ponthieu and V. Reveret and A. J. Rigby and A. Ritacco and C. Romero and H. Roussel and F. Ruppin and K. Schuster and A. Sievers and C. Tucker and R. Zylka},
journal= {arXiv preprint arXiv:2310.01044},
year = {2024}
}
备注
to appear in Proc. of the mm Universe 2023 conference, Grenoble (France), June 2023, published by F. Mayet et al. (Eds), EPJ Web of conferences, EDP Sciences