利用NIKA2相机在毫米波长下探测NGC 891的星际介质
星系天体物理
2024-04-08 v1
摘要
在IMEGIN大型计划框架下，我们使用IRAM 30米望远镜上的NIKA2相机在1.15 mm和2 mm波长、分别对应于11.1"和17.6"的FWHM下观测了侧向星系NGC 891。结合新NIKA2观测并经由HerBIE SED代码（耦合THEMIS尘埃模型）拟合的多波长数据被用于约束星际介质的物理性质。来自弥漫尘埃盘的发射在所有从中红外到毫米波的波长上均被探测到，而中红外观测揭示了来自致密HII区的暖尘发射。在星系盘外缘也发现了毫米波超量发射的迹象。此外，我们的SED拟合分析约束了小（< 15 Angstrom）尘埃颗粒的质量分数。我们发现小颗粒占星系平面内总尘埃质量的9.5%，但该比例在距星系平面较大距离（|z| > 3 kpc）处增至约20%。
引用
@article{arxiv.2310.04204,
title = {Exploring the interstellar medium of NGC 891 at millimeter wavelengths using the NIKA2 camera},
author = {S. Katsioli and R. Adam and P. Ade and H. Ajeddig and P. André and E. Artis and H. Aussel and M. Baes and A. Beelen and A. Benoît and S. Berta and L. Bing and O. Bourrion and M. Calvo and A. Catalano and C. J. R. Clark and I. De Looze and M. De Petris and F. -X. Désert and S. Doyle and E. F. C. Driessen and G. Ejlali and M. Galametz and F. Galliano and A. Gomez and J. Goupy and C. Hanser and A. Hughes and F. Kéruzoré and C. Kramer and A. P. Jones and B. Ladjelate and G. Lagache and S. Leclercq and J. -F. Lestrade and J. F. Macías-Pérez and S. C. Madden and A. Maury and P. Mauskopf and F. Mayet and A. Monfardini and A. Moyer-Anin and M. Muñoz-Echeverría and A. Nersesian and L. Pantoni and D. Paradis and L. Perotto and G. Pisano and N. Ponthieu and V. Revéret and A. J. Rigby and A. Ritacco and C. Romero and H. Roussel and F. Ruppin and K. Schuster and A. Sievers and M. W. L. Smith and J. Tedros and F. Tabatabaei and C. Tucker and E. M. Xilouris and N. Ysard and R. Zylka},
journal= {arXiv preprint arXiv:2310.04204},
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