Exploring the interstellar medium of NGC 891 at millimeter wavelengths using the NIKA2 camera
Abstract
In the framework of the IMEGIN Large Program, we used the NIKA2 camera on the IRAM 30-m telescope to observe the edge-on galaxy NGC 891 at 1.15 mm and 2 mm and at a FWHM of 11.1" and 17.6", respectively. Multiwavelength data enriched with the new NIKA2 observations fitted by the HerBIE SED code (coupled with the THEMIS dust model) were used to constrain the physical properties of the ISM. Emission originating from the diffuse dust disk is detected at all wavelengths from mid-IR to mm, while mid-IR observations reveal warm dust emission from compact HII regions. Indications of mm excess emission have also been found in the outer parts of the galactic disk. Furthermore, our SED fitting analysis constrained the mass fraction of the small (< 15 Angstrom) dust grains. We found that small grains constitute 9.5% of the total dust mass in the galactic plane, but this fraction increases up to ~ 20% at large distances (|z| > 3 kpc) from the galactic plane.
Cite
@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}
}
Comments
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