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Dust Emission in Galaxies at Millimeter Wavelengths: Cooling of star forming regions in NGC6946

Ejlali, G. and Adam, R. and Ade, P. and Ajeddig, H. and André, P. and Artis, E. and Aussel, H. and Beelen, A. and Benoît, A. and Berta, S. and Bing, L. and Bourrion, O. and Calvo, M. and Catalano, A. and de Looze, I. and De Petris, M. and Désert, F.-X. and Doyle, S. and Driessen, E.F. C. and Galametz, M. and Galliano, F. and Gomez, A. and Goupy, J. and Jones, A.P. and Hughes, A. and Katsioli, S. and Kéruzoré, F. and Kramer, C. and Ladjelate, B. and Lagache, G. and Leclercq, S. and Lestrade, J.-F. and Macías-Pérez, J.-F. and Madden, S.C. and Maury, A. and Mauskopf, P. and Mayet, F. and Monfardini, A. and Muñoz-Echeverría, M. and Nersesian, A. and Perotto, L. and Pisano, G. and Ponthieu, N. and Revéret, V. and Rigby, A.J. and Ritacco, A. and Romero, C. and Roussel, H. and Ruppin, F. and Schuster, K. and Shu, S. and Sievers, A. and Smith, M. W. S. L. and Tabatabaei, F. S. and Tucker, C. and Xilouris, E.M. and Zylka, R. (2022) Dust Emission in Galaxies at Millimeter Wavelengths: Cooling of star forming regions in NGC6946. EPJ Web of Conferences, 257 . Art. No. 00016. ISSN 2100-014X. doi:10.1051/epjconf/202225700016.

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Interstellar dust plays an important role in the formation of molecular gas and the heating and cooling of the interstellar medium. The spatial distribution of the mm-wavelength dust emission from galaxies is largely unexplored. The NIKA2 Guaranteed Time Project IMEGIN (Interpreting the Millimeter Emission of Galaxies with IRAM and NIKA2) has recently mapped the mm emission in the grand design spiral galaxy NGC6946. By subtracting the contributions from the free-free, synchrotron, and CO line emission, we map the distribution of the pure dust emission at 1:15mm and 2mm. Separating the arm/interarm regions, we find a dominant 2mm emission from interarms indicating the significant role of the general interstellar radiation field in heating the cold dust. Finally, we present maps of the dust mass, temperature, and emissivity index using the Bayesian MCMC modeling of the spectral energy distribution in NGC6946.

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Shu, S.0000-0002-6370-2101
Additional Information:© The Authors, published by EDP Sciences, 2022. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Published online: 17 January 2022. We would like to thank the IRAM staff for their support during the campaigns. The NIKA2 dilution cryostat has been designed and built at the Institut Néel. In particular, we acknowledge the crucial contribution of the Cryogenics Group, and in particular Gregory Garde, Henri Rodenas, Jean Paul Leggeri, Philippe Camus. This work has been partially funded by the Foundation Nanoscience Grenoble and the LabEx FOCUS ANR-11-LABX-0013. This work is supported by the French National Research Agency under the contracts "MKIDS", "NIKA" and ANR-15-CE31-0017 and in the framework of the "Investissements d’avenir” program (ANR-15-IDEX-02). This work has benefited from the support of the European Research Council Advanced Grant ORISTARS under the European Union’s Seventh Framework Programme (Grant Agreement no. 291294). This work was supported by the Programme National “Physique et Chimie du Milieu Interstellaire” (PCMI) of CNRS/INSU with INC/INP co-funded by CEA and CNES. F.R. acknowledges financial supports provided by NASA through SAO Award Number SV2-82023 issued by the Chandra X-Ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of NASA under contract NAS8-03060.
Funding AgencyGrant Number
Foundation Nanoscience GrenobleUNSPECIFIED
Agence Nationale pour la Recherche (ANR)ANR-11-LABX-0013
Agence Nationale pour la Recherche (ANR)ANR-15-CE31-0017
Agence Nationale pour la Recherche (ANR)ANR-15-IDEX-02
European Research Council (ERC)291294
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Commissariat a l'Energie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Record Number:CaltechAUTHORS:20220218-499047100
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Official Citation:Dust Emission in Galaxies at Millimeter Wavelengths: Cooling of star forming regions in NGC6946. G. Ejlali, R. Adam, P. Ade, H. Ajeddig, P. André, E. Artis, H. Aussel, A. Beelen, A. Benoît, S. Berta, L. Bing, O. Bourrion, M. Calvo, A. Catalano, I. de Looze, M. De Petris, F.-X. Désert, S. Doyle, E.F. C. Driessen, M. Galametz, F. Galliano, A. Gomez, J. Goupy, A.P. Jones, A. Hughes, S. Katsioli, F. Kéruzoré, C. Kramer, B. Ladjelate, G. Lagache, S. Leclercq, J.-F. Lestrade, J.-F. Macías-Pérez, S.C. Madden, A. Maury, P. Mauskopf, F. Mayet, A. Monfardini, M. Muñoz-Echeverría, A. Nersesian, L. Perotto, G. Pisano, N. Ponthieu, V. Revéret, A.J. Rigby, A. Ritacco, C. Romero, H. Roussel, F. Ruppin, K. Schuster, S. Shu, A. Sievers, M. W. S. L. Smith, F. S. Tabatabaei, C. Tucker, E.M. Xilouris and R. Zylka. EPJ Web Conf., 257 (2022) 00016; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113511
Deposited By: Tony Diaz
Deposited On:18 Feb 2022 23:37
Last Modified:18 Feb 2022 23:37

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