Resolved ISM properties and scaling relations in the barred galaxy NGC 3627: constraints from NIKA2 observations
ABSTRACT We investigate the interplay between star formation, interstellar medium (ISM) components, and dust properties in NGC 3627 using new NIKA2 1.15 and 2 mm observations from the IMEGIN Large Program. Our goal is to analyse dust and radio emission, decompose contributions in the millimetre–centimetre regime, and explore ISM properties within the galaxy. We perform spectral energy distribution fitting, at both global and spatial scales, using the THEMIS dust model within the HerBIE code, applied to data from 3.4 $\mu$m to 6 cm. We decompose emission into dust, free–free, and synchrotron components, and examine correlations with gas surface density and star formation activity. Additionally, we analyse the small dust grain fraction and its variation across the galaxy. We find $\sim$10 per cent radio emission at 2 mm, peaking at 18 per cent in the southern bar-end, which hosts the highest star formation activity. However, an isolated star-forming region beyond this bar-end is the most efficient, as indicated by its elevated dust production efficiency and effective yield, predicted by our simplistic dust evolution model. The 160 $\mu$m emission shows the strongest correlation with molecular gas, while 1.15 mm better traces the dust mass surface density. Small grains, which make up $\sim$13 per cent of dust mass (2 $\times$ 10$^7$ M$_{\odot }$), are depleted in intense radiation fields, with a notable deficit in the southern tidal tail. ISM properties and chemical evolution indicate that dynamical processes, such as bar-driven gas flows and tidal interactions, are crucial in shaping the galactic structure, influencing star formation efficiency, and dust distribution.
Authors
- Á. Bongiovanni (ORCID: https://orcid.org/0000-0002-3557-3234)
- B. Ladjelate (ORCID: https://orcid.org/0000-0002-3704-7078)
- F. Kéruzoré (ORCID: https://orcid.org/0000-0002-9605-5588)
- A. Maury (ORCID: https://orcid.org/0000-0002-3801-8754)
- N. Ponthieu (ORCID: https://orcid.org/0000-0002-3101-0768)
- C. Hanser (ORCID: https://orcid.org/0009-0002-9656-9025)
- Stergios Amarantidis (ORCID: https://orcid.org/0000-0001-7948-5714)
- O. Bourrion (ORCID: https://orcid.org/0000-0003-4563-1386)
- M. Muñoz-Echeverría (ORCID: https://orcid.org/0000-0002-5375-9083)
- A. Hughes
- F. Mayet (ORCID: https://orcid.org/0000-0001-9995-4792)
- H. Ajeddig
- L. Pantoni (ORCID: https://orcid.org/0000-0003-2666-5759)
- V. Revéret (ORCID: https://orcid.org/0000-0002-5461-2462)
- C. Tucker (ORCID: https://orcid.org/0000-0002-1851-3918)
- S. Savorgnano (ORCID: https://orcid.org/0009-0008-6617-7972)
- A. Ritacco (ORCID: https://orcid.org/0000-0003-0162-8206)
- S. Katsioli (ORCID: https://orcid.org/0000-0001-7095-8933)
- Florian Galliano
- A. Ferragamo (ORCID: https://orcid.org/0000-0002-7617-7932)
- A. Beelen (ORCID: https://orcid.org/0000-0003-3201-0185)
- G. Pisano (ORCID: https://orcid.org/0000-0003-4302-5681)
- A. Paliwal (ORCID: https://orcid.org/0000-0001-9337-3938)
- J. Tedros (ORCID: https://orcid.org/0009-0009-1755-0598)
- Hervé Aussel
- D. Chérouvrier
- Maarten Baes
- Stefano Berta
- M Calvo
- M W L Smith
- F Ruppin
- R Adam
- K Schuster
- I Myserlis
- A Moyer-Anin
- A Nersesian
- S Doyle
- E F C Driessen
- E M Xilouris
- A Catalano
- R Zylka
- D Paradis
- J Bounmy
- J Goupy
- L Perotto
- A Benoît
- A Monfardini
- C Kramer
- M De Petris
- F Tabatabaei
- A Sievers
- I De Looze
- P Ade
- G Ejlali
- A J Rigby
- N Ysard
- J F Macías-Pérez
- H Roussel
- G Lagache
- P André
- M Sánchez-Portal
- A Gomez
- S C Madden
- J-F Lestrade
- A P Jones
- S Leclercq
Institutions
- Université Claude Bernard Lyon 1 (FR)
- Institut polytechnique de Grenoble (FR)
- University of Rome Tor Vergata (IT)
- Institució Catalana de Recerca i Estudis Avançats (ES)
- Argonne National Laboratory (US)
- Centre National de la Recherche Scientifique (FR)
- University of Leeds (GB)
- Université Toulouse III - Paul Sabatier (FR)
- University of Liège (BE)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- Lyon College (US)
- National and Kapodistrian University of Athens (GR)
- Université Paris Cité (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris Sciences et Lettres (FR)
- Université Paris-Saclay (FR)
- Institut d'Astrophysique de Paris (FR)
- École Normale Supérieure - PSL (FR)
- Sorbonne Université (FR)
- Astrophysique, Instrumentation et Modélisation (FR)
- Institut de Radioastronomie Millimétrique (FR)
- Laboratoire d’Astrophysique de Marseille (FR)
- Institut d'Astrophysique Spatiale (FR)
- École Normale Supérieure (BI)
- Institute of Space Sciences (ES)
- National Observatory of Athens (GR)
- Institute of Astronomy (RU)
- Observatoire de la Côte d’Azur (FR)
- CEA Paris-Saclay (FR)
- Centro de Astrobiología (ES)
- Institut Néel (FR)
- Institute for Research in Fundamental Sciences (IR)
- Astronomy and Space (AU)
- Instituto de Radioastronomía Milimétrica (ES)
- Osservatorio Astronomico di Cagliari (IT)
- Institute of Nuclear Physics of Lyon (FR)
- Cardiff University (GB)
- Sapienza University of Rome (IT)
- Université Grenoble Alpes (FR)
- Netherlands Institute for Radio Astronomy (NL)
- KU Leuven (BE)
Publication Details
- Journal
- Monthly Notices of the Royal Astronomical Society
- Published
- 2026-01-14
- DOI
- https://doi.org/10.1093/mnras/stag083
- Primary Topic
- Galaxies: Formation, Evolution, Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Agence Nationale de la Recherche
- Hellenic Foundation for Research and Innovation