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Galactic star formation with NIKA2 (GASTON): Filament convergence and its link to star formation

Peretto, N. and Adam, R. and Ade, P. and Ajeddig, H. and André, P. and Artis, E. and Aussel, H. and Bacmann, A. and Beelen, A. and Benoît, A. and Berta, S. and Bing, L. and Bourrion, O. and Calvo, M. and Catalano, A. and De Petris, M. and Désert, F.-X. and Doyle, S. and Driessen, E. F. C. and Gomez, A. and Goupy, J. 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 Maury, A. and Mauskopf, P. and Mayet, F. and Monfardini, A. and Muñoz-Echeverría, M. and Perotto, L. and Pisano, G. and Ponthieu, N. and Revéret, V. and Rigby, A. and Ristorcelli, I. and Ritacco, A. and Romero, C. and Roussel, H. and Ruppin, F. and Schuster, K. and Shu, S. and Sievers, A. and Tucker, C. and Zylka, R. (2022) Galactic star formation with NIKA2 (GASTON): Filament convergence and its link to star formation. EPJ Web of Conferences, 257 . Art. No. 00037. ISSN 2100-014X. doi:10.1051/epjconf/202225700037.

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In the past decade filaments have been recognised as a major structural element of the interstellar medium, the densest of these filaments hosting the formation of most stars. In some star-forming molecular clouds converging networks of filaments, also known as hub filament systems, can be found. These hubs are believed to be preferentially associated to massive star formation. As of today, there are no metrics that allow the systematic quantification of a filament network convergence. Here, we used the IRAM 30m NIKA2 observations of the Galactic plane from the GASTON large programme to systematically identify filaments and produce a filament convergence parameter map. We use such a map to show that: i. hub filaments represent a small fraction of the global filament population; ii. hubs host, in proportion, more massive and more luminous compact sources that non-hubs; iii. hub-hosting clumps are more evolved that non-hubs; iv. no discontinuities are observed in the properties of compact sources as a function of convergence parameter. We propose that the rapid global collapse of clumps is responsible for (re)organising filament networks into hubs and, in parallel, enhancing the mass growth of compact sources.

Item Type:Article
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URLURL TypeDescription Paper
Peretto, N.0000-0002-6893-602X
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. NP and AJR would like to thank the STFC for financial support under the consolidated grant numbers ST/N000706/1 and ST/S00033X/1, and the Royal Society for providing computing resources under Research Grant number RG150741. 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). 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
Science and Technology Facilities Council (STFC)ST/N000706/1
Science and Technology Facilities Council (STFC)ST/S00033X/1
Royal SocietyRG150741
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
Record Number:CaltechAUTHORS:20220214-834130700
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Official Citation:Galactic star formation with NIKA2 (GASTON): Filament convergence and its link to star formation. N. Peretto, R. Adam, P. Ade, H. Ajeddig, P. André, E. Artis, H. Aussel, A. Bacmann, A. Beelen, A. Benoît, S. Berta, L. Bing, O. Bourrion, M. Calvo, A. Catalano, M. De Petris, F.-X. Désert, S. Doyle, E. F. C. Driessen, A. Gomez, J. Goupy, F. Kéruzoré, C. Kramer, B. Ladjelate, G. Lagache, S. Leclercq, J.-F. Lestrade, J.-F. Macías-Pérez, A. Maury, P. Mauskopf, F. Mayet, A. Monfardini, M. Muñoz-Echeverría, L. Perotto, G. Pisano, N. Ponthieu, V. Revéret, A. Rigby, I. Ristorcelli, A. Ritacco, C. Romero, H. Roussel, F. Ruppin, K. Schuster, S. Shu, A. Sievers, C. Tucker and R. Zylka. EPJ Web Conf., 257 (2022) 00037; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113447
Deposited By: Tony Diaz
Deposited On:15 Feb 2022 18:15
Last Modified:15 Feb 2022 18:15

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