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Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps

Rigby, A. J. and Adam, R. and Ade, P. and Ajeddig, H. and Anderson, M. 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 Bracco, A. and Calvo, M. and Catalano, A. and De Petris, M. and Désert, F.-X. and Doyle, S. and Driessen, E. F. C. and García, P. 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 Peretto, N. and Perotto, L. and Pisano, G. and Ponthieu, N. and Revéret, V. 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 Watkins, E.J. and Zylka, R. (2022) Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps. EPJ Web of Conferences, 257 . Art. No. 00041. ISSN 2100-014X. doi:10.1051/epjconf/202225700041.

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High-mass stars (m* ≳ 8 M_⊙) play a crucial role in the evolution of galaxies, and so it is imperative that we understand how they are formed. We have used the New IRAM KIDs Array 2 (NIKA2) camera on the Institut de Radio Astronomie Millimétrique (IRAM) 30-m telescope to conduct high-sensitivity continuum mapping of ~ 2 deg² of the Galactic plane (GP) as part of the Galactic Star Formation with NIKA2 (GASTON) large program. We have identified a total of 1467 clumps within our deep 1.15 mm continuum maps and, by using overlapping continuum, molecular line, and maser parallax data, we have determined their distances and physical properties. By placing them upon an approximate evolutionary sequence based upon 8 μm Spitzer imaging, we find evidence that the most massive dense clumps accrete material from their surrounding environment during their early evolution, before dispersing as star formation advances, supporting clump-fed models of high-mass star formation.

Item Type:Article
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URLURL TypeDescription Paper
Rigby, A. J.0000-0002-3351-2200
Shu, S.0000-0002-6370-2101
Additional Information:© The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 ( Published online 17 January 2022. AJR and NP 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 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
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:20220202-647102100
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Official Citation:Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps. A.J. Rigby, R. Adam, P. Ade, H. Ajeddig, M. Anderson, P. André, E. Artis, H. Aussel, A. Bacmann, A. Beelen, A. Benoît, S. Berta, L. Bing, O. Bourrion, A. Bracco, M. Calvo, A. Catalano, M. De Petris, F.-X. Désert, S. Doyle, E. F. C. Driessen, P. García, 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, N. Peretto, L. Perotto, G. Pisano, N. Ponthieu, V. Revéret, I. Ristorcelli, A. Ritacco, C. Romero, H. Roussel, F. Ruppin, K. Schuster, S. Shu, A. Sievers, C. Tucker, E.J. Watkins and R. Zylka. EPJ Web Conf., 257 (2022) 00041; DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113218
Deposited By: Tony Diaz
Deposited On:02 Feb 2022 17:59
Last Modified:02 Feb 2022 17:59

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