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

De Petris, M., Rigby, A.J., Adam, R., Ade, P. ORCID:, Ajeddig, H., Anderson, M. ORCID:, André, P., Artis, E., Aussel, H., Bacmann, A., Beelen, A., Benoît, A., Berta, S., Bing, L., Bourrion, O., Bracco, A., Calvo, M., Catalano, A., De Petris, M., Désert, F.-X., Doyle, S. ORCID:, Driessen, E. F. C., García, P., Gomez, A., Goupy, J., Kéruzoré, F., Kramer, C., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J.-F., Macías-Pérez, J.-F., Maury, A., Mauskopf, P. ORCID:, Mayet, F., Monfardini, A., Muñoz-Echeverría, M., Peretto, N. ORCID:, Perotto, L., Pisano, G. ORCID:, Ponthieu, N., Revéret, V., Ristorcelli, I., Ritacco, A., Romero, C., Roussel, H., Ruppin, F., Schuster, K., Shu, S., Sievers, A., Tucker, C. ORCID:, Watkins, E.J., Zylka, R., Ferragamo, A. and Mayet, F. 2022. Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps. EPJ Web of Conferences 257 , 00041. 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
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Additional Information: This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (
Publisher: Società Italiana di Fisica
ISSN: 2100-014X
Date of First Compliant Deposit: 11 March 2022
Date of Acceptance: 17 January 2022
Last Modified: 12 Apr 2024 01:23

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