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.
Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps / Rigby, A. J.; Adam, R.; Ade, P.; Ajeddig, H.; Anderson, M.; 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.; 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.; Mayet, F.; Monfardini, A.; Muñoz-Echeverría, M.; Peretto, N.; Perotto, L.; Pisano, G.; Ponthieu, N.; Revéret, V.; Ristorcelli, I.; Ritacco, A.; Romero, C.; Roussel, H.; Ruppin, F.; Schuster, K.; Shu, S.; Sievers, A.; Tucker, C.; Watkins, E. J.; Zylka, and R.. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 257:(2022). (Intervento presentato al convegno mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera tenutosi a Rome) [10.1051/epjconf/202225700041].
Galactic Star Formation with NIKA2 (GASTON): Evidence of mass accretion onto dense clumps
M. De Petris;G. Pisano;
2022
Abstract
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.| File | Dimensione | Formato | |
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Rigby_Galactic Star Formation_2022.pdf
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Note: https://www.epj-conferences.org/articles/epjconf/abs/2022/01/epjconf_mmUniverse2021_00041/epjconf_mmUniverse2021_00041.html
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