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Dynamical accretion flows - ALMAGAL: flows along filamentary structures in high-mass star-forming clusters

Context. Investigating the flow of material along filamentary structures towards the central core can help provide insights into high-mass star formation and evolution. Aims. Our main motivation is to answer the question of what the properties of accretion flows are in star-forming clusters. We used...

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Hauptverfasser: Wells, Molly (VerfasserIn) , Beuther, Henrik (VerfasserIn) , Molinari, S. (VerfasserIn) , Schilke, P. (VerfasserIn) , Battersby, C. (VerfasserIn) , Ho, P. (VerfasserIn) , Sánchez-Monge, Á (VerfasserIn) , Jones, B. (VerfasserIn) , Scheuck, M. B. (VerfasserIn) , Syed, J. (VerfasserIn) , Gieser, C. (VerfasserIn) , Kuiper, R. (VerfasserIn) , Elia, D. (VerfasserIn) , Coletta, A. (VerfasserIn) , Traficante, A. (VerfasserIn) , Wallace, J. (VerfasserIn) , Rigby, A. J. (VerfasserIn) , Klessen, Ralf S. (VerfasserIn) , Zhang, Q. (VerfasserIn) , Walch, S. (VerfasserIn) , Beltrán, M. T. (VerfasserIn) , Tang, Y. (VerfasserIn) , Fuller, G. A. (VerfasserIn) , Lis, D. C. (VerfasserIn) , Möller, T. (VerfasserIn) , Tak, F. van der (VerfasserIn) , Klaassen, P. D. (VerfasserIn) , Clarke, S. D. (VerfasserIn) , Moscadelli, L. (VerfasserIn) , Mininni, C. (VerfasserIn) , Zinnecker, H. (VerfasserIn) , Maruccia, Y. (VerfasserIn) , Pezzuto, S. (VerfasserIn) , Benedettini, M. (VerfasserIn) , Soler, J. D. (VerfasserIn) , Brogan, C. L. (VerfasserIn) , Avison, A. (VerfasserIn) , Sanhueza, P. (VerfasserIn) , Schisano, E. (VerfasserIn) , Liu, T. (VerfasserIn) , Fontani, F. (VerfasserIn) , Rygl, K. L. J. (VerfasserIn) , Wyrowski, F. (VerfasserIn) , Bally, J. (VerfasserIn) , Walker, D. L. (VerfasserIn) , Ahmadi, A. (VerfasserIn) , Koch, P. (VerfasserIn) , Merello, M. (VerfasserIn) , Law, C. Y. (VerfasserIn) , Testi, L. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: October 2024
In: Astronomy and astrophysics
Year: 2024, Jahrgang: 690, Pages: 1-16
ISSN:1432-0746
DOI:10.1051/0004-6361/202449794
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202449794
Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2024/10/aa49794-24/aa49794-24.html
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Verfasserangaben:M.R.A. Wells, H. Beuther, S. Molinari, P. Schilke, C. Battersby, P. Ho, Á Sánchez-Monge, B. Jones, M. B. Scheuck, J. Syed, C. Gieser, R. Kuiper, D. Elia, A. Coletta, A. Traficante, J. Wallace, A.J. Rigby, R.S. Klessen, Q. Zhang, S. Walch, M.T. Beltrán, Y. Tang, G.A. Fuller, D.C. Lis, T. Möller, F. van der Tak, P.D. Klaassen, S.D. Clarke, L. Moscadelli, C. Mininni, H. Zinnecker, Y. Maruccia, S. Pezzuto, M. Benedettini, J.D. Soler, C.L. Brogan, A. Avison, P. Sanhueza, E. Schisano, T. Liu, F. Fontani, K.L.J. Rygl, F. Wyrowski, J. Bally, D.L. Walker, A. Ahmadi, P. Koch, M. Merello, C.Y. Law, and L. Testi

MARC

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245 1 0 |a Dynamical accretion flows - ALMAGAL  |b flows along filamentary structures in high-mass star-forming clusters  |c M.R.A. Wells, H. Beuther, S. Molinari, P. Schilke, C. Battersby, P. Ho, Á Sánchez-Monge, B. Jones, M. B. Scheuck, J. Syed, C. Gieser, R. Kuiper, D. Elia, A. Coletta, A. Traficante, J. Wallace, A.J. Rigby, R.S. Klessen, Q. Zhang, S. Walch, M.T. Beltrán, Y. Tang, G.A. Fuller, D.C. Lis, T. Möller, F. van der Tak, P.D. Klaassen, S.D. Clarke, L. Moscadelli, C. Mininni, H. Zinnecker, Y. Maruccia, S. Pezzuto, M. Benedettini, J.D. Soler, C.L. Brogan, A. Avison, P. Sanhueza, E. Schisano, T. Liu, F. Fontani, K.L.J. Rygl, F. Wyrowski, J. Bally, D.L. Walker, A. Ahmadi, P. Koch, M. Merello, C.Y. Law, and L. Testi 
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520 |a Context. Investigating the flow of material along filamentary structures towards the central core can help provide insights into high-mass star formation and evolution. Aims. Our main motivation is to answer the question of what the properties of accretion flows are in star-forming clusters. We used data from the ALMA Evolutionary Study of High Mass Protocluster Formation in the Galaxy (ALMAGAL) survey to study 100 ALMAGAL regions at a ∼1″ resolution, located between ∼2 and 6 kpc. Methods. Making use of the ALMAGAL ∼1.3 mm line and continuum data, we estimated flow rates onto individual cores. We focus specifically on flow rates along filamentary structures associated with these cores. Our primary analysis is centered around position velocity cuts in H2CO (3 0, 3- 2 0, 2), which allow us to measure the velocity fields surrounding these cores. Combining this work with column density estimates, we were able to derive the flow rates along the extended filamentary structures associated with cores in these regions. Results. We selected a sample of 100 ALMAGAL regions, covering four evolutionary stages from quiescent to protostellar, young stellar objects (YSOs), and HII regions (25 each). Using a dendrogram and line analysis, we identify a final sample of 182 cores in 87 regions. In this paper, we present 728 flow rates for our sample (4 per core), analysed in the context of evolutionary stage, distance from the core, and core mass. On average, for the whole sample, we derived flow rates on the order of ∼10−4 M⊙ yr−1 with estimated uncertainties of ±50%. We see increasing differences in the values among evolutionary stages, most notably between the less evolved (quiescent and protostellar) and more evolved (YSO and HII region) sources and we also see an increasing trend as we move further away from the centre of these cores. We also find a clear relationship between the calculated flow rates and core masses ∼M2/3, which is in line with the result expected from the tidal-lobe accretion mechanism. The significance of these relationships is tested with Kolmogorov-Smirnov and Mann-Whitney U tests.Conclusions. Overall, we see an increasing trend in the relationships between the flow rate and the three investigated parameters, namely: evolutionary stage, distance from the core, and core mass. 
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