ALMA-IMF. I. Investigating the origin of stellar masses: Introduction to the Large Program and first results - Archive ouverte HAL
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2022

ALMA-IMF. I. Investigating the origin of stellar masses: Introduction to the Large Program and first results

Frédérique Motte (1) , Sylvain Bontemps (2) , Timéa Csengeri (2) , Yohan Pouteau (1) , Fabien Louvet (1, 3, 4) , Amelia M. Stutz (5, 6) , Nichol Cunningham (1) , Ana López-Sepulcre (1) , Nathalie Brouillet (2) , Roberto Galván-Madrid (7) , Adam Ginsburg (8) , Luke Maud (9) , Alexander Men’shchikov (3) , Fumitaka Nakamura (10, 11) , Thomas Nony (7) , Patricio Sanhueza (10, 11) , Rodrigo H. Álvarez-Gutiérrez (5) , Mélanie Armante (12, 13) , Tapas Baug (14) , Melisse Bonfand (15) , Gemma Busquet (1, 16, 17) , Edwige Chapillon (15, 18) , Daniel Díaz-González (7) , Manuel Fernández-López (19) , Andrés Guzmán (10) , Fabrice Herpin (15) , Hong-Li Liu (5, 20) , Fernando A. Olguin (21) , Allison P. M. Towner (8) , John Bally (22) , Cara Battersby (23) , Jonathan Braine (15) , Leonardo Bronfman (4) , H.-R. V. Chen (21) , Pierre Dell'Ova (12) , James Di Francesco (24) , Marta González (1) , Antoine Gusdorf (12) , Patrick Hennebelle (3) , Natsuko Izumi (10, 25, 26) , Isabelle Joncour (1) , Yueh-Ning Lee (27) , Bertrand Lefloch (1) , Pierre Lesaffre (12) , Xing Lu (3) , Karl Menten (28) , Raphaël Mignon-Risse (3) , Jordan Molet (15) , Estelle Moraux (1) , Lee Mundy (29) , Quang Nguyen Luong (30) , Nastassia Reyes (31) , Nicolas Reyes (28, 4) , S. D. Reyes Reyes (5) , Jean-François Robitaille (1) , Erik Rosolowsky (32) , Nicolas Antonio Sandoval-Garrido (5) , Frédéric Schuller (28, 33) , Brian E Svoboda (34) , Ken'Ichi Tatematsu (10) , Benjamin Thomasson (1) , Daniel Lewis Walker (23) , Benjamin Wu (10, 35) , Anthony Whitworth (36) , Friedrich Wyrowski (28)
1 IPAG - Institut de Planétologie et d'Astrophysique de Grenoble
2 FEMIS 2021
3 AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
4 UCHILE - Universidad de Chile = University of Chile [Santiago]
5 UdeC - Universidad de Concepción = University of Concepción [Chile]
6 MPIA - Max Planck Institute for Astronomy
7 IRyA - Instituto de Radioastronomía y Astrofísica [Mexico]
8 UF - University of Florida [Gainesville]
9 ESO - European Southern Observatory
10 NAOJ - National Astronomical Observatory of Japan
11 SOKENDAI - Graduate University for Advanced Studies [Hayama]
12 Astrophysique
13 Observatoire de Paris
14 S. N. Bose National Centre for Basic Sciences
15 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
16 ICE-CSIC - Institut de Ciencies de l'Espai [Barcelona]
17 IEEC-CSIC - Institut d'Estudis Espacials de Catalunya
18 IRAM - Institut de RadioAstronomie Millimétrique
19 IAR - Instituto Argentino de Radioastronomia
20 Yunnan University
21 NTHU - National Tsing Hua University [Hsinchu]
22 Department of Astrophysical and Planetary Sciences [Boulder]
23 UCONN - University of Connecticut
24 NRC - National Research Council of Canada
25 Ibaraki University
26 ASIAA - Academia Sinica Institute of Astronomy and Astrophysics
27 NTNU - National Taiwan Normal University
28 Max Planck Institute for Radio Astronomy
29 University of Maryland [College Park]
30 AUP - The American University of Paris
31 UMR MARBEC - MARine Biodiversity Exploitation and Conservation - MARBEC
32 University of Alberta
33 AIP - Leibniz-Institut für Astrophysik Potsdam
34 NRAO - National Radio Astronomy Observatory [Socorro]
35 NVIDIA Research [Austin]
36 School of Physics and Astronomy [Cardiff]
Frédérique Motte
Connectez-vous pour contacter l'auteur
Institut de Planétologie et d'Astrophysique de Grenoble
Sylvain Bontemps
FEMIS 2021
Timéa Csengeri
FEMIS 2021
Yohan Pouteau
  • Fonction : Auteur
Institut de Planétologie et d'Astrophysique de Grenoble
Fabien Louvet
Institut de Planétologie et d'Astrophysique de Grenoble
Astrophysique Interprétation Modélisation
Universidad de Chile = University of Chile [Santiago]
Amelia M. Stutz
Universidad de Concepción = University of Concepción [Chile]
Max Planck Institute for Astronomy
Nichol Cunningham
Institut de Planétologie et d'Astrophysique de Grenoble
Ana López-Sepulcre
Institut de Planétologie et d'Astrophysique de Grenoble
Nathalie Brouillet
FEMIS 2021
Roberto Galván-Madrid
Instituto de Radioastronomía y Astrofísica [Mexico]
Adam Ginsburg
University of Florida [Gainesville]
Luke Maud
European Southern Observatory
Alexander Men’shchikov
  • Fonction : Auteur
  • PersonId : 965697
Astrophysique Interprétation Modélisation
Fumitaka Nakamura
National Astronomical Observatory of Japan
Graduate University for Advanced Studies [Hayama]
Thomas Nony
Instituto de Radioastronomía y Astrofísica [Mexico]
Patricio Sanhueza
National Astronomical Observatory of Japan
Graduate University for Advanced Studies [Hayama]
Rodrigo H. Álvarez-Gutiérrez
Universidad de Concepción = University of Concepción [Chile]
Mélanie Armante
  • Fonction : Auteur
Astrophysique
Observatoire de Paris
Tapas Baug
S. N. Bose National Centre for Basic Sciences
Melisse Bonfand
  • Fonction : Auteur
Laboratoire d'Astrophysique de Bordeaux [Pessac]
Gemma Busquet
Institut de Planétologie et d'Astrophysique de Grenoble
Institut de Ciencies de l'Espai [Barcelona]
Institut d'Estudis Espacials de Catalunya
Edwige Chapillon
  • Fonction : Auteur
Laboratoire d'Astrophysique de Bordeaux [Pessac]
Institut de RadioAstronomie Millimétrique
Daniel Díaz-González
  • Fonction : Auteur
Instituto de Radioastronomía y Astrofísica [Mexico]
Manuel Fernández-López
Instituto Argentino de Radioastronomia
Andrés Guzmán
  • Fonction : Auteur
National Astronomical Observatory of Japan
Fabrice Herpin
Laboratoire d'Astrophysique de Bordeaux [Pessac]
Hong-Li Liu
  • Fonction : Auteur
Universidad de Concepción = University of Concepción [Chile]
Yunnan University
Fernando A. Olguin
National Tsing Hua University [Hsinchu]
Allison P. M. Towner
University of Florida [Gainesville]
John Bally
  • Fonction : Auteur
Department of Astrophysical and Planetary Sciences [Boulder]
Cara Battersby
  • Fonction : Auteur
University of Connecticut
Jonathan Braine
  • Fonction : Auteur
Laboratoire d'Astrophysique de Bordeaux [Pessac]
Leonardo Bronfman
Universidad de Chile = University of Chile [Santiago]
H.-R. V. Chen
  • Fonction : Auteur
National Tsing Hua University [Hsinchu]
Pierre Dell'Ova
  • Fonction : Auteur
  • PersonId : 1178690
  • IdRef : 265251524
Astrophysique
James Di Francesco
National Research Council of Canada
Marta González
  • Fonction : Auteur
Institut de Planétologie et d'Astrophysique de Grenoble
Antoine Gusdorf
Astrophysique
Patrick Hennebelle
Astrophysique Interprétation Modélisation
Natsuko Izumi
  • Fonction : Auteur
National Astronomical Observatory of Japan
Ibaraki University
Academia Sinica Institute of Astronomy and Astrophysics
Isabelle Joncour
  • Fonction : Auteur
Institut de Planétologie et d'Astrophysique de Grenoble
Yueh-Ning Lee
National Taiwan Normal University
Bertrand Lefloch
Institut de Planétologie et d'Astrophysique de Grenoble
CV
Pierre Lesaffre
Astrophysique
Xing Lu
Astrophysique Interprétation Modélisation
Karl Menten
Max Planck Institute for Radio Astronomy
Raphaël Mignon-Risse
  • Fonction : Auteur
  • PersonId : 1066063
Astrophysique Interprétation Modélisation
Jordan Molet
  • Fonction : Auteur
Laboratoire d'Astrophysique de Bordeaux [Pessac]
Estelle Moraux
  • Fonction : Auteur
  • PersonId : 840665
Institut de Planétologie et d'Astrophysique de Grenoble
Lee Mundy
  • Fonction : Auteur
University of Maryland [College Park]
Quang Nguyen Luong
  • Fonction : Auteur
  • PersonId : 924167
The American University of Paris
Nastassia Reyes
  • Fonction : Auteur
  • PersonId : 1034634
MARine Biodiversity Exploitation and Conservation - MARBEC
Nicolas Reyes
  • Fonction : Auteur
Max Planck Institute for Radio Astronomy
Universidad de Chile = University of Chile [Santiago]
S. D. Reyes Reyes
  • Fonction : Auteur
Universidad de Concepción = University of Concepción [Chile]
Jean-François Robitaille
Institut de Planétologie et d'Astrophysique de Grenoble
Erik Rosolowsky
University of Alberta
Nicolas Antonio Sandoval-Garrido
  • Fonction : Auteur
Universidad de Concepción = University of Concepción [Chile]
Frédéric Schuller
Max Planck Institute for Radio Astronomy
Leibniz-Institut für Astrophysik Potsdam
Brian E Svoboda
National Radio Astronomy Observatory [Socorro]
Ken'Ichi Tatematsu
  • Fonction : Auteur
National Astronomical Observatory of Japan
Benjamin Thomasson
  • Fonction : Auteur
Institut de Planétologie et d'Astrophysique de Grenoble
Daniel Lewis Walker
  • Fonction : Auteur
University of Connecticut
Benjamin Wu
  • Fonction : Auteur
National Astronomical Observatory of Japan
NVIDIA Research [Austin]
Anthony Whitworth
School of Physics and Astronomy [Cardiff]
Friedrich Wyrowski
  • Fonction : Auteur
Max Planck Institute for Radio Astronomy

Résumé

Aims. Thanks to the high angular resolution, sensitivity, image fidelity, and frequency coverage of ALMA, we aim to improve our understanding of star formation. One of the breakthroughs expected from ALMA, which is the basis of our Cycle 5 ALMA-IMF Large Program, is the question of the origin of the initial mass function (IMF) of stars. Here we present the ALMA-IMF protocluster selection, first results, and scientific prospects.Methods. ALMA-IMF imaged a total noncontiguous area of ~53 pc2, covering extreme, nearby protoclusters of the Milky Way. We observed 15 massive (2.5 −33 × 103 M⊙), nearby (2−5.5 kpc) protoclusters that were selected to span relevant early protocluster evolutionary stages. Our 1.3 and 3 mm observations provide continuum images that are homogeneously sensitive to point-like cores with masses of ~0.2 M⊙ and ~0.6 M⊙, respectively, with a matched spatial resolution of ~2000 au across the sample at both wavelengths. Moreover, with the broad spectral coverage provided by ALMA, we detect lines that probe the ionized and molecular gas, as well as complex molecules. Taken together, these data probe the protocluster structure, kinematics, chemistry, and feedback over scales from clouds to filaments to cores.Results. We classify ALMA-IMF protoclusters as Young (six protoclusters), Intermediate (five protoclusters), or Evolved (four proto-clusters) based on the amount of dense gas in the cloud that has potentially been impacted by H II region(s). The ALMA-IMF catalog contains ~700 cores that span a mass range of ~0.15 M⊙ to ~250 M⊙ at a typical size of ~2100 au. We show that this core sample has no significant distance bias and can be used to build core mass functions (CMFs) at similar physical scales. Significant gas motions, which we highlight here in the G353.41 region, are traced down to core scales and can be used to look for inflowing gas streamers and to quantify the impact of the possible associated core mass growth on the shape of the CMF with time. Our first analysis does not reveal any significant evolution of the matter concentration from clouds to cores (i.e., from 1 pc to 0.01 pc scales) or from the youngest to more evolved protoclusters, indicating that cloud dynamical evolution and stellar feedback have for the moment only had a slight effect on the structure of high-density gas in our sample. Furthermore, the first-look analysis of the line richness toward bright cores indicates that the survey encompasses several tens of hot cores, of which we highlight the most massive in the G351.77 cloud. Their homogeneous characterization can be used to constrain the emerging molecular complexity in protostars of high to intermediate masses.Conclusions. The ALMA-IMF Large Program is uniquely designed to transform our understanding of the IMF origin, taking the effects of cloud characteristics and evolution into account. It will provide the community with an unprecedented database with a high legacy value for protocluster clouds, filaments, cores, hot cores, outflows, inflows, and stellar clusters studies.

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Astrophysique [astro-ph]
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Soumis le : mardi 31 mai 2022-21:41:42

Dernière modification le : jeudi 21 novembre 2024-21:17:25

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hal-03683790 , version 1 (31-05-2022)

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Frédérique Motte, Sylvain Bontemps, Timéa Csengeri, Yohan Pouteau, Fabien Louvet, et al.. ALMA-IMF. I. Investigating the origin of stellar masses: Introduction to the Large Program and first results. Astronomy and Astrophysics - A&A, 2022, 662, pp.A8. ⟨10.1051/0004-6361/202141677⟩. ⟨hal-03683790⟩

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