Dynamics and evolution of Young Stellar Clusters (DYSC)

• Grant number: 20/12518-8
• Support Opportunities: Research Grants - Young Investigators Grants
• Start date: October 01, 2021
• End date: September 30, 2027
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Positional Astronomy and Celestial Mechanics
• Principal Investigator: Phillip Andreas Brenner Galli
• Grantee: Phillip Andreas Brenner Galli
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• City of the host institution: São Paulo
• Associated scholarship(s): 25/04917-3 - Dynamical evolution of young stellar clusters with traceback analyses, BP.MS; 24/23182-1 - Detection and classification of young stellar objects with machine learning methods, BP.IC; 23/15776-6 - Searching for young stellar groups with machine-learning methods, BP.IC; + associated scholarships 22/16244-5 - Kinematic properties of the young stellar groups in the Solar neighbourhood, BP.IC; 22/06054-4 - Kinematic properties of the young clusters in the Radcliffe wave, BP.DD; 21/11778-9 - Dynamics and evolution of young stellar clusters (DYSC), BP.JP - associated scholarships

Abstract

For more than a century astronomer used the Gould's Belt model, an expanding ring composed of gas, dust and young stars, to explain the distribution of the most prominent star-forming regions in the Solar neighborhood. The recent discovery of a wave-shaped gaseous structure (i.e., the Radcliffe Wave) that extends by more than 2 kpc and encompasses most of the molecular clouds complexes in the Gould's Belt calls for a revision of the local structure and history of star formation of the Galaxy. Young stellar clusters are the primary laboratories to investigate star and planet formation, thus ideal tracers of galaxy formation and evolution. In this context, the Dynamics and Evolution of Young Stellar Clusters (DYSC) project aims to conduct a systematic survey of young clusters in the Galaxy with the ultimate goal of constructing the most complete 7D picture (3D positions, 3D spatial velocities and age) of the Solar neighborhood. The DYSC project will: (1) deliver a definitive census of the stellar (and substellar) population of young stars that form the Radcliffe Wave and the Local Arm, and potentially discover new stellar groups, (2) investigate the structure, dynamics, evolution and history of star formation of individual young clusters, and (3) connect their properties (spatial distribution, velocity field and age) at a galactic scale. This proposal aims to create a new research group in the host institution that will use the state-of-the-art astrometry delivered by the Gaia satellite and VLBI observations combined with machine-learning methods to deliver novel solutions for unanswered questions in the fields of star formation, Galactic structure and dynamics. (AU)

Scientific publications

(11)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

OLIVARES, J.; MIRET-ROIG, N.; GALLI, P. A. B.; BOUY, H.. Bayesian ages of local young stellar associations: I. Through the expansion rate method. Astronomy & Astrophysics, v. 699, p. 23-pg., 2025-07-04. (20/12518-8)

ORDONEZ-TORO, JAZMIN; DZIB, SERGIO A.; LOINARD, LAURENT; ORTIZ-LEON, GISELA; KOUNKEL, MARINA A.; GALLI, PHILLIP A. B.; MASQUE, JOSEP M.; DUPUY, TRENT J.; QUIROGA-NUNEZ, LUIS H.; RODRIGUEZ, LUIS F.. VLBA detections in the Oph-S1 binary system near periastron confirmation of its orbital elements and mass. Monthly Notices of the Royal Astronomical Society, v. 538, n. 3, p. 5-pg., 2025-03-19. (20/12518-8)

ORDONEZ-TORO, JAZMIN; DZIB, SERGIO A.; LOINARD, LAURENT; ORTIZ-LEON, GISELA; KOUNKEL, MARINA A.; GALLI, PHILLIP A. B.; MASQUE, JOSEP M.; QUIROGA-NUNEZ, LUIS H.; SRINIVASAN, SUNDAR; MEDINA, S. -N. X.; et al. Dynamical mass of the Serpens intermediate-mass young stellar system EC 95 with DYNAMO-VLBA. Monthly Notices of the Royal Astronomical Society, v. 540, n. 3, p. 14-pg., 2025-07-01. (21/11778-9, 20/12518-8)

MIRET-ROIG, N.; ALVES, J.; RATZENBOECK, S.; GALLI, P. A. B.; BOUY, H.; FIGUERAS, F.; GROSSSCHEDL, J.; MEINGAST, S.; POSCH, L.; ROTTENSTEINER, A.; et al. The TW Hydrae Association is a cluster chain of Sco-Cen. Astronomy & Astrophysics, v. 694, p. 15-pg., 2025-02-03. (20/12518-8, 21/11778-9)

OLIVARES, J.; LODIEU, N.; BEJAR, V. J. S.; MARTIN, E. L.; ZERJAL, M.; GALLI, P. A. B.. The cosmic waltz of Coma Berenices and Latyshev 2 (Group X) Membership, phase-space structure, mass, and energy distributions. Astronomy & Astrophysics, v. 675, p. 25-pg., 2023-06-29. (20/12518-8, 21/11778-9)

MIRET-ROIG, N.; GALLI, P. A. B.; OLIVARES, J.; BOUY, H.; ALVES, J.; BARRADO, D.. The star formation history of Upper Scorpius and Ophiuchus A 7D picture: positions, kinematics, and dynamical traceback ages. Astronomy & Astrophysics, v. 667, p. 13-pg., 2022-11-23. (20/12518-8, 21/11778-9)

GALLI, PHILLIP A. B.; MIRET-ROIG, NURIA; BOUY, HERVE; OLIVARES, JAVIER; BARRADO, DAVID. Dynamical age of the Tucana-Horologium young stellar association. Monthly Notices of the Royal Astronomical Society, v. 520, n. 4, p. 11-pg., 2023-02-22. (20/12518-8, 21/11778-9)

RODRIGUES, T.; BOUY, H.; RAYMOND, S. N.; MARTIN, E. L.; BERTIN, E.; OLIVARES, J.; BARRADO, D.; HUELAMO, N.; TAMURA, M.; MIRET ROIG, N.; et al. Disk fraction among free-floating planetary-mass objects in Upper Scorpius. Astronomy & Astrophysics, v. 704, p. 16-pg., 2025-12-01. (20/12518-8)

GALLI, P. A. B.; MIRET-ROIG, N.; BOUY, H.; OLIVARES, J.; BARRADO, D.. Dynamical traceback age of the Octans young stellar association. Astronomy & Astrophysics, v. 689, p. 12-pg., 2024-08-27. (20/12518-8, 21/11778-9)

ORDONEZ-TORO, JAZMIN; DZIB, SERGIO A.; LOINARD, LAURENT; ORTIZ-LEON, GISELA; KOUNKEL, MARINA A.; MASQUE, JOSEP M.; MEDINA, S. -N. X.; GALLI, PHILLIP A. B.; DUPUY, TRENT J.; RODRIGUEZ, LUIS F.; et al. Dynamical Mass of the Ophiuchus Intermediate-mass Stellar System S1 with DYNAMO-VLBA. ASTRONOMICAL JOURNAL, v. 167, n. 3, p. 15-pg., 2024-03-01. (20/12518-8, 21/11778-9)

BOUY, H.; TAMURA, M.; BARRADO, D.; MOTOHARA, K.; CASTRO RODRIGUEZ, N.; MIRET-ROIG, N.; KONISHI, M.; KOYAMA, S.; TAKAHASHI, H.; HUELAMO, N.; et al. Infrared spectroscopy of free-floating planet candidates in Upper Scorpius and Ophiuchus. Astronomy & Astrophysics, v. 664, p. 14-pg., 2022-08-12. (20/12518-8, 21/11778-9)