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High-mass star formation: the mass of the central sources and the physics of the accretion process

Grant number: 17/18191-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2018
Effective date (End): November 19, 2021
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Astrophysics of the Interstellar Medium
Principal researcher:Augusto Damineli Neto
Grantee:Felipe Donizeti Teston Navarete
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:11/51680-6 - Exploring the universe: from the galaxies formation to Earth-like planets with the Giant Magellan Telescope, AP.ESP


High-mass stars play a significant role on the evolution of the Universe and the process that leads to the formation of such objects is still an opened problem in Astrophysics. The details of the structures connected to the central sources, such as the circumstellar disks and the morphology of the jets at their launching points, still lack of observational evidences.We plan to estimate the mass of high-mass young stellar objects (HMYSOs) through the kinematics of the spectral features associated with the circumstellar disks, as well as to investigate the Physics of the accretion process in HMYSOs through the properties of the jets at their launching points.By following Davies et al. (2010), who measured the dynamical mass of the HMYSO W33A in ~10 Msun, we will use IFU observations with high angular resolution (0.050") acquired with the Gemini North telescope to determine the mass of 15 HMYSO candidates exhibiting large-scale jets.The accretion process on HMYSOs will be investigated through millimeter data taken with the ALMA interferometer at high angular and spectral resolution. Based on the ALMA observations, we will be able to investigate the structure of the jets at their launching points (in scales of ~100 AU) and to compare their properties are compatible with those derived at large-scales (~pc).These observations will also provide useful insights about rotation on jets associated with HMYSOs, such as recently found towards the low mass YSO HH 212.

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BEAKLINI, PEDRO P. B.; MENDOZA, EDGAR; CANELO, CARLA M.; ALEMAN, ISABEL; MERELLO, MANUEL; KONG, SHUO; NAVARETE, FELIPE; JANOT-PACHECO, EDUARDO; ABRAHAM, ZULEMA; LEPINE, JACQUES R. D.; DE ALMEIDA, AMAURY A.; FRIACA, AMANCIO C. S. Sulphur-bearing and complex organic molecules in an infrared cold core. Monthly Notices of the Royal Astronomical Society, v. 491, n. 1, p. 427-439, JAN 2020. Web of Science Citations: 0.
NAVARETE, FELIPE; GALLI, PHILLIP A. B.; DAMINELI, AUGUSTO. Gaia-DR2 distance to the W3 Complex in the Perseus Arm. Monthly Notices of the Royal Astronomical Society, v. 487, n. 2, p. 2771-2784, AUG 2019. Web of Science Citations: 1.
DAMINELI, A.; FERNANDEZ-LAJUS, E.; ALMEIDA, L. A.; CORCORAN, M. F.; DAMINELI, D. S. C.; GULL, T. R.; HAMAGUCHI, K.; HILLIER, D. J.; JABLONSKI, F. J.; MADURA, T. I.; MOFFAT, A. F. J.; NAVARETE, F.; RICHARDSON, N. D.; RUIZ, G. F.; SALERNO, N. E.; SCALIA, M. C.; WEIGELT, G. Distinguishing circumstellar from stellar photometric variability in Eta Carinae. Monthly Notices of the Royal Astronomical Society, v. 484, n. 1, p. 1325-1346, MAR 2019. Web of Science Citations: 2.
NAVARETE, F.; LEURINI, S.; GIANNETTI, A.; WYROWSKI, F.; URQUHART, J. S.; KOENIG, C.; CSENGERI, T.; GUESTEN, R.; DAMINELI, A.; MENTEN, K. M. ATLASGAL-selected massive clumps in the inner Galaxy VII. Characterisation of mid-J CO emission. Astronomy & Astrophysics, v. 622, FEB 8 2019. Web of Science Citations: 0.

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