Project A3

Project leaders: Labadie, Lucas (PH1); Peißker, Florian (PH1)

The observational project A3 aims at exploiting high-angular resolution observations at infrared (e.g., VLT, VLTI, JWST) and sub-millimeter (ALMA) wavelengths to explore the interplay between massive stars and their habitats at the ~100-1000 AU scale. Different environmental conditions (e.g., super- to sub-solar metallicity) may influence the conditions of massive star formation and evolution, therefore we consider comparing observations in diverse regions such as the Galactic Center, galactic stellar clusters or the low-metallicity Magellanic Clouds.  We will focus on the inflow/outflow properties (e.g., stellar accretion, stellar winds) of matter onto and from massive stars using gas tracers (He I, He II, Br, H2) and we will explore the impact of stellar multiplicity.

In this thesis, we will first use data from the VLT and ALMA to study the multiplicity status in selected massive galactic clusters at a few kpc distance. We plan to perform follow-up studies of high-mass YSO (YSO) candidates in the Nuclear Star Cluster of the Galactic Center region, and attempt the mapping of winds/outflows from massive stars in the Large Magellanic Cloud (LMC) using first VLTI (Very Large Telescope) interferometric observations. These observational inputs can then be used in advanced simulations (e.g. A5)  to better understand the connection between the different scales explored in the CRC.

References

  1. Caratti o Garatti, Fedriani, Garcia Lopez, Koutoulaki, Perraut, Linz, and 6 co-authors including, and Labadie, “The GRAVITY young stellar object survey. II. First spatially resolved observations of the CO bandhead emission in a high-mass YSO”, A&A 635, L12 (2020).
  2. Eupen, Labadie, Grellmann, Perraut, Brandner, Duchêne, and Köhler, “The GRAVITY young stellar object survey. V. The orbit of the T Tauri binary star WW Cha”, A&A 648, A37 (2021).
  3. Ganci, Labadie, Klarmann, de Valon, Perraut, Benisty, and et al., “The GRAVITY young stellar object survey. VIII. Gas and dust faint inner rings in the hybrid disk of HD141569”, A&A 655, A112 (2021).
  4. Gustafsson, Labadie, Herbst, and Kasper, “Spatially resolved H2 emission from the disk around T Tau N”, A&A 488, 235 (2008).
  5. Peißker, Zajacˇek, Eckart, Sabha, Shahzamanian, and Parsa, “New bow-shock source with bipolar morphology in the vicinity of Sgr A*”, A&A 624, A97 (2019).
  6. Peißker, Ali, Zajacˇek, Eckart, Hosseini, Karas, Clénet, Sabha, et al., “First Observed Interaction of the Circumstellar Envelope of an S-star with the Environment of Sgr A*”, ApJ 909, 62 (2021).
  7. Peißker, Eckart, Sabha, Zajacˇek, and Bhat, “Near- and Mid-infrared Observations in the Inner Tenth of a Parsec of the Galactic Center Detection of Proper Motion of a Filament Very Close to Sgr A*”, ApJ 897, 28 (2020).
  8. Peißker, Hosseini, Zajacˇek, Eckart, Saalfeld, Valencia-S., and Parsa, “Monitoring dusty sources in the vicinity of Sagittarius A*”, A&A 634, A35 (2020).
  9. Taha, Labadie, Pantin, Matter, Alvarez, Esquej, Grellmann, Rebolo, et al., “The spatial extent of poly- cyclic aromatic hydrocarbons emission in the Herbig star HD 179218”, A&A 612, A15 (2018).
  10. Wojtczak, Labadie, Perraut, Tessore, Soulain, and Ganci, “The GRAVITY young stellar object survey. IX. Spatially resolved kinematics of hot hydrogen gas in the star/disk interaction region of T Tauri stars”, A&A in press (2022).