Circumstellar emission from T Tauri stars

• Grant number: 25/21801-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2025
• End date: October 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Stellar Astrophysics
• Principal Investigator: Jane Cristina Gregorio-Hetem
• Grantee: Thomaz Dean Bailona Cotrim
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 25/13344-7 - Circumstellar emission from T Tauri stars, AP.R

Abstract

The goal of this project is to study the spectral energy distribution (SED) of T Tauri stars, which are low-mass objects (<2 M_¿) in the Pre-Main Sequence (PSP) phase, aiming to estimate stellar and circumstellar parameters using optical and infrared photometry. We will analyze published data on T Tauri stars observed during the Pico dos Dias Survey (PDS, Gregorio-Hetem et al. 1992), measuring colors in different photometric bands to confirm the spectral type and construct the SED for comparison with synthetic spectra. The characterization of the star's circumstellar structure will be performed using infrared photometry, which allows for the evaluation of excess of dust emission due to the presence of a circumstellar disk. The sample characterization will be complemented by the use of data from the Gaia DR3 catalog to estimate the star's distance with high precision.