Banca de DEFESA: ANDREZA GOMES DA FONSECA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANDREZA GOMES DA FONSECA
DATE: 28/07/2025
TIME: 14:30
LOCAL: on line
TITLE:

EXISTENCE OF DIATOMIC AND TRIATOMIC MOLECULES IN SUNSPOTS

KEY WORDS:

Linear molecules, Spectroscopy, Sunspots.

PAGES: 61
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Química Teórica
SUMMARY:

In this work, we studied the existence of diatomic and triatomic molecules in sunspots based on theoretical and experimental rotovibrational spectra. By comparing the experimental infrared (IR) spectrum of sunspots from 473.5 cm-1 to 925.7 cm-1, we identified bands calculated using harmonic and anharmonic oscillator approximations, rigid and non-rigid rotor, for the following molecules in the ground state: CH, CN, C2-, F2, OH, ScO, VO, MgH, OH, NO, TiO, BH, HF, C2, CO, AlH, HCl, NP, HCN, NO2, OCS, and N2O. To our best knowledge, the NP and C2- molecules have not previously been reported in the literature. In particular, we reinforce the possibility of the existence of CO, CN, CN-, HCN, NP, TiO, F2, and C2- because they present a greater number of bands, respectively, 50, 40, 40, 40, 62, 63, 40, and 45, corresponding to values typical of previously identified molecules. Since C2-, TiO, and CN are paramagnetic, they may be contributing to the larger magnetic field in sunspots compared to the rest of the Sun.

COMMITTEE MEMBERS:
Presidente - CRISTIANO COSTA BASTOS
Interna - ***.999.014-** - JULIANA ANGEIRAS BATISTA DA SILVA - UFPE
Interno - ***.923.004-** - RENALDO TENORIO DE MOURA JUNIOR - UFPE
Externo ao Programa - 384012 - LUCIANO DE AZEVEDO SOARES NETO - UFRPE