Graduate student at Johns Hopkins University, USA
Davidsen Fellow at Space Telescope Science Institute, USA
MsC in Astrophysics at Universidad de Guanajuato, México
Physicist at Universidad Industrial de Santander, Colombia
RESEARCH INTEREST
I am currently working and studying atmospheric variability in brown dwarfs of spectral types L to T. I use data from HST, JWST, and terrestrial telescopes to understand the variability and the physical mechanisms that generate it. We also want to compare our results with synthetic spectra generated by computational models and with retrievals such as Brewster and PICASO.
Drivers of Spectroscopic Variability: Heterogenous clouds and chemical instabilities
We used time-resolved NIRSpec data of WISE 1049AB (the brighter and closest variable binary system). We study the variability across ten molecular bands (H$_2$O, CH$_4$, and CO), revealing wavelength-dependent light curves influenced mainly by patchy clouds and chemical disequilibrium. The study provides the first qualitative representation of a three-dimensional atmospheric map constructed from molecular band contributions at different pressure levels. This work offers the first observational evidence of CO/CH_4 disequilibrium chemistry in the atmospheres of L/T transition brown dwarfs.
Supervisors:
Informed and Systematic Method to Identify Variable brown dwarfs
Master Thesis | Modeling of brown dwarf atmospheres
We seek to reproduce the spectral variability we observe, with theoretical models, to understand the physics of brown dwarf atmospheres, and to confirm the spectral index method designed in Ashraf et al. (2022) and Oliveros-Gomez et al. (2022).
Supervisors:
PhD. Dennis Jack
Undergraduate thesis | binary star system
In the framework of my undergraduate thesis in physics, the columnar mass density at different atmospheric heights of the chromosphere of the giant star of the binary system Zeta Aurigae was calculated. Its variations in the last chromospheric eclipse of autumn 2019 were analyzed, and the results were compared with old eclipses of this system (+70 years of observations).
Supervisors:
Dr. Klaus-Peter Schröder
Publications
An Informed and Systematic Method to Identify Variable mid-L dwarfs
Submitted
Natalia Oliveros-Gomez , Elena Manjavacas, Daniella C. Bardalez-Gagliuffi, Johanna M. Vos, Jacqueline K. Faherty, Theodora Karalidi