Research Interests
– Active Galactic Nuclei and Galaxy Evolution
– Populations of dwarf galaxy in clusters and Groupst
– Environments of luminous high-redshift quasars
– Large Scale Structure formation and evolution
– Quasars environment in the reionization epoch
Projects
Stellar population of HI-detected galaxies in the Fornax cluster
HI-detected galaxies in the Fornax cluster host diverse stellar populations, revealing insights into their star formation histories and evolutionary paths. Studying these galaxies helps trace how gas content influences stellar growth and the transformation of galaxies in dense cluster environments.
Hot DOGs as Tracers of Dense Cosmic Environments
In this project, we investigated the large-scale environments of hyperluminous, dust-obscured quasars, known as Hot DOGs, to better understand how massive structures formed in the early Universe. Using deep optical imaging, we identified significant overdensities of Lyman-break galaxy candidates surrounding Hot DOGs, revealing that these extremely luminous quasars reside in the densest regions at high redshift. These findings show that Hot DOGs represent powerful tracers of early cosmic overdensities and provide important insights into the assembly and evolution of massive galaxies and protoclusters.
Inside–Out Assembly and the Role of AGN in Galaxy Evolution
We studied more than 48,000 massive galaxies in the local Universe to characterize their physical properties and to better understand inside–out growth and its connection to active galactic nuclei (AGN) activity. Following the results of Pérez et al. (2013), who showed that galaxies with stellar masses in the range log(M⋆/M⊙) = 10.73–11.03 assembled their central regions significantly earlier and faster than their outskirts, we selected our sample based on this mass range and call it Inside-Out Assembled Galaxy (IOAG) candidates. We found that most IOAG candidates host AGN or exhibit nuclear activity, and the majority are located below the star-forming main sequence, indicating ongoing quenching. Our results suggest that AGN activity plays a significant role in suppressing central star formation before morphological transformation occurs, from the blue cloud to the quiescent red sequence.