O papel do ambiente nas propriedades de análogas locais à galáxias de alto redshift

Abstract

The main sequence of star-forming galaxies is a rising trend within an observed group of galaxies, resulting from the relationship between the Star Formation Rate (SFR) and the masses of each object. However, some galaxies deviate from this sequence, and the current literature indicates that, besides mass, the environment can be the determining factor for this behavior. Lyman Break Analogs (LBAs) are galaxies with properties, such as SFR and mass, similar to those at high redshifts but located in the Local Universe. By studying the neighborhood of bright galaxies in the ultraviolet through data from the Sloan Digital Sky Survey (SDSS), we can assess whether the environment plays a role in the observed properties of these objects. From this, it is possible to investigate the environmental density around LBAs to compare their properties with those of other galaxies in the surrounding region with similar characteristics. In this work, to verify the role of the environment in the properties of LBAs, we use the nearest neighbor method to measure the physical density around each galaxy in the selected sample.