Study of the puzzling abundance pattern of the neutron-capture elements in LMC star J053253.51-695915.1

Abstract

Object J053253.51–695915.1 (J053253) in the Large Magellanic Cloud (LMC) is reported as a young stellar object (YSO). Its chemical abundances reflect the initial composition of the gas cloud in which the star formed. However, the discovery that this star shows the enhancement of the neutron(n)-capture elements and the higher ratio of the heavier n-capture elements relative to the lighter n-capture elements is puzzling. Using an abundance decomposed method, we explore the astrophysical origins of the n-capture elements in this star. We find that the abundance characteristic of the higher ratio of the heavier n-capture elements to the lighter n-capture elements can be explained by the pollution of the r-process event and the contamination of the s-process material.