Audrey Saltzman, a senior at Byram Hills High School in Armonk, has been named one of 40 finalists across the country in the prestigious Regeneron Science Talent Search for her studies of a neutron star 19,000 light-years from Earth, Tarrytown-based Regeneron recently announced. With the honor, she receives an all-expenses-paid trip to Washington D.C. for the final round of the competition, where the young scholars will compete for a top prize of $250,000.