This is the 3775th most frequent Spanish word.
reconocidos
Recognized.
Here, 'reconocidos' is an adjective describing the authors, meaning they are acknowledged or renowned for their work.
Los autores reconocidos han sido premiados internacionalmente.
The recognized authors have been internationally awarded.
In this sentence, 'reconocieron' is a form of the verb 'reconocer' in preterite, meaning to identify or acknowledge someone or something.
Ellos se reconocieron en medio de la multitud.
They recognized each other in the middle of the crowd.
Here, 'reconocidos' is the past participle of the verb 'reconocer', indicating that the achievements received acknowledgment.