Observational signatures of hot spots orbiting horizonless objects

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Rosa, JL (Author) Other; P. J. V. Garcia (Author) FEUP; Vincent, FH (Author) Other; Cardoso, V (Author) Other

Journal

Title: Physical Review D

Vol. 106

ISSN: 2470-0010

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00X-2Y5

DOI: 10.1103/physrevd.106.044031

Abstract (EN): Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our universe is one of the outstanding fundamental issues that can now be addressed. Here we investigate the ability to discriminate between black holes and compact, horizonless objects, focusing on the lensing of hot spots around compact objects. We work in particular with boson and Proca stars as central objects, and show that the absence of a horizon gives rise to a characteristic feature-photons that plow through the central object and produce an extra image. This feature should be universal for central objects made of matter weakly coupled to the standard model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 19