Gravitational strings. Do we see one?

TL;DR

This paper introduces gravitational strings as flat spacetime singularities similar to cosmic strings, discusses their potential cosmological significance, and suggests CSL-1 as possible evidence for their existence.

Contribution

It proposes gravitational strings as a new class of objects and links them to observable phenomena like CSL-1, expanding the scope of cosmic string research.

Findings

Gravitational strings are flat spacetime singularities similar to cosmic strings.

CSL-1 may be evidence supporting the existence of gravitational strings.

Gravitational strings could have important cosmological implications.

Abstract

I present a class of objects called gravitational strings (GS) for their similarity to the conventional cosmic strings: even though the former are just singularities in flat spacetime, both varieties are equally "realistic", they may play equally important cosmological r\^ole and their lensing properties are akin. I argue that the enigmatic object CSL-1 is an evidence in favor of the existence of GS.