Search for new stellar sources of gamma-rays

Abstract

Abstract. We review and report about the present status of our search for gamma-ray binaries, microquasars, and new kinds of gamma-ray source associated with star forming regions in the Galaxy. The search is being carried out using cross-identification techniques applied to public databases and archives. A few promising candidates have been so far identified. These include the emission line star VES 737 and the central cluster of the Monoceros R2 star forming region. The observational data supporting the proposed associations is shortly presented and discussed.

Lessons from the apparent peculiar nature of the star TYC 6544‐3483‐1

“…The recent publication of the latest Fermi 4FGL Point Source Catalog (Abdollahi et al 2022) is an important milestone in this context. Although the gamma‐ray sky is mostly dominated by extragalactic blazar sources, other populations of stellar gamma‐ray emitters are also worth studying and searching for (Martí et al 2013). A clear clue that betrays the possible connection of a stellar object with a gamma‐ray source is the detection of non‐thermal radio emission, by means of dedicated observations or catalog cross‐identifications, implying a population of relativistic electrons (Martí et al 2015; Martí & Luque‐Escamilla 2021).…”