An All-Sky Search For R Coronae Borealis Stars in ASAS-SN

TL;DR

This paper reports the discovery of 19 new R Coronae Borealis and DY Per candidates using the ASAS-SN survey, combining IR selection and light curve analysis to identify these rare variable stars.

Contribution

The study introduces a new method combining IR color selection and light curve inspection to identify RCB stars in all-sky survey data, expanding the known population.

Findings

Discovered 19 new RCB and DY Per candidates.

Validated IR and light curve selection approach.

Enhanced understanding of RCB star distribution.

Abstract

We report the discovery of 19 new R Coronae Borealis (RCB) star and DY Per candidates with light curves from the All-Sky Automated Survey for Supernovae (ASAS-SN). We examined both an existing set of 1602 near/mid-IR selected candidates and an additional 2615 candidates selected to have near/mid-IR SEDs consistent with those of known R Coronae Borealis stars. We visually inspected the light curves for the characteristic variability of these systems.