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Rapid turn-on of a luminous X-ray source in the candidate Lyman continuum emitting galaxy Tol 0440-381

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arxiv 2201.03138 v1 pith:AB4WIAIN submitted 2022-01-10 astro-ph.HE astro-ph.GA

P. Kaaret , J. Bluem , A.H. Prestwich This is my paper · ORCID
classification astro-ph.HEastro-ph.GA
keywords x-raysourcecandidateemittinggalaxiesgalaxylikelyluminous
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Chandra observations of the nearby, candidate Lyman-continuum (LyC) emitting galaxy Tol 0440-381 show brightening of an X-ray source by at least a factor of 4 to a luminosity of 1.6E40 erg/s over 3.8~days. The X-ray emission likely arises from either a low-luminosity AGN or an ultraluminous X-ray source. The properties of the X-ray source are similar to those found in Haro 11 and Tololo 1247-232, the only other LyC-emitting galaxies that have been resolved in X-rays. All three galaxies host luminous, variable, and hard spectrum X-ray sources that are likely accretion-powered. Accretion onto compact objects produces powerful outflows and ionizing radiation that could help enable LyC escape.

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