A selection combining eROSITA X-ray fluxes, Gaia optical colors, and ZTF short-period variability yields 22 accreting compact object binary candidates in eRASS1, two of which are known systems.
X-rays from Quiescent Low-Mass X-ray Binary Transients
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abstract
I argue that it is very unlikely that X-rays from quiescent black-hole low-mass X-ray binary transients are emitted by coronae of companion stars. I show that in a simple model in which these X-rays are emitted by an ADAF filling the inner part of an unsteady, dwarf-nova type disc, the X-ray luminosity is correlated with the orbital period. I predict what values of X-ray luminosities from black-hole transient systems should be observed by Chandra and XMM-Newton.
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Searching for Accreting Compact Object Binaries in SRG/eROSITA eRASS1
A selection combining eROSITA X-ray fluxes, Gaia optical colors, and ZTF short-period variability yields 22 accreting compact object binary candidates in eRASS1, two of which are known systems.