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Using JVLA data obtained from high-resolution observations at 5.5 GHz atmultiple epochs in 2014 and 2019, we have detected a population of radiovariables and transients in the radio bright zone at the Galactic center. Withobservations covering a sky area of 180 arcmin$^2$ at an angular resolution of0.4 arcsec, we report new detections of 110 Galactic center compact radio(GCCR) sources with a size of $<1$ arcsec. The flux densities of GCCRs exceed70 $\mu$Jy, with at least 10$\sigma$ significance. Among these sources, 82 arevariable or transient and 28 are non-variable. About 10\% of them are expectedto be extragalactic background sources. We discuss the possible astrophysicalnature of the detected sources. As compared to the Galactic disk (GD)population of normal pulsars (NPs) and millisecond pulsars (MSPs), a majority(80\%) of the GCCRs appears to fall within the high flux-density tail of thepulsar distribution, as extrapolated from a sample of NPs in the Galactic disk.However, MSPs extrapolated from the GD population are too weak to havecontributed significantly to the GCCR population that have been detected. Wealso cross-correlated the GCCRs with X-ray sources in Chandra X-ray catalogsand found that 42 GCCRs have candidate X-ray counterparts. Most of the GCCRshaving X-ray counterparts are likely to be associated with unresolved orslightly resolved radio jets launched from X-ray binaries with a compactobject, either a black hole or a neutron star.

A population of compact radio variables and transients in the radio bright zone at the Galactic center observed with the Jansky Very Large Array