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We present radio light curves and spectra of the classical nova V1723 Aqlobtained with the Expanded Very Large Array (EVLA). This is the first paper toshowcase results from the EVLA Nova Project, which comprises a team ofobservers and theorists utilizing the greatly enhanced sensitivity andfrequency coverage of EVLA radio observations, along with observations at otherwavelengths, to reach a deeper understanding of the energetics, morphology, andtemporal characteristics of nova explosions. Our observations of V1723 Aql span1-37 GHz in frequency, and we report on data from 14-175 days following thetime of the nova explosion. The broad frequency coverage and frequentmonitoring show that the radio behavior of V1723 Aql does not follow theclassic Hubble-flow model of homologous spherically expanding thermal ejecta.The spectra are always at least partially optically thin, and the flux rises onfaster timescales than can be reproduced with linear expansion. Therefore, anydescription of the underlying physical processes must go beyond this simplepicture. The unusual spectral properties and light curve evolution might beexplained by multiple emitting regions or shocked material. Indeed, X-rayobservations from Swift reveal that shocks are likely present.

EVLA Nova Project Observations of the Classical Nova V1723 Aquilae