  Mid-infrared (mid-IR) variability in young stellar objects (YSOs) is driven
by several physical mechanisms, which produce a variety of amplitudes and light
curve shapes. One of these mechanisms, variable disk accretion is predicted by
models of episodic accretion to drive secular variability, including in the
mid-IR. Because the largest accretion bursts are rare, adding new objects to
the YSO eruptive variable class aids our understanding of the episodic
accretion phenomenon and its possible impact on stellar and planetary
formation. A previous analysis of 6.5 yr of NeoWISE light curves (3-5 $\mu$m)
of ~7000 nearby YSOs found an increase in the fraction of variability and
variability amplitude for objects at younger stages of evolution. To help
interpret these light curves, we have obtained low- and high-resolution near-IR
spectra of 78 objects from this sample of YSOs. In this work, we present the
analysis of nine nearby YSOs (d$<$1 kpc) that show the characteristics of known
classes of eruptive variable YSOs. We find one FUor-like source, one EX
Lupi-type object, and six YSOs with mixed characteristics, or V1647 Ori-like
objects. The varied characteristics observed in our sample are consistent with
recent discoveries of eruptive YSOs. We discuss how a wide range in YSO
outburst parameters (central mass, maximum accretion rate during outburst,
evolutionary stage and/or instability leading to the outburst) may play a
significant role in the observed spectro-photometric properties of YSO
outbursts.
