Kavli Affiliate: Gregory Herczeg
| First 5 Authors: Geumsook Park, Doug Johnstone, Carlos Contreras Pena, Jeong-Eun Lee, Sheng-Yuan Liu
| Summary:
We present a comprehensive analysis of young stellar object (YSO) variability
within the M17 Southwest Extension (M17 SWex), using 3.5 years of monitoring
data from the JCMT Transient Survey at sub-millimeter (sub-mm) and 9 years from
the NEOWISE mission at mid-infrared (mid-IR). Our study encompasses
observations of 147 bright sub-mm peaks identified within our deep JCMT
co-added map as well as 156 YSOs in NEOWISE W1 and 179 in W2 that were
previously identified in Spitzer surveys. We find three robust sub-mm
variables: two are candidate YSOs and one is a likely extragalactic source. At
mid-IR wavelengths, our analysis reveals secular and stochastic variability in
47 YSOs, with the highest fraction of secular variability occurring at the
earliest evolutionary stage. This is similar to what has previously been
observed for low-mass YSO variability within the Gould Belt. However, we
observe less overall variability in M17SWex at both the sub-mm and mid-IR. We
suspect that this lower fraction is due to the greater distance to M17 SWex.
Our findings showcase the utility of multi-wavelength observations to better
capture the complex variability phenomena inherent to star formation processes
and demonstrate the importance of years-long monitoring of a diverse selection
of star-forming environments.
| Search Query: ArXiv Query: search_query=au:”Gregory Herczeg”&id_list=&start=0&max_results=3