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- W3100183314 abstract "We present a near-infrared (NIR) variability analysis for an 6arcmin $times$ 6arcmin region, which encompasses the massive protocluster G286.21+0.17. The total sample comprises more than 5000 objects, of which 562 show signs of a circumstellar disk based on their infrared colors. The data includes HST observations taken in two epochs separated by 3 years in the F110W and F160W bands. 363 objects (7% of the sample) exhibit NIR variability at a significant level (Stetson index >1.7), and a higher variability fraction (14%) is found for the young stellar objects (YSOs) with disk excesses. We identified 4 high amplitude (>0.6 mag) variables seen in both NIR bands. Follow up and archival observations of the most variable object in this survey (G286.2032+0.1740) reveal a rising light curve over 8 years from 2011 to 2019, with a K band brightening of 3.5 mag. Overall the temporal behavior of G286.2032+0.1740 resembles that of typical FU Ori objects, however its pre-burst luminosity indicates it has a very low mass ($<0.12:M_odot$), making it an extreme case of an outburst event that is still ongoing." @default.
- W3100183314 created "2020-11-23" @default.
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- W3100183314 date "2020-07-01" @default.
- W3100183314 modified "2023-10-16" @default.
- W3100183314 title "Stellar Variability in a Forming Massive Star Cluster" @default.
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- W3100183314 doi "https://doi.org/10.3847/1538-4357/ab93bc" @default.
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