Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 800, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/800/1/L5
Keywords
circumstellar matter; infrared: stars; stars: formation; stars: protostars
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Funding
- National Aeronautics and Space Administration (NASA) through Jet Propulsion Laboratory, California Institute of Technology (JPL/Caltech)
- NASA
- NASA Postdoctoral Program at Goddard Space Flight Center
- Deutsche Forschungsgemeinschaft priority program 1573 (Physics of the Interstellar Medium)
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We report the dramatic mid-infrared brightening between 2004 and 2006 of Herschel Orion Protostar Survey (HOPS) 383, a deeply embedded protostar adjacent to NGC 1977 in Orion. By 2008, the source became a factor of 35 brighter at 24 mu m with a brightness increase also apparent at 4.5 mu m. The outburst is also detected in the submillimeter by comparing APEX/SABOCA to SCUBA data, and a scattered-light nebula appeared in NEWFIRM K-s imaging. The post-outburst spectral energy distribution indicates a Class 0 source with a dense envelope and a luminosity between 6 and 14 L-circle dot Post-outburst time-series mid-and far-infrared photometry show no long-term fading and variability at the 18% level between 2009 and 2012. HOPS 383 is the first outbursting Class 0 object discovered, pointing to the importance of episodic accretion at early stages in the star formation process. Its dramatic rise and lack of fading over a 6 year period hint that it may be similar to FU Ori outbursts, although the luminosity appears to be significantly smaller than the canonical luminosities of such objects.
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