Studying the disk of the outbursting new FU Orionis object 2MASSJ0659
Abstract
A new outbursting young stellar object of the rare FU Orionis type -- 2MASSJ06593158-0405277 -- was discovered in Nov 2014. These objects represent the extreme case of the episodic accretion during the star formation process, with accretion rates rising by factors of 100 to 1000 up to 10^-4 M_sun/yr, leading to a brightening of the source by more than a factor 100 in the optical within several months. With a DDT proposal for FORCAST and FIFI-LS we were able to obtain MIR and FIR photometry of the object in Jan/Feb 2015, while the outburst was still on its rise. This is the first time that MIR and FIR photometry are available for such a source from before the outburst (WISE, AKARI) and during the rising burst. FU Ori objects then typically take decades for a very slow decline from their maximum brightness back to the original state. Therefore we are requesting to repeat our FORCAST and FIFI-LS observations (45 min each) now to derive the spectral energy distribution of the source, while it should be in its maximum state. This constitutes an unprecedented dataset to learn more about where in the circumstellar disk such a burst starts, how it is triggered, and what its implications for planet formation may be.
- Publication:
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SOFIA Proposal
- Pub Date:
- October 2015
- Bibcode:
- 2015sofi.prop...29E
- Keywords:
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- SOFIA 04_0029