Only a dozen confirmed FU Orionis-type young out bursting stars (FUors) are known today; this explains the interest in the recent FUor eruption of 2MASS J065931580405277. Its outburst and expected decline will be subject to numerous studies in the future. Almost equally important for the understanding of the eruption mechanism, however, is the physical characterization of the FUors precursor. Here we analyze unpublished archival data and summarize and partly revise all relevant photometry from optical to sub millimeter wavelengths. Our analysis implies that the FUor is possibly associated with eight T Tauri star candidates and a strong Class 0 source. Adopting a distance of 450 pc for the FUor, we derive a quiescent bolometric luminosity and temperature of Lbol = 4.8 L⊙ and Tbol = 1190 K, typical for young Class II sources. The central star has a temperature of Teff = 4000 K, a mass of 0.75M⊙, and an age of about 6 × 105 yr. The SED implies a circumstellar mass of 0.010.06M⊙, and the system is surrounded by a faint infrared nebulosity. Our results provide an almost complete picture of a FUor progenitor, supporting the interpretation of future post-outburst studies.
- stars: individual (2MASS J065931580405277)
- stars: pre-main sequence
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science