<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Gaia 17bpi: An FU Ori Type Outburst"^^ . "We report on the source Gaia 17bpi and identify it as a new, ongoing FU Ori–type outburst, associated with a young stellar object. The optical light curve from Gaia exhibited a 3.5 mag rise with the source appearing to plateau in mid-/late 2018. Mid-infrared observations from NEOWISE also show a >3 mag rise that occurred in two stages, with the second one coincident with the optical brightening, and the first one preceding the optical brightening by ~1.5 yr. We model the outburst as having started between October and December of 2014. This wavelength-dependent aspect of young star accretion-driven outbursts has never been documented before. Both the mid-infrared and the optical colors of the object become bluer as the outburst proceeds. Optical spectroscopic characteristics in the outburst phase include: a GK-type absorption spectrum, strong wind/outflow in, e.g., Mgb, NaD, Hα, K I, O I, and Ca II profiles, and detection of Li I 6707 Å. The infrared spectrum in the outburst phase is similar to that of an M-type spectrum, notably exhibiting prominent H_2O and a^(12)CO (2–0) bandhead absorption in the K band, and likely He I wind in the Yband. The new FU Ori source Gaia 17bpi is associated with a little-studied dark cloud in the galactic plane, located at a distance of 1.27 kpc."^^ . "2018-12-20" . . . "869" . "2" . . "American Astronomical Society"^^ . . . "Astrophysical Journal"^^ . . . "15384357" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Dirk"^^ . "Froebrich"^^ . "Dirk Froebrich"^^ . . "Roc M."^^ . "Cutri"^^ . "Roc M. Cutri"^^ . . "Michael A."^^ . "Kuhns"^^ . "Michael A. Kuhns"^^ . . "Carlos Contreras"^^ . "Peña"^^ . "Carlos Contreras Peña"^^ . . "Amy K."^^ . "Mainzer"^^ . "Amy K. Mainzer"^^ . . "Luisa M."^^ . "Rebull"^^ . "Luisa M. Rebull"^^ . . "Lynne A."^^ . "Hillenbrand"^^ . "Lynne A. Hillenbrand"^^ . . "Tim"^^ . "Naylor"^^ . "Tim Naylor"^^ . . "Sam"^^ . "Morrell"^^ . "Sam Morrell"^^ . . "Simon"^^ . "Hodgkin"^^ . "Simon Hodgkin"^^ . . . . . . "Gaia 17bpi: An FU Ori Type Outburst (PDF)"^^ . . . . . "1812.06640.pdf"^^ . . . "Gaia 17bpi: An FU Ori Type Outburst (PDF)"^^ . . . . . "Hillenbrand_2018_ApJ_869_146.pdf"^^ . . "HTML Summary of #91888 \n\nGaia 17bpi: An FU Ori Type Outburst\n\n" . "text/html" . .