The Intermediate-mass Young Stellar Object 08576nr292: Discovery of a disk-jet system

نویسندگان

  • L. E. Ellerbroek
  • L. Kaper
  • A. Bik
  • A. de Koter
  • M. Horrobin
  • E. Puga
چکیده

We present observations of the embedded massive young stellar object (YSO) candidate 08576nr292, obtained with X-shooter and SINFONI on the ESO Very Large Telescope (VLT). The flux-calibrated, medium-resolution X-shooter spectrum (300 – 2500 nm) includes over 370 emission lines, but no (photospheric) absorption lines and is consistent with a reddened disk spectrum. Among the emission lines are three hydrogen series and helium lines, both permitted and forbidden metal lines, and CO first-overtone emission. A representative sample of lines with different morphologies is presented. The Hα and Ca II triplet lines are very strong, with profiles indicative of outflow and – possibly – infall, usually observed in accreting stars. These lines include a blue-shifted absorption component at ∼−125 km s−1. The He I and metal-line profiles are double-peaked, with a most likely origin in a circumstellar disk. The forbidden lines, associated

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تاریخ انتشار 2017