2012ApJ...748L...5R -
Astrophys. J., 748, L5 (2012/March-3)
V900 Mon and Thommes' nebula: a new FUor in Monoceros.
REIPURTH B., ASPIN C. and HERBIG G.H.
Abstract (from CDS):
Detailed observations of a recently recognized eruptive variable, V900 Mon, are presented. The star is located in the small cloud L1656, a little-studied region of modest star formation activity in Monoceros, and is presently at a magnitude of r ∼ 16, surrounded by a bright compact reflection nebula, where only a 20th magnitude star was seen on the red first-epoch POSS plate. Optical spectra show a red absorption-line spectrum not later than mid-K, and the Hα line and the Na I D12 doublet display prominent P Cygni profiles with massive absorption troughs indicating a cool outflowing wind. Near-infrared spectra show deep CO bandhead absorption and pronounced molecular bands of water vapor indicative of a much cooler object. This spectral appearance is very similar to that of FU Orionis, except that V900 Mon has a much higher reddening of AV∼ 13 mag. The energy distribution of V900 Mon, compiled from non-simultaneous observations and thus dependent on possible luminosity changes, shows that V900 Mon is a Class I protostar with a massive cool envelope. At a distance of about 1100 pc, V900 Mon has a luminosity of 106 L☉ in the range of 0.55-160 µm. These data identify V900 Mon as a new member of the rare class of FU Orionis variables.
Abstract Copyright:
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Journal keyword(s):
stars: formation - stars: individual: V900 Mon - stars: low-mass - stars: pre-main sequence - stars: protostars
Nomenclature:
Paragr. 3.1: [RAH2012] L1656-HaN N=3 (Nos 1-3).
Simbad objects:
20
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