SIMBAD references

2015MNRAS.446.4088T - Mon. Not. R. Astron. Soc., 446, 4088-4097 (2015/February-1)

The massive Class I eruptive variable V723 Carinae and its neighbour Car I-125.


Abstract (from CDS):

Near-IR observations from 1993 to 2014 of V723 Carinae confirm this to be a young eruptive variable embedded in the Car I PDR/dust cloud in NGC 3372. In 1993, it was fainter than 16.6 in JHK and went into outburst before 2003, reaching K ≃ 12.9 in 2004. Since then, V723 Car has suffered erratic flux variations of up to ΔK = 2 in time-scales of years. The variations are also evident into the mid-infrared. The H - K index shows correlation with K, though the ratio ΔK/Δ(H - K) differs from that expected from dust extinction. The 1.91 to 2.48 µm spectrum of V723 Car shows emission lines of H2 and also Brγ, as well as 2.3-2.4 µm CO overtone bandheads. The system is extremely red (H - K ≥ 4), with mid- and far-IR colours of a Class I object. The fitted parameters of Robitaille et al.'s model to the 1.6-850 µm spectral energy distribution of V723 Car indicate a system composed of a 10M central star with a 5.6x10–3M disc and a 1.6x103M envelope with AV ∼ 55 of extinction. The total luminosity of the system is about 4x103L. V723 Car is the most luminous, most massive, most deeply embedded, and possibly the youngest of all the young eruptive variables known. Evidence is provided of a 5000 au-long jet of shocked gas extending to opposite sides of the star. The infrared properties of a nearby 10L Class I young stellar object, Car I-125, are also described, with variations in K typical of Herbig Ae/Be stars. Its near-IR spectrum is featureless except for bright Brγ line emission.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): circumstellar matter - stars: formation - infrared: stars

CDS comments: Comparison stars #91, #142 and sources FIR 1 and FIR 2 (Fig.2) are not in Simbad.

Simbad objects: 9

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