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2000MNRAS.313..663G - Mon. Not. R. Astron. Soc., 313, 663-670 (2000/April-3)
Discovery of a dense bipolar outflow from a new class 0 protostar in NGC 2068/LBS 17.
GIBB A.G. and LITTLE L.T.
Abstract (from CDS):
A map of C18O J=2⟶1 emission traces the LBS 17 core and follows the ambient HCO+ emission reasonably well, with the exception of the direction towards LBS 17-H where there is a significant anticorrelation between the C18O and HCO+. A comparison of beam-matched C18O and dust-derived H2 column densities suggests that CO is depleted by up to a factor of ∼50 at this position if the temperature is as low as 9K, although the difference is substantially reduced if the temperature is as high as 20K. Chemical models of collapsing clouds can account for this discrepancy in terms of different rates of depletion on to dust grains for CO and HCO+.
LBS 17-H has a previously known water maser coincident with it but there are no known near-infrared, IRAS or radio continuum sources associated with this object, leading to the conclusion that it is probably very young. A greybody fit to the continuum data gives a luminosity of only 1.7L☉ and a submillimetre-to-bolometric luminosity ratio of 0.1, comfortably satisfying the criteria for classification as a class 0 protostar candidate.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): stars: formation - ISM: clouds - ISM: individual: NGC 2068 - ISM: jets and outflows - ISM: molecules - radio lines: ISM
CDS comments: LBS 17 = LBS 2-17, LBS 17-H = NAME NGC 2068 H2O MASER = [GLH95] LBS 17 B8.
Simbad objects: 17
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