SIMBAD references

2010A&A...518L..94S - Astronomy and Astrophysics, volume 518, L94-94 (2010/7-2)

Hier ist wahrhaftig ein Loch im Himmel. The NGC 1999 dark globule is not a globule.

STANKE T., STUTZ A.M., TOBIN J.J., ALI B., MEGEATH S.T., KRAUSE O., LINZ H., ALLEN L., BERGIN E., CALVET N., DI FRANCESCO J., FISCHER W.J., FURLAN E., HARTMANN L., HENNING T., MANOJ P., MARET S., MUZEROLLE J., MYERS P.C., NEUFELD D., OSORIO M., PONTOPPIDAN K., POTEET C.A., WATSON D.M. and WILSON T.

Abstract (from CDS):

The NGC1999 reflection nebula features a dark patch with a size of ∼10000AU, which has been interpreted as a small, dense foreground globule and possible site of imminent star formation. We present Herschel PACS far-infrared 70 and 160µm maps, which reveal a flux deficit at the location of the globule. We estimate the globule mass needed to produce such an absorption feature to be a few tenths to a few M. Inspired by this Herschel observation, we obtained APEX LABOCA and SABOCA submillimeter continuum maps, and Magellan PANIC near-infrared images of the region. We do not detect a submillimer source at the location of the Herschel flux decrement; furthermore our observations place an upper limit on the mass of the globule of ∼2.4x10–2M. Indeed, the submillimeter maps appear to show a flux depression as well. Furthermore, the near-infrared images detect faint background stars that are less affected by extinction inside the dark patch than in its surroundings. We suggest that the dark patch is in fact a hole or cavity in the material producing the NGC1999 reflection nebula, excavated by protostellar jets from the V380 Ori multiple system.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: individual objects: NGC 1999 - ISM: jets and outflows - infrared: ISM - dust, extinction

Nomenclature: Fig. 2, Fig. A.1: HOPS NNN (Nos 166, 168, 171, 203, 362). Fig. 3, Table B.1: [SST2010] N (Nos 1-5). Fig. 1-2, Fig. A.1: NAME HH 147 IR.

Simbad objects: 22

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2021.01.16-23:31:16

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