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Hier ist wahrhaftig ein Loch im Himmel: The NGC1999 dark globule is not a globule

Stanke, T. and Ali, B. and Pontoppidan, K. (2010) Hier ist wahrhaftig ein Loch im Himmel: The NGC1999 dark globule is not a globule. Astronomy and Astrophysics, 518 . Art. No. L94. ISSN 0004-6361.

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The NGC1999 reflection nebula features a dark patch with a size of ~10 000 AU, 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 160 μmmaps, 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 ~2.4×10^(−2) M_⊙. 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.

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Pontoppidan, K.0000-0001-7552-1562
Additional Information:© 2010 ESO. Received 31 March 2010, Accepted 3 May 2010, Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. This publication includes data acquired with the Atacama Pathfinder Experiment (APEX; proposal E-082.F-9807 and E-284.C- 5015). APEX is a collaboration between the Max-Planck-Institut für Radioastronomie, the European Southern Observatory, and the Onsala Space Observatory. This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile. Appendices A and B are only available in electronic form at We thank Frank Bertoldi and Markus Albrecht for their invaluable help with BOA, Giorgio Siringo for his help with the SABOCA data, Jonathan Williams for encouraging discussions, and the APEX staff for their help wiht taking the data. Based in part on observations made with Herschel, a European Space Agency Cornerstone Mission with significant participation by NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. J.J.T. acknowledges funding through HST-GO-11548.04- A. Figure 1 produced from data taken with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA).
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Hubble Space TelescopeUNSPECIFIED
Subject Keywords:ISM: clouds, ISM: individual objects: NGC 1999, ISM: jets and outflows, infrared: ISM, dust, extinction
Record Number:CaltechAUTHORS:20101203-095336899
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Official Citation:Hier ist wahrhaftig ein Loch im Himmel - The NGC 1999 dark globule is not a globule T. Stanke, A. M. Stutz, J. J. Tobin, B. Ali, S. T. Megeath, O. Krause, H. Linz, L. Allen, E. Bergin, N. Calvet, J. Di Francesco, W. J. Fischer, E. Furlan, L. Hartmann, T. Henning, P. Manoj, S. Maret, J. Muzerolle, P. C. Myers, D. Neufeld, M. Osorio, K. Pontoppidan, C. A. Poteet, D. M. Watson and T. Wilson A&A 518 L94 (2010) DOI: 10.1051/0004-6361/201014612
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21146
Deposited By: Benjamin Perez
Deposited On:03 Dec 2010 18:24
Last Modified:03 Oct 2019 02:20

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