Please note that eDoc will be permanently shut down in the first quarter of 2021!      Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ
Home Search Quick Search Advanced Fulltext Browse Collections Persons My eDoc Session History Login Name: Password: Documentation Help Support Wiki Direct access to document ID:	Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents   history ID: 559478.0, MPI für Astronomie / Publikationen_mpia Hier ist wahrhaftig ein Loch im Himmel. The NGC 1999 dark globule is not a globule Authors: 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.; Wilson, T. Date of Publication (YYYY-MM-DD): 2010 Title of Journal: Astronomy and Astrophysics Journal Abbrev.: Astronomy and Astrophysics Volume: 518 Start Page: id.L94 Review Status: not specified Audience: Experts Only Abstract / Description: The NGC 1999 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 μm 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}ȯ. 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}ȯ. 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 NGC 1999 reflection nebula, excavated by protostellar jets from the V 380 Ori multiple system. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASAThis 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 <A href="http://www.aanda.org">http://www.aanda.org</A> Free Keywords: ISM: clouds; ISM: individual objects: NGC 1999; ISM: jets and outflows; infrared: ISM; dust; extinction External Publication Status: published Document Type: Article Communicated by: N. N. Affiliations: MPI für Astronomie Identifiers: URL:http://adsabs.harvard.edu/abs/2010A%26A...518L..94... [ID No:1] The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.