A dataset provided by the European Space Agency

Name OT1_nschneid_1
Title Pillars of creation: physical origin and connection to star formation
URL

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DOI 10.5270/esa-v7mpbfi
Author schneider, n.
Description Herschel SPIRE-PACS photometry observations performed within the HOBYS (Herschel imaging survey of OB Young Stellar objects) key program have revealed a wealth of interesting structures in high-mass star forming regions. The most spectacular of those are .pillars. and .globules.. These features -- partly known from Hubble Space telescope or Spitzer images -- are formed due to photoevaporation at the interface between a molecular cloud and an HII region, and are thus intimately linked to high-mass star formation. The process of how these pillars are created, and under which conditions low- or high-mass stars form within them, are not yet clear. Classical approaches (e.g. Rayleigh-Taylor) can not explain pillar formation, so we have embarked upon a dedicated project to fully simulate pillars and globules using the (magneto)-hydrodynamic code HERACLES that comprises gravity and ionization. The model is intended to be coupled with a radiative transfer photon dominated region code (KOSMA-tau). We propose here to make use of the Herschel spectroscopy capacities to map-make single pointings, in a number of atomic and molecular lines, of selected pillars and globules in three different regions (Rosette, Cygnus, M16), spanning a large range in UV intensity and density. We intend to observe the important cooling lines of [CII] at 158 micron and [OI] at 63 and 145 micron with PACS, the [CI] finestructure lines at 370 and 609 micron and the mid-to high-J CO and HCO+ ladder with the SPIRE FTS. Spectrally resolved [CII] mapping with HIFI is also required to derive the velocity information. These observations will be compared to the large existing complementary data set for each source, to study the physics of pillars and will additionally serve as input for the models, to ultimately explain pillar formation and star formation within them.
Publication Globules and pillars seen in the [CII] 158 μm line with SOFIA . Schneider N. et al. . Astronomy & Astrophysics, Volume 542, id.L18, 6 pp. . 542 . 10.1051\/0004-6361\/201218917 . 2012A&A...542L..18S ,
Instrument SPIRE_SpireSpectrometer_, PACS_PacsRangeSpec_point, HIFI_HifiMapping_load-raster, HIFI_HifiMapping_fly, PACS_PacsRangeSpec_large
Temporal Coverage 2010-12-14T13:18:54Z/2012-05-25T14:06:47Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-11-25T12:03:57Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-11-25T12:03:57Z, OT1_nschneid_1, SPG v14.2.0. https://doi.org/10.5270/esa-v7mpbfi