A dataset provided by the European Space Agency

Name AOTVAL_ebergin_2
Title HEXOS: Herschel Observations of Extra-Ordinary Sources: The Orion and Sgr B2 Star-Forming Regions
URL

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DOI 10.5270/esa-h99w8e8
Author bergin, e.
Description As a GT Key Program we propose to perform full HIFI and PACS line surveys of 5 sources in the giant molecular clouds Orion and Sagittarius B2. These extraordinary star-forming regions contain the best studied examples of physical and chemical processes prevalent in the interstellar medium, including gravitational compression, thermal and turbulent pressure support, photodissociation, gas and grain chemistry in dense and diffuse quiescent gas, and shocks. With high excitation, rich chemistry, and large molecular column they give the highest chance for new detections in a sensitive search for new molecules. Line surveys of sources (Orion KL, Orion S, Orion Bar, Sgr B2 N+M) defined by these phenomena form the backbone of this proposed program. Herschel offers unprecedented sensitivity and relative calibration accuracy, as well as continuous spectral coverage across the gaps imposed by the atmosphere, opening up a largely unexplored wavelength regime to high resolution spectroscopy. These data will take line surveys to a new level and we will use them to comprehensively characterize the physics (density, thermal balance, kinematics, radiation field) and chemistry (chemical assay, ionization, deuterium fractionation, water ortho-para ratio) of star-forming molecular gas in a manner not previously possible. The opening of this spectral range is also an opportunity to detect the bending transitions of carbon chains and polycyclic aromatic hydrocarbons, along with the rotational transitions of complex organics. Given that these sources have the richest emission spectra seen for star-forming regions in the Galaxy, we anticipate that the proposed observations will define the sub-millimeter-far infrared region of the spectrum and that these data will form a lasting Herschel legacy.
Publication Exploring the Origins of Earth’s Nitrogen: Astronomical Observations of Nitrogen-bearing Organics in Protostellar Environments . Rice Thomas S. et al. . The Astrophysical Journal, Volume 866, Issue 2, article id. 156, 16 pp. (2018). . 866 . 10.3847\/1538-4357\/aadfdb . 2018ApJ...866..156R ,
Herschel-HIFI spectral line survey of the Orion Bar. Temperature and density differentiation near the PDR surface . Nagy Z. et al. . Astronomy & Astrophysics, Volume 599, id.A22, 24 pp. . 599 . 10.1051\/0004-6361\/201628916 . 2017A&A...599A..22N ,
Spatially extended OH+ emission from the Orion Bar and Ridge . van der Tak F. F. S. et al. . Astronomy & Astrophysics, Volume 560, id.A95, 10 pp. . 560 . 10.1051\/0004-6361\/201322164 . 2013A&A...560A..95V ,
Interstellar bromine abundance is consistent with cometary ices from Rosetta . Ligterink N. F. W. et al. . Astronomy & Astrophysics, Volume 614, id.A112, 8 pp. . 614 . 10.1051\/0004-6361\/201732325 . 2018A&A...614A.112L ,
Structure of photodissociation fronts in star-forming regions revealed by Herschel observations of high-J CO emission lines . Joblin C. et al. . Astronomy & Astrophysics, Volume 615, id.A129, 20 pp. . 615 . 10.1051\/0004-6361\/201832611 . 2018A&A...615A.129J ,
Instrument PACS_PacsCal_WaveCalNoChop_Burst_, PACS_PacsRangeSpec_point, HIFI_HifiFS_fs-freq
Temporal Coverage 2010-04-14T05:11:58Z/2011-04-11T23:02:27Z
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 2011-12-15T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2011-12-15T00:00:00Z, AOTVAL_ebergin_2, SPG v14.2.0. https://doi.org/10.5270/esa-h99w8e8