A dataset provided by the European Space Agency

Name OT2_jfisch01_1
Title Far-Infrared Full Spectroscopic Signatures of the Massive Molecular Outflows in the (U)LIRGs Mrk 231 and NGC 6240
URL

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DOI https://doi.org/10.5270/esa-2mjrj5n
Author fischer, j.
Description One of the exciting new results of the Herschel mission is the discovery
of massive, high velocity (v virgul 1000 km/sec) molecular outflows in
ultraluminous infrared galaxies (ULIRGs). These outflows, powered by
stellar processes or by AGN, are so far, best traced by radiatively pumped
far-IR OH transitions and are observed in numerous transitions as
P-Cygni, absorption, or emission line profiles. Based on our modeling
of the lines and continuum, the OH observations imply short gas
depletion times, mass loss rates at least several times higher than the
star formation rates, and appear strongest in AGN dominated ULIRGs.
These mergers of gas-rich galaxies have been caught in the act of
dispersing their star-forming molecular fuel as they evolve toward
becoming massive, gas-poor ellipticals! Are these outflows driven by
radio jets or radiation pressure due to a partially buried AGN or are
compact super-starburst winds carving out a view to a previously
hidden AGN? We and others have tuned Herschel PACS spectroscopic
scans to one or more OH lines in surveys of infrared-bright galaxies
to combine with modeling efforts to derive the parameters of these
winds. However, in order to help understand the excitation and
radiative effects producing these winds and thus to better ascertain
the nature of the driving source(s), we propose to fill in the gaps and
thus obtain full PACS spectral scans of two key outflow sources:
Mrk 231, a broad absorption line (BAL) quasar, and NGC 6240, a close
pair of X-ray luminous AGN. The PACS spectral resolution and
sensitivity will enable unprecedented understanding of the outflow
mass-loss rates, energetics, and the radiative environments to which
their ISM is exposed, based on velocity-resolved line profiles of
multiple excited level transitions of OH, H2O, CO, OH+, H2O+, and
oth...er molecules. A key goal of this program is to provide foundations
for the modeling and understanding of the now numerous Herschel
OH outflow surveys of ULIRGs.
Publication Far-infrared Line Spectra of Active Galaxies from the Herschel/PACS Spectrometer: The Complete Database . Fernández-Ontiveros Juan Antonio et al. . The Astrophysical Journal Supplement Series, Volume 226, Issue 2, article id. 19, 26 pp. (2016). . 226 . 10.3847\/0067-0049\/226\/2\/19 . 2016ApJS..226...19F ,
Measuring chemical abundances in AGN from infrared nebular lines: HII-CHI-MISTRY-IR for AGN . Pérez-Díaz Borja et al. . Astronomy and Astrophysics . null . null . 2022A&A...666A.115P ,
Importance of radiative pumping for the excitation of the H2O submillimeter lines in galaxies . González-Alfonso Eduardo et al. . Astronomy and Astrophysics . null . null . 2022A&A...666L...3G ,
Instrument PACS_PacsRangeSpec_point
Temporal Coverage 2012-09-25T04:36:26Z/2012-10-16T14:49:29Z
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/h®erschel/
Date Published 2013-04-16T14:07:39Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, fischer, j., 2013, OT2_jfisch01_1, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-2mjrj5n