A dataset provided by the European Space Agency

Name DDT_egonza01_5
Title Far-Universe follow-up of Herschel.s discovery of Massive Molecular Outflows and
Negative Feedback in ULIRGs: the OH 34 micron Doublet in APM 08279+5255 at z=3.9


DOI https://doi.org/10.5270/esa-h7j7pll
Author European Space Agency
Description Using the PACS spectroscopic range mode, we propose to follow-up one of the
most exciting discoveries of the Herschel mission: strong negative feedback
in massive molecular outflows as traced by the OH molecule. Here we propose,
for the first time in the far-Universe, to perform a sensitive observation in
the ground-state OH 34 micron doublet in APM 08279+5255, a gravitationally
lensed, radio quiet, broad absorption line (BAL) quasar at z=3.91.
There is reason to believe that this source may be a scaled up version
similar to local ULIRGs such as Mrk 231, with an apparent bolometric
luminosity of L virgul 7 x 10^15 Lo: it is over three orders of magnitude more
luminous than Mrk 231-, and with highly luminous radiatively pumped far-IR
emission lines of H2O. The OH 34 micron line will be red-shifted to 170
microns in a sensitive PACS spectral region and will be observed in absorption
against the extraordinarily strong rest-frame mid-IR continuum emission close
to the peak of the quasar SED. It will provide the opportunity to study the
extreme luminosity end of the feedback phenomenon in ULIRGs. By scaling the
OH 34 micron absorption derived from our outflow models of the Herschel
observations of Mrk 231 to the continuum level of APM 08279+5255, we estimate
that 11.0 hours of observing time will be enough to detect the line with
5-sigma confidence; nevertheless, a stronger signal may be detected given the
extraordinary properties of the source. If so, this will allow for velocity
characterization of the flow. To our knowledge, this will be the first attempt
to observe molecular outflows in hyper-ULIRGs in the early Universe and to
test the current paradigm of negative feedback at the high end of the
luminosity scale.
Instrument PACS_PacsRangeSpec_point
Temporal Coverage 2012-10-22T01:29:10Z/2012-10-22T12:24:53Z
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 2013-04-22T01:29:10Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013, Far-Universe Follow-Up Of Herschel.S Discovery Of Massive Molecular Outflows And
Negative Feedback In Ulirgs: The Oh 34 Micron Doublet In Apm 08279+5255 At Z=3.9, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-h7j7pll