A dataset provided by the European Space Agency

Name OT2_pmaloney_1
Title Water, Molecular Ions, and a Massive Molecular Outflow in Arp 220
URL

http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342257854&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342257855&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342258206&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342258225&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342258226&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262569&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262669&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262670&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262671&instrument_name=HIFI&product_level=LEVEL0&compress=true
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http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262798&instrument_name=HIFI&product_level=LEVEL0&compress=true
http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342262799&instrument_name=HIFI&product_level=LEVEL0&compress=true

DOI https://doi.org/10.5270/esa-6p3jsp1
Author maloney, p.
Description The archetypal ultraluminous infrared galaxy Arp 220 revealed a
remarkably rich spectrum in Herschel SPIRE FTS observations, including
luminous emission from warm CO and water. The spectrum also revealed
the presence of a massive molecular outflow, traced by P Cygni line
profiles in the molecular ions OH+ and H2O+, and possibly
H2O. Comparison of the column densities of these ions relative to
water (and the absence of the ion H3O+) indicated that only an XDR
powered by an X-ray-luminous AGN is capable of explaining the relative
abundances; that these molecular ions are the same species that are
participating in the outflow suggests there may be a connection
between the AGN and the outflow.

Because the FTS did not resolve the lines, only limited information
regarding the outflow and the column densities could be derived from
the saturated lines. To much more accurately characterize both the
physical and chemical state of the gas (in particular the water
chemistry) and the mass and energetics of the outflow, we propose to
obtain HIFI observations of a number of H2O, H2O+, and OH+ emission
and absorption lines (including those exhibiting P Cygni profiles). In
addition, we propose to observe two fairly strong unidentified
emission lines, which fall quite close to the expected frequencies of
the HCN and HCO+ J=6-5 rotation lines. Lower-lying transitions of both
species have been measured from the ground; the apparent velocity
offsets from the expected positions may be the consequence of complex
emission and/or absorption profiles. In the case of HCN, the FTS data
have established that the J=13-12 line and above are seen in
absorption.
Publication
Instrument HIFI_HifiPoint_dbs
Temporal Coverage 2012-12-26T18:22:38Z/2013-02-02T11:41:40Z
Version SPG v14.1.0
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 2013-08-02T10:08:11Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, maloney, p., 2013, OT2_pmaloney_1, SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-6p3jsp1