J/A+A/578/A11 Spectrum of QSO XMMC 2028 (Brusa+, 2015)
Evidence for feedback in action from the molecular gas content in the z∼1.6
outflowing QSO XID2028.
Brusa M., Feruglio C., Cresci G., Mainieri V., Sargent M.T., Perna M.,
Santini P., Vito F., Marconi A., Merloni A., Lutz D., Piconcelli E.,
Lanzuisi G., Maiolino R., Rosario D., Daddi E., Bongiorno A., Fiore F.,
Lusso E.
<Astron. Astrophys. 578, A11 (2015)>
=2015A&A...578A..11B 2015A&A...578A..11B
ADC_Keywords: QSOs ; Spectroscopy
Keywords: galaxies: active - galaxies: star formation -
quasars: individual: XID2028 - galaxies: ISM
Abstract:
Gas outflows are believed to play a pivotal role in shaping galaxies,
as they regulate both star formation and black hole growth. Despite
their ubiquitous presence, the origin and the acceleration mechanism
of such powerful and extended winds is not yet understood. Direct
observations of the cold gas component in objects with detected
outflows at other wavelengths are needed to assess the impact of the
outflow on the host galaxy interstellar medium (ISM).
We observed with the Plateau de Bure Interferometer an obscured quasar at z
Gas outflows are believed to play a pivotal role in shaping galaxies,
as they regulate both star formation and black hole growth. Despite
their ubiquitous presence, the origin and the acceleration mechanism
of such powerful and extended winds is not yet understood. Direct
observations of the cold gas component in objects with detected
outflows at other wavelengths are needed to assess the impact of the
outflow on the host galaxy interstellar medium (ISM).
We observed with the Plateau de Bure Interferometer an obscured quasar
at z∼1.5, XID2028, for which the presence of an ionised outflow has
been unambiguously signalled by NIR spectroscopy. The detection of
12CO(3-2) emission in this source allows us to infer the molecular
gas content and compare it to the ISM mass derived from the dust
emission. We then analyze the results in the context of recent
insights on scaling relations, which describe the gas content of the
overall population of star-forming galaxies at a similar redshifts.
Description:
Observations of the CO(3-2) transition of XID2028, redshifted to 2mm,
obtained with the PdBI Interferometer.
Dates of observations: 31-May, 1, 6, June 2014.
XID2028 was observed with receivers tuned to a frequency of 133.37GHz,
corresponding to the expected frequency of the CO(3-2) emission line,
with the PdBI array in the (D) configuration. The continuum is not
detected with a 3σ upper limit on its flux of 0.3mJy.
Objects:
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RA (2000) DE Designation(s)
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10 02 11.27 +01 37 06.6 XID 2028 = XMMC 2028
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 90 XID2028 spectrum in the CO(3-2) transition
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 GHz Freq [132/135] Frequency
13- 21 F9.6 mJy S [-2.2/2.4] Flux density
25- 32 F8.6 mJy e_S [0.9/1.9] Error Flux density
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Acknowledgements:
Marcella Bursa, marcella.brusa3(at)unibo.it
(End) M. Brusa [DIFA, Univ. di Bologna], Patricia Vannier [CDS] 16-Mar-2015