J/A+A/630/A59 ALMA continuum-subtracted datacubes for 48 QSOs (Bischetti+, 2019)
Widespread presence of QSO-driven outflows in the early Universe.
Bischetti M., Maiolino R., Carniani S., Fiore F., Piconcelli E., Fluetsch A.
<Astron. Astrophys. 630, A59 (2019)>
=2019A&A...630A..59B 2019A&A...630A..59B (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Radio sources
Keywords: galaxies: active - galaxies: high-redshift - galaxies: nuclei -
quasars: emission lines - quasars: general -
techniques: interferometric
Abstract:
We present the stacking analysis of a sample of 48 quasi-stellar
objects (QSOs) at 4.5<z<7.1 detected by the Atacama Large Millimetre
Array (ALMA) in the [CII] λ158um emission line to investigate
the presence and the properties of massive, cold outflows associated
with broad wings in the [CII] profile. The high sensitivity reached
through this analysis allows us to reveal very broad [CII] wings
tracing the presence of outflows with velocities in excess of
1000km/s. We find that the luminosity of the broad [CII] emission
increases with LAGN, while it does not significantly depend on the
star formation rate of the host galaxy, indicating that the central
active galactic nucleus (AGN) is the main driving mechanism of the
[CII] outflows in these powerful, distant QSOs. From the stack of the
ALMA cubes, we derive an average outflow spatial extent of ∼3.5kpc.
The average atomic neutral mass outflow rate inferred from the stack
of the whole sample is dMout/dt∼100M☉/yr, while for the most
luminous systems it increases to ∼200M☉/yr. The associated
outflow kinetic power is about 0.1% of LAGN, while the outflow
momentum rate is ∼LAGN/c or lower, suggesting that these outflows
are either driven by radiation pressure onto dusty clouds or,
alternatively, are driven by the nuclear wind and energy conserving
but with low coupling with the interstellar medium. We discuss the
implications of the resulting feedback effect on galaxy evolution in
the early Universe.
Description:
In our work we collected archival ALMA data for a sample of 48 quasars
at 4.5<z<7.1 detected in the [CII] λ158um emission line. Here we
collect the ALMA data cubes of the ALMA spectral window containing
[CII], that is a spectral range of ∼1.875GHz. In these data cubes
continuum emission has been subtracted according to Sect. 2 of the
manuscript.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 156 48 List of fits datacubes
fits/* . 48 Individual fits datacubes
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 30 I3 --- Nz Number of slices
32- 57 A26 "datime" Obs.date Observation date
59- 65 F7.3 GHz bFREQ Lower value of frequency interval
67- 73 F7.3 GHz BFREQ Upper value of frequency interval
75- 81 F7.4 MHz dFREQ Frequency resolution
83- 88 I6 Kibyte size Size of FITS file
90-112 A23 --- FileName Name of FITS file, in subdirectory fits
114-156 A43 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Manuela Bischetti, manuela.bischetti(at)inaf.it
(End) Patricia Vannier [CDS] 10-Sep-2019