J/A+A/679/A89 LBQS0302-0019 NIRSpec spectrum (Perna+, 2023)
GA-NIFS: The ultra-dense, interacting environment of a dual AGN at z ∼ 3.3
revealed by JWST/NIRSpec IFS.
Perna M., Arribas S., Marshall M., D'Eugenio F., Uebler H., Bunker A.,
Charlot S., Carniani S., Jakobsen P., Maiolino R., Rodriguez Del Pino B.,
Willott C.J., Boeker T., Circosta C., Cresci G., Curti M., Husemann B.,
Kumari N., Lamperti I., Perez-Gonzalez P.G., Scholtz J.
<Astron. Astrophys. 679, A89 (2023)>
=2023A&A...679A..89P 2023A&A...679A..89P (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Spectra, infrared
Keywords: quasars: supermassive black holes - quasars: emission lines -
galaxies: high-redshift - galaxies: interactions - galaxies: active -
ISM: jets and outflows
Abstract:
LBQS 0302-0019 is a blue quasar (QSO) at z∼3.3 that hosts powerful
outflows and resides in a complex environment consisting of an
obscured active galactic nucleus (AGN) candidate and multiple
companions, all within 30kpc in projection.
We aim to characterise this complex system using JWST NIRSpec Integral
Field Spectrograph (IFS) observations obtained as part of the NIRSpec
IFS GTO programme 'Galaxy Assembly with NIRSpec IFS' (GA-NIFS); these
data cover the QSO rest-frame optical emission lines with a spatial
resolution of ∼0.1" and a sampling of 0.05' (∼380pc) over a contiguous
sky area of ∼3"x3" (23x23kpc2).
We developed a procedure to correct for the spurious oscillations (or
'wiggles') in NIRSpec single-spaxel spectra caused by the spatial
under-sampling of the point spread function. We performed a QSO-host
decomposition with the QDeblend3D tools. We used multi-component
kinematic decomposition of the optical emission line profiles to infer
the physical properties of the emitting gas in the QSO environment.
The QSO-host decomposition allows us to identify both a low- and a
high-velocity component. The former possibly traces a warm rotating
disk with a dynamical mass Mdyn∼1011M☉ and a
rotation-to-random motion ratio vrot/σ0∼2. The other kinematic
component traces a spatially unresolved ionised outflow with a
velocity of ∼1000km/s and an outflow mass rate of ∼104M☉/yr.
We clearly detect eight companion objects close to LBQS 0302-0019. For
two of them, we detect a regular velocity field that likely traces
rotating gas, and we infer individual dynamical masses of
∼1010M☉. Another companion shows evidence of gravitational
interaction with the QSO host. Optical line ratios confirm the
presence of a second, obscured AGN∼20kpc from the primary QSO; the
dual AGN dominates the ionisation state of the gas in the entire
NIRSpec field of view.
This work has unveiled in unprecedented detail the complex environment
of LBQS 0302-0019, which includes its host galaxy, a close obscured
AGN, and nine interacting companions (five of which were previously
unknown), all within 30kpc of the QSO. Our results support a scenario
where mergers can trigger dual AGN and can be important drivers of
rapid early supermassive black hole growth.
Description:
The file contains the NIRSpec spectrum of the QSO LBQS0302-0019,
integrated over a region of r=1.5-arcsec (orange spectrum in the
paper, Figure 2). Wavelengths are in Angstrom, Fluxes are in
erg/s/cm2/Å. Raw data and reduced data are available for download
(https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html).
The software used to remove the wiggles from the NIRSpec data-cube is
available for download at this link:
https://github.com/micheleperna/JWST-NIRSpec_wiggles
Objects:
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RA (2000) DE Designation(s)
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03 04 49.85 +00 08 13.5 LBQS0302-0019 = [VV2010] J030449.9-000813
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 121 1 Informations of fits spectrum
fits/* . 1 fits spectrum
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 27 I4 --- Nx Number of pixels along X-axis
29- 30 I2 Kibyte size Size of FITS file
32- 89 A58 --- FileName Name of FITS file, in subdirectory fits
91-121 A31 --- Title Title of the FITS file
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Acknowledgements:
Michele Perna, michele.perna(at)inaf.it
(End) Patricia Vannier [CDS] 31-Oct-2023