J/A+A/635/A157 QSO J1538+0855 MUSE datacube (Travascio+, 2020)
The WISSH quasars project. VIII. Outflows and metals in the circum-galactic
medium around the hyper-luminous z∼3.6 quasar J1538+08.
Travascio A., Zappacosta L., Cantalupo S., Piconcelli E.,
Arrigoni Battaia F., Ginolfi M., Bischetti M., Vietri G., Bongiorno A.,
D'Odorico V., Duras F., Feruglio C., Vignali C., Fiore F.
<Astron. Astrophys. 635, A157 (2020)>
=2020A&A...635A.157T 2020A&A...635A.157T (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; QSOs ; Optical
Keywords: galaxies: active - quasars: individual: SDSS J153830.55+085517.0 -
galaxies: high-redshift - intergalactic medium -
quasars: emission lines
Abstract:
In recent years, Lyα nebulae have been routinely detected around
high redshift, radio-quiet quasars thanks to the advent of the highly
sensitive integral field spectrographs. Constraining the physical
properties of the Lyα nebulae is crucial for a full
understanding of the circum-galactic medium (CGM). The CGM acts both
as a repository for intergalactic and galactic baryons as well as a
venue of feeding and feedback processes. The most luminous quasars are
privileged test-beds to study these processes, given their large
ionising fluxes and dense CGM environments in which they are expected
to be embedded.We aim to characterise the rest-frame ultraviolet (UV)
emission lines in the CGM around a hyper-luminous, broad emission
line, radio-quiet quasar at z∼3.6, which exhibits powerful outflows at
both nuclear and host galaxy scales.We analyse VLT/MUSE observations
of the quasar J1538+08 (Lbol=6*1047erg/s), and we performed a search
for extended UV emission lines to characterise its morphology,
emissivity, kinematics, and metal content.We report the discovery of a
very luminous (2*1044erg/s), giant (150kpc) Lyα nebula and a
likely associated extended (75kpc) CIV nebula. The Lyα nebula
emission exhibits moderate blueshift (440km/s) compared to the quasar
systemic redshift and a large average velocity dispersion (700km/s)
across the nebula, while the CIV nebula shows average velocity
dispersion of 350km/s. The Lyα line profile exhibits a
significant asymmetry towards negative velocity values at 20-30kpc
south of the quasar and is well parametrised by the following two
Gaussian components: a narrow (470km/s) systemic one plus a broad
(1200km/s), blueshifted (1500km/s) one. Our analysis of the MUSE
observation of J1538+08 reveals metal-enriched CGM around this
hyper-luminous quasar. Furthermore, our detection of blueshifted
emission in the emission profile of the Lyα nebula suggests that
powerful nuclear outflows can propagate through the CGM over tens of
kiloparsecs.
Description:
MUSE datacube of the hyper-luminous QSO J1538+08.
Objects:
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RA (2000) DE Designation(s)
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15 38 30.59 +08 55 18.0 QSO J1538+0855 = SDSS J153830.55+085517.0
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 105 1 Information on datacube
fits/* . 1 Datacube
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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- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 F3.1 arcsec/pix scale Scale of the image
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 35 I4 --- Nz Number of pixels along Z-axis
37- 42 F6.1 0.1nm blambda Lower value of wavelength interval
44- 49 F6.1 0.1nm Blambda Upper value of wavelength interval
51- 54 F4.2 0.1nm dlambda Wavelength resolution
56- 62 I7 Kibyte size Size of FITS file
64- 73 A10 --- FileName Name of FITS file, in subdirectory fits
75-105 A31 --- Title Title of the FITS file
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History:
From Andrea Travascio, andrea.travascio(at)inaf.it
Acknowledgements:
LZ, EP acknowledge financial support under ASI/INAF contract
2017-14-H.0. FF, EP, AB and CF acknowledge financial support from
PRIN-INAF-2016 FORECAST.This research has made use of the NASA/IPAC
Extragalactic Database (NED), which is operated by the Jet Propulsion
Laboratory, California Institute of Technology, under contract with
the National Aeronautics and Space Administration. SC gratefully
acknowledges support from Swiss National Science Foundation grant
PP00P2_163824.
(End) Andrea Travascio [INAF-OAR, Italy], Patricia Vannier [CDS] 11-Mar-2020