J/A+A/606/L11 MUSE observations SBS 0335-052E (Herenz+, 2017)
VLT/MUSE illuminates possible channels for Lyman continuum escape in the halo
of SBS 0335-52E.
Herenz E.C., Hayes M., Papaderos P., Cannon J.M., Bik A., Melinder J.,
Ostlin G.
<Astron. Astrophys., 606, L11 (2017)>
=2017A&A...606L..11H 2017A&A...606L..11H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Optical
Keywords: galaxies: starburst - galaxies: halos -
galaxies: individual: SBS 0335-052E - techniques: imaging spectroscopy
Abstract:
We report on the discovery of ionised gas filaments in the
circum-galactic halo of the extremely metal-poor compact starburst SBS
0335-052E in a 1.5h integration with the MUSE integral-field
spectrograph. We detect these features in Hα and [OIII] emission
down to a limiting surface-brightness of
5x10-19erg/s/cm2/arcsec2. The filaments have projected diameters
of 2.1kpc and extend more than 9kpc to the north and north-west from
the main stellar body. We also detect extended nebular HeII
λ4686 emission that brightens towards the north-west at the rim
of a starburst driven super-shell. We also present a velocity field of
the ionised gas. The filaments appear to connect seamlessly in
velocity space to the kinematical disturbances caused by the shell.
Similar to high-z star-forming galaxies, the ionised gas in this
galaxy is dispersion dominated. We argue that the filaments were
created via feedback from the starburst and that these ionised
structures in the halo may act as escape channels for Lyman continuum
radiation in this gas-rich system.
Description:
We here provide fully reduced MUSE data for SBS 0335-052E. This
reduction is significantly improved with respect to a standard ESO
pipeline reduction, as we used an iterative process to not
oversubtract emission from the extended emission line halo of this
blue compact dwarf galaxy. We further provide continuum subtracted
narrow-band images in Hα, [OIII], and HeII that were created
from the MUSE data. Moreover, this data release also contains the
line-of-sight velocity field as obtained from Ha from this galaxy.
Objects:
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RA (2000) DE Designation(s)
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03 37 44.04 -05 02 40.2 SBS 0335-052E = SBSG 0335-052E
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 113 5 List of fits files
fits/* . 5 Individual fits files
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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 slices for the datacube
37- 43 I7 Kibyte size Size of FITS file
45- 74 A30 --- FileName Name of FITS file, in subdirectory fits
76-113 A38 --- Title Title of the FITS file (1)
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Note (1): The MUSE datacube FITS file contains 3 header-data units (HDUs):
HDU 1: Header summarising basic observational parameters.
HDU 2: Flux density datacube in 1*10-20erg/s/cm2/Angstrom
HDU 3: Variance datacube in 1*10-40(erg/s/cm2/Angstrom)2
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Acknowledgements:
Edmund Christian Herenz, eherenz(at)eso.org
(End) Patricia Vannier [CDS] 26-Oct-2020