J/A+A/670/A121 SBS0335+052 high level MUSE and VLA B data (Herenz+, 2023)
A ∼15 kpc outflow cone piercing through the halo of the blue compact metal-poor
galaxy SBS 0335-052E.
Herenz E.C., Inoue J., Salas H., Koenigs B., Moya-Sierralta C.,
Cannon J.M., Hayes M., Papaderos P., Oestlin G., Bik A., Le Reste A.,
Kusakabe H., Monreal-Ibero A., Puschnig J.
<Astron. Astrophys. 670, A121 (2023)>
=2023A&A...670A.121H 2023A&A...670A.121H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Optical ; Radio lines
Keywords: galaxies: starburst - galaxies: haloes -
galaxies: individual: SBS 0335-052E - ISM: jets and outflows
Abstract:
Outflows from low-mass star-forming galaxies are a fundamental
ingredient for models of galaxy evolution and cosmology. Despite
seemingly favourable conditions for outflow formation in compact
starbursting galaxies, convincing observational evidence for kpc-scale
outflows in such systems is scarce.
The onset of kpc-scale ionised filaments in the halo of the metal-poor
compact dwarf SBS 0335-052E was previously not linked to an outflow.
We here we investigate whether these filaments provide evidence for an
outflow.
We obtained new VLT/MUSE WFM and deep NRAO/VLA B-configuration 21cm
data of the galaxy. The MUSE data provide morphology, kinematics, and
emission line ratios Hβ/Hα and [OIII]λ5007/Hα
of the low surface-brightness filaments, while the VLA data deliver
morphology and kinematics of the neutral gas in and around the system.
Both datasets are used in concert for comparisons between the ionised
and the neutral phase.
We report the prolongation of a lacy filamentary ionised structure up
to a projected distance of 16kpc at
SB(Hα)=1.5x10-18erg/s/cm2/arcsec2. The filaments exhibit
unusual low Hα/Hβ~=2.4 and low [OIII]
λ5007/Hα∼0.4-0.6. They are spectrally narrow (∼20km/s)
and exhibit no velocity sub-structure. The filaments extend outwards
of the elongated HI halo. On small scales the N(HI) peak is offset
from the main star-forming sites. Morphology and kinematics of HI and
HII reveal how star-formation driven feedback interacts differently
with the ionised and the neutral phase.
We reason that the filaments are a large-scale manifestation of
star-formation driven feedback, namely limb-brightened edges of a
giant outflow cone that protrudes through the halo of this gas-rich
system. A simple toy model of such a conical structure is found to be
commensurable with the observations.
Description:
With this publication we release high-level reduced data from the ESO
VLT/MUSE and VLA B-configuration observations. The observations are
described in Sect. 2 and the reductions are described in Sect. 3 of
the paper.
The observational raw data and the associated calibrations are stored
in the ESO (programme IDs 096.B-0690 and 0104.B-0834) and in the NRAO
data archives for the MUSE and VLA data (project ID 17B-234),
respectively.
The FITS file SBS0335DATACUBEFINAL.fits is the data product from
reducing MUSE observations with the MUSE DRS pipeline (Weilbacher et
al., 2020A&A...641A..28W 2020A&A...641A..28W). It contains three HDUs. The primary HDU 1
carries no data, but includes standard ESO metadata describing the
observations. HDUs 2 and 3 contain the flux datacube and the
corresponding variances.
The FITS file SBS0335R0.5AMTnoUVgoldeneye.fits is the data product
from the CASA reductions (The CASA team et al., 2022PASP..134k4501C 2022PASP..134k4501C)
where no UV tapering has been applied, whereas for the FITS file
SBS0335R0.5AMT7kUVgoldeneye.fits UV tapering at 7kλ was
used in the imaging process.
Objects:
----------------------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------------------
03 37 44.04 -05 02 40.2 SBSG 0335-052E = [PBT2001] SBSG 0335-052 E
----------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 248 3 List of fits datacubes
fits/* . 3 Individual fits datacubes
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See also:
J/ApJ/734/82 : NIR spectroscopy of five dwarf galaxies (Izotov+, 2011)
J/A+A/561/A49 : 867um image of SBS 0335-052 with ALMA (Hunt+, 2014)
J/A+A/606/L11 : MUSE observations SBS 0335-052E (Herenz+, 2017)
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- 27 I4 --- Nx Number of pixels along X-axis
29- 32 I4 --- Ny Number of pixels along Y-axis
34- 37 I4 --- Nz Number of slices
39- 61 A23 "datime" Obs.date Observation date
63- 69 F7.2 0.1nm blambda ? Lower value of wavelength interval
71- 77 F7.2 0.1nm Blambda ? Upper value of wavelength interval
79- 82 F4.2 0.1nm dlambda ? Wavelength resolution
84- 90 F7.2 km/s bVopt ? Lower value of optical velocity interval
92- 98 F7.2 km/s BVopt ? Upper value of optical velocity interval
100-106 F7.4 km/s dVopt ? Optical velocity resolution
108-114 I7 Kibyte size Size of FITS file
116-151 A36 --- FileName Name of FITS file, in subdirectory fits
153-248 A96 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Edmund Christian Herenz, eherenz(at)eso.org
References:
Weilbacher et al., 2020A&A...641A..28W 2020A&A...641A..28W,
The data processing pipeline for the MUSE instrument.
CASA Team et al., 2022PASP..134k4501C 2022PASP..134k4501C ,
CASA, the Common Astronomy Software Applications for Radio Astronomy
(End) Patricia Vannier [CDS] 09-Jan-2023