J/A+A/650/A99 NGVS 3543 images at 8 wavelengths (Junais+, 2021)
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). X.
Formation of a red ultra-diffuse galaxy and an almost dark galaxy during
a ram-pressure stripping event.
Junais S., Boissier S., Boselli A., Boquien M., Longobardi A., Roehlly Y.,
Amram P., Fossati M., Cuillandre J.-C., Gwyn S., Ferrarese L., Cote P.,
Roediger J., Lim S, Peng E.W.., Hensler G., Trinchieri G., Koda J.,
Prantzos N.
<Astron. Astrophys. 650, A99 (2021)>
=2021A&A...650A..99J 2021A&A...650A..99J (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Optical ; Ultraviolet ; Photometry, H-alpha
Keywords: galaxies: clusters: general - galaxies: clusters: individual: Virgo -
galaxies: evolution - galaxies: interactions -
galaxies: star formation
Abstract:
The interaction of galaxies with their environment plays an important
role in their evolution. Ultra-diffuse galaxies (UDGs) have been found
in large numbers in clusters. We detected a few star forming blobs in
the VESTIGE survey, located at ∼5kpc from a UDG, namely NGVS 3543, in
association with an HI gas cloud AGC 226178, suggesting a recent
interaction of this low surface brightness system with the surrounding
cluster environment.
We use a complete set of multi-frequency data including deep optical,
UV, and narrow- band Hα imaging and HI data to understand the
formation process which gave birth to this peculiar system.
For this purpose, we measured: i) multi-wavelength radial surface
brightness profiles of NGVS 3543 and compared them to the predictions
of spectro-photometric models of galaxy evolution in rich clusters,
ii) aperture photometry of the blue regions in the vicinity of NGVS
3543 in order to determine their age and stellar mass.
The comparison of the observations with the evolutionary models
indicate that the NGVS 3543 has undergone a ram-pressure stripping
(RPS) that peaked ∼100Myr ago, transforming a blue gas-rich UDG into a
red gas-poor UDG. Star formation has taken place in the ram pressure
stripped gas, whose mass is ∼108M☉, forming star complexes of
typical age ∼20Myr and stellar mass ∼104M☉.
These results suggest that we are observing for the first time the
ongoing transformation of a gas-rich UDG into a red and quiescent UDG
under the effect of a ram-pressure stripping event. The same process
could thus explain the lack of star forming UDGs in rich environments
observed in several nearby clusters.
Description:
Eight images of NGVS 3543 are provided in fits format, using the same
pixel scale. The original data are taken from the GUViCS, NGVS and
VESTIGE surveys. Units and calibration are kept as in the standard
products from these survey (i.e. GALEX FUV and NUV, CFHT MegaCam u, g,
i, z and VESTIGE r, narrowband Halpha).
Objects:
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RA (2000) DE Designation(s)
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12 46 41.73 +10 23 10.4 NGVS 3543 = AGC 229166
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 92 8 List of fits images
fits/* . 8 Individual fits images
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See also:
J/A+A/646/A139 : IC 3476 Halpha image (Boselli+, 2021)
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- 24 F5.3 arcsec/pix scale Scale of the image
26- 29 I4 --- Nx Number of pixels along X-axis
31- 34 I4 --- Ny Number of pixels along Y-axis
36- 40 I5 Kibyte size Size of FITS file
42- 58 A17 --- FileName Name of FITS file, in subdirectory fits
60- 92 A33 --- Title Title of the FITS file
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Acknowledgements:
Junais, junais.madathodika(at)lam.fr
References:
Boselli et al., Paper I 2018A&A...614A..56B 2018A&A...614A..56B
Fossati et al., Paper II 2018A&A...614A..57F 2018A&A...614A..57F
Boselli et al., Paper III 2018A&A...615A.114B 2018A&A...615A.114B
Boselli et al., Paper IV 2018A&A...620A.164B 2018A&A...620A.164B
Boselli et al., Paper V 2019A&A...623A..52B 2019A&A...623A..52B
Boselli et al., Paper VI 2020A&A...634L...1B 2020A&A...634L...1B
Longobardi et al., Paper VII 2020A&A...644A.161L 2020A&A...644A.161L
Volmer et al., Paper VIII 2021A&A...645A.121V 2021A&A...645A.121V
Boselli et al., Paper IX 2021A&A...646A.139B 2021A&A...646A.139B, Cat. J/A+A/646/A139
(End) Junais [LAM], Patricia Vannier [CDS] 31-Mar-2021