J/A+A/659/A45 NGC4330 GHASP and PUMA datacubes (Sardaneta+, 2022)
A Virgo Environmental Survey Tracing Ionised Gas Emission (VESTIGE). XI.
Two dimensional Hα kinematics of the edge-on ram pressure stripped
galaxy NGC4330.
Sardaneta M.M., Amram P., Boselli A., Vollmer B., Rosado M.,
Sanchez-Cruces M., Longobardi A., Adami C., Fossati M., Epinat B.,
Boquien M., Cote P., Hensler G., Junais , Plana H., Cuillandre J.C.,
Ferrarese L., Gach J.L., Gomez-Lopez J.A., Gwyn S., Trinchieri G.
<Astron. Astrophys. 659, A45 (2022)>
=2022A&A...659A..45S 2022A&A...659A..45S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Photometry, H-alpha
Keywords: galaxies: clusters: general - galaxies: clusters: individual: Virgo -
galaxies: evolution - galaxies: interactions -
galaxies: kinematics and dynamics
Abstract:
Using the VESTIGE survey, a deep narrow-band Hα imaging survey
of the Virgo cluster carried on at the CFHT with MegaCam, we have
discovered a long and diffuse tail of ionised gas in the edge-on
late-type galaxy NGC4330. This peculiar feature witnesses an ongoing
ram pressure stripping event able to remove the gas in the outer
region of the disc. Tuned hydrodynamic simulations suggest that the
ram pressure stripping event is occurring almost face-on, making
NGC4330 the ideal candidate to study the effects of the perturbation
in the direction perpendicular to the disc plane. We present here two
new independent sets of Fabry-Perot observations (R∼10000) with the
purpose of understanding the effects of ram pressure stripping process
on the kinematics of the ionised gas. Despite their limited
sensitivity to the diffuse gas emission, the data allowed us to
measure the velocity and the velocity dispersion fields over the
galaxy disc and in several features at the edges or outside the
stellar disc formed after the ram pressure stripping event. We have
constructed the position-velocity diagrams and the rotation curves of
the galaxy using three different techniques. The data show, consistent
with the hydrodynamic simulations, that the galaxy has an inner
solid-body rotation up to ∼2.4kpc, with noncircular streaming motions
outwards the disc and in the several external features formed during
the interaction of the galaxy with the surrounding intracluster
medium. The data also indicate a decrease of the rotational velocity
of the gas with increasing distance from the galaxy disc along the
tails, suggesting a gradual but not linear loss of angular momentum in
the stripped gas. Consistent with a ram pressure stripping scenario,
the i-band image shows a boxy shape at the southwest edge of the disc,
where the stellar orbits might have been perturbed by the modification
of the gravitational potential well of the galaxy due to the
displacement of the gas in the z-direction.
Description:
High resolution IFU spectroscopy was obtained using two different FP
interferometers, PUMA attached at the 2.1m telescope at San Pedro
Martir, Baja California, Mexico, and GHASP, mounted on the 1.93m
telescope at the Observatoire de Haute Provence, France.
Objects:
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RA (2000) DE Designation(s)
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12 23 17.25 +11 22 04.7 NGC 4330 = UGC 7456
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 135 2 List of fits datacubes
fits/* . 2 Individual fits datacubes
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See also:
J/A+A/646/A139 : IC 3476 Halpha image (Boselli+, 2021)
J/A+A/650/A99 : NGVS 3543 images at 8 wavelengths (Junais+, 2021)
J/A+A/659/A46 : Halpha imges of 6 lenticular galaxies (Boselli+, 2022)
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 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 29 I2 --- Nz Number of pixels along Z-axis
31- 37 F7.2 m/s bVELOHEL Lower value of heliocentric velocity interval
39- 45 F7.2 m/s BVELOHEL Upper value of heliocentric velocity interval
47- 55 F9.6 m/s dVELOHEL Heliocentric velocity resolution
57- 61 I5 Kibyte size Size of FITS file
63-106 A44 --- FileName Name of FITS file, in subdirectory fits
108-135 A28 --- Title Title of the FITS file
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Acknowledgements:
Philippe Amram, philippe.amram(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
Vollmer 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
Junais et al., Paper X 2021A&A...650A..99J 2021A&A...650A..99J, Cat. J/A+A/650/A99
Boselli et al., Paper XII 2022A&A...659A..46B 2022A&A...659A..46B, Cat. J/A+A/659/A46
(End) Patricia Vannier [CDS] 22-Feb-2022