J/MNRAS/514/2769 Emission lines of H II regions in Arp 82 (Karera+, 2022)
The interacting pair of galaxies Arp 82 Integral field spectroscopy and
numerical simulations.
Karera P., Drissen L., Martel H., Iglesias-Paramo J., Vilchez J.M.,
Duc P.-A., Plana H.
<Mon. Not. R. Astron. Soc. 514, 2769-2792 (2022)>
=2022MNRAS.514.2769K 2022MNRAS.514.2769K (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, interacting ; H II regions ; Line Profiles ;
Spectroscopy ; Photometry ; Optical ; Positional data
Keywords: methods: numerical - galaxies: abundances -
galaxies: individual: Arp 82 galaxies: interactions -
galaxies: kinematics and dynamics
Abstract:
Spectral data cubes of the interacting pair of galaxies NGC 2535 and
NGC 2536 (the Arp 82 system) targeting bright emission lines in the
visible band, obtained with the imaging Fourier transform spectrometer
(iFTS) SITELLE attached to the Canada-France-Hawaii Telescope (CFHT),
are presented. Analysis of Hα velocity maps reveals a bar in
NGC2536. In NGC2535, we find strong non-circular motions outside the
ocular ring, in the elliptical arc and tidal tails of NGC2535, and a
misalignment between the kinematic and photometric position angles. We
detect 155 H II region complexes in the interacting pair of galaxies
and determine oxygen abundances for 66 of them using different
calibrators. We find, regardless of the indicator used, that the
oxygen abundance distribution in NGC2536 is shallow, whereas in
NGC2535, it is best fitted by two slopes, the break occurring beyond
the ocular ring. The inner slope is comparable to the one observed in
isolated normal star-forming galaxies, but the outer slope is shallow.
We present a numerical simulation of the interaction that reproduces
the observed tidal features, kinematics, and metallicity distribution,
to investigate the effect of the interaction on the galaxies. The
model indicates that the galaxies have undergone a close encounter,
strongly prograde for the primary, and are halfway in their course to
a second close encounter.
Description:
In this paper, we are aiming to investigate the impact of interactions
on the properties of the ionized gas in the pair of galaxies Arp 82,
an M51-like double system that consists of NGC2535, a galaxy with
grand-design spiral arms and a companion, NGC2536, a galaxy with
grand-design spiral arms and a companion, NGC2536 at the end of one of
the tidal tails. Here, we study the ionized gas properties of Arp 82
using SITELLE data cubes and present a numerical smoothed particle
hydrodynamics (SPH) model of the interacting galaxies. With its large
field of view (11 * 11 arcmin2) andflexible spectral resolution up to
R = 10000 in filter-selected regions of the visible range, the
Canada-France-Hawaii Telescope (CFHT) imaging Fourier transform
spectrometer (iFTS) SITELL At the distance of Arp 82, the instrument
allows a spatial resolution of 215 pc (0.75 arcsec seeing) up to ∼188
kpc from the central galaxies.
Specifically, we observed in 2016 November in three spectral bands
allowing measurements of the strong emission lines. The first filter
for the oxygen doublet [O II] at λλ3727,3729Å, the
second filter for hydrogen line Hβ and oxygen doublet lines [O
III] at λλ4959,5007Å and the third filter for
hydrogen line Hα, nitrogen double lines [N II] at
λλ6548,6583Å and the sulfur double lines at
λλ6716,6731Å. Data reduction was performed using orbs
and orcs SITELLE's dedicated data reduction and analysis pipelines.
Details of the automated procedure and the sources of uncertainties
can be found in Martin et al. (2021MNRAS.505.5514M 2021MNRAS.505.5514M) (i.e section 2).
Next, as explicited in the section 3, we extracted and detected 155
HII regions using the automated hiiphot algorithm applying procedure
on emission line and continuum maps. We present obtained density
fluxes on the tablea1.dat for these 155 HII regions. These results are
used along the study to derive elements abundances on these regions.
Objects:
----------------------------------------------------------------------------
RA (ICRS) DE Designation(s)
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08 11 13.99 +25 12 24.9 APG 82 = [KR2001] G7
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File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 110 155 Positions and fluxes of the H II region
complexes detected in Arp 82 above the
10σ level with HIIphot algorithm
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See also:
J/A+A/559/A114 : Updated O3N2 and N2 abundance indicators (Marino+, 2013)
J/AJ/114/2402 : Rotation curves of early-type galaxies (Courteau+, 1997)
J/ApJS/234/35 : Stellar population synthesis of clumps
(Zaragoza-Cardiel+, 2018)
VI/76 : Simulation Atlas of Tidal Features in Galaxies (Howard+ 1993)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- ID HII region identifier number (ID)
5 I1 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 11 I2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 21 I2 arcsec DEs Declination (J2000)
23- 28 F6.2 10-19W/m2 FOIIl3727 Flux density of the oxygen line [O II]
at λλ3727Å
([OII]λ3727)
30- 34 F5.2 10-19W/m2 e_FOIIl3727 Mean uncertainty of FOIIl3727
(err[OII]λ3727)
36- 41 F6.2 10-19W/m2 FHbeta Flux density of the Hβ line at
4861Å (Hβ)
43- 46 F4.2 10-19W/m2 e_FHbeta Mean uncertainty of FHbeta (errHβ)
48- 53 F6.2 10-19W/m2 FOIIIl5007 Flux density of the oxygen line [O III]
at λλ5007Å
([OIII]λ5007)
55- 58 F4.2 10-19W/m2 e_FOIIIl5007 Mean uncertainty of FOIIIl5007
(err[OIII]λ5007)
60- 65 F6.2 10-19W/m2 FHalpha Flux density of the Hα line at
6562Å (Hα)
67- 71 F5.2 10-19W/m2 e_FHalpha Mean uncertainty of FHalpha
(errHα)
73- 78 F6.2 10-19W/m2 FNIIl6583 Flux density of the nitrogen line
[N II] at λλ6583Å
([NII]λ6583)
80- 84 F5.2 10-19W/m2 e_FNIIl6583 Mean uncertainty of FNIIl6583
(err[NII]λ6583)
86- 91 F6.2 10-19W/m2 FSIIl6716 Flux density of the sulfur line [S II]
at λλ6716Å
([SII]λ6716)
93- 97 F5.2 10-19W/m2 e_FSIIl6716 Mean uncertainty of FSIIl6716
(err[SII]λ6716)
99-104 F6.2 10-19W/m2 FSIIl6731 Flux density of the sulfur line [S II]
at λλ6731Å
([SII]λ6731)
106-110 F5.2 10-19W/m2 e_FSIIl6731 Mean uncertainty of FSIIl6731
(err[SII]λ6731)
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History:
From electronic version of the journal
(End) Luc Trabelsi [CDS] 07-Apr-2025