J/A+A/677/A143 Angular momentum in MAGIC. I. Environment (Mercier+, 2023)
Stellar angular momentum of disk galaxies at z ≃ 0.7 in the MAGIC survey.
I. Impact of the environment.
Mercier W., Epinat B., Contini T., Krajnovic D., Ciesla L., Lemaux B.C.,
Abril-Melgarejo V., Boogaard L., Pelliccia D.
<Astron. Astrophys. 677, A143 (2023)>
=2023A&A...677A.143M 2023A&A...677A.143M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxy catalogs ; Galaxies, rotation ; Models ;
Velocity dispersion ; Surveys ; Optical
Keywords: galaxies: evolution - galaxies: kinematics and dynamics -
galaxies: clusters: general - galaxies: groups: general -
galaxies: high-redshift - galaxies: fundamental parameters
Abstract:
At intermediate redshift, galaxy groups/clusters are thought to impact
galaxy properties such as their angular momentum. We investigate
whether the environment has an impact on the galaxies' stellar
angular momentum and identify underlying driving physical mechanisms.
We derive robust estimates of the stellar angular momentum using
Hubble Space Telescope (HST) images combined with spatially resolved
ionised gas kinematics from the Multi-Unit Spectroscopic Explorer
(MUSE) for a sample of ∼200 galaxies in groups and in the field at
z∼0.7 drawn from the MAGIC survey. Using various environmental
tracers, we study the position of the galaxies in the the angular
momentum-stellar mass (Fall) relation as a function of environment.
We measure a 0.12dex (2σ significant) depletion of stellar
angular momentum for low-mass galaxies (M*<1010M☉) located in
groups with respect to the field. Massive galaxies located in dense
environments have less angular momentum than expected from the
low-mass Fall relation but, without a comparable field sample, we
cannot infer whether this effect is mass- or environmentally-driven.
Furthermore, these massive galaxies are found in the central parts of
the structures and have low systemic velocities. The observed
depletion of angular momentum at low stellar mass does not appear
linked with the strength of the over-density around the galaxies but
it is strongly correlated with (i) the systemic velocity of the
galaxies normalised by the dispersion of their host group and (ii)
their ionised gas velocity dispersion.
Galaxies in groups appear depleted in angular momentum, especially at
low stellar mass. Our results suggest that this depletion might be
induced by physical mechanisms that scale with the systemic velocity
of the galaxies (e.g. stripping or merging) and that such mechanism
might be responsible for enhancing the velocity dispersion of the gas
as galaxies lose angular momentum.
Description:
This catalogue contains various information, including the ID of the
galaxies (using the convention retained for the publication of the
survey paper, see Epinat et al. in prep.), their position, environment
characteristics, as well as their stellar mass, and various stellar
angular momentum estimates. This catalogue can be cross-matched with
the survey paper catalogue and with the morpho-kinematics catalogue
published in Mercier et al. (2022A&A...665A..54M 2022A&A...665A..54M, Cat. J/A+A/665/A54)
using the ID column or the RA, DEC coordinates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 233 182 Parameters for the kinematics sample
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See also:
J/A+A/665/A54 : MAGIC morpho-kinematics MS catalogue (Mercier+, 2022)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID MUSE galaxy ID (1)
12- 25 F14.12 --- z Spectroscopic systemic redshift derived
from kinematics
27- 48 F22.18 deg RAdeg Right Ascension of morphological centre
(J2000)
50- 69 F20.18 deg DEdeg Declination of morphological centre
(J2000)
71- 73 I3 --- N ?=-99 Richness (i.e. number of galaxies)
in the structure the galaxy belongs to
75- 90 F16.12 --- R/R200 ?=-99 Ratio of the projected distance of
a galaxy to its host group's centre with
its host group's radius.
Field galaxies have a value of -99
92-107 F16.12 --- dV/sigma ?=-99 Ratio of the systemic velocity of
the galaxy along the line-of-sight with
its host group's velocity dispersion.
Field galaxies have a value of -99
109-124 F16.12 --- Eta ?=-99 Environmental tracer combining
R/R200 and dV/sigma
126-140 F15.12 --- logOverDens Log10 of the over-density around galaxies
as measured by the VMC technique
142-155 F14.12 [kpc.km/s] logjHSTMM Log10 of the specific stellar angular
momentum derived from HST images and a
mass model rotation curve
157-170 F14.12 [kpc.km/s] logjHSTflat Log10 of the specific stellar angular
momentum derived from HST images and a
flat model rotation curve
172-185 F14.12 [kpc.km/s] logjexpMM Log10 of the specific stellar angular
momentum derived from an exponential
mass distribution and a mass model
rotation curve
187-200 F14.12 [kpc.km/s] logjexpflat Log10 of the specific stellar angular
momentum derived from an exponential
mass distribution and a flat model
rotation curve
202-217 F16.12 km/s GasDisp Average ionised gas dispersion with LSF
and beam-smearing corrections applied
219-233 F15.12 [Msun] logM* Stellar mass within R22=2.2*Rd,
with Rd the stellar disk scale length
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Note (1): IDs are in the form X-CGrY, where X refers to the galaxy
identification number within the field targeting COSMOS group CGrY
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History:
From Wilfried Mercier, wilfried.mercier(at)lam.fr
Acknowledgements:
We dedicate this article in memory of Hayley Finley.
We acknowledge David Carton for his investment in the build-up of the
project.
This work was supported by the Programme National Cosmology et Galaxies
(PNCG) of CNRS/INSU with INP and IN2P3, cofunded by CEA and CNES.
This work has been carried out through the support of the ANR FOGHAR
(ANR-13-BS05-0010-02), the OCEVU Labex (ANR-11- LABX-0060), and the
A*MIDEX project (ANR-11-IDEX-0001-02), which are funded by the
'Investissements d'avenir' French government program managed by the ANR.
This work has been carried out thanks to the support of the Ministry of
Science, Technology and Innovation of Colombia (MINCIENCIAS) PhD
fellowship program No. 756-2016.
(End) Wilfried Mercier [LAM], Patricia Vannier [CDS] 28-Jul-2023