Download 3D observations at R~5000

GEPI - L. Chemin
3D spectroscopy
at Paris Obs. (GEPI)
** Euro3D kick-off meeting Jul. 2-4, 2002 **
3D spectroscopy at GEPI
C. Balkowski, V. Cayatte, L. Chemin, H. Flores, F. Hammer
I. Kinematics & Dynamics of nearby galaxies
(in tight collaboration with a Marseille Obs. team)
1- 3D obs. of galaxies vs magnetic field :
ex : NGC 3627
2- 3D observations of galaxies in dense environments :
the case of the Virgo Cluster
ex : NGC 4522 - NGC 4438
II. Kinematics & Dynamics of distant galaxies
with GIRAFFE
** Euro3D kick-off meeting Jul. 2-4, 2002 **
I. Kinematics & Dynamics of Nearby Galaxies :
1- 3D obs. of galaxies vs magnetic field :
(coll. with Urbanik M., Soida M., Chyzy K., Otmianowska-Mazur K.
Astron. Obs. Krakow, Poland)
 Understand the relation between the magnetic field
component and the ionized gas kinematics.
 3D dynamo simulation of B and radio polarization
 example = NGC 3627
** Euro3D kick-off meeting Jul. 2-4, 2002 **
Magnetic field
NGC 3627
FP H velocity field
(cube 256x256x24, FSR=380 km/s, ~1”/pixel)
(Soida et al. 2001)
(Chemin et al. in prep.)
** Euro3D kick-off meeting Jul. 2-4, 2002 **
2- Kinematics & Dynamics of Nearby Galaxies in clusters:
Fabry-Perot H 
survey of Virgo galaxies
C. Balkowski, V. Cayatte, L. Chemin (1)
C. Adami , P. Amram , A. Boselli, J. Boulesteix (2)
J.-L. Gach , O. Garrido, M. Marcelin (2)
B. Vollmer (3) & C. Carignan (4)
1: Observatoire de Paris, GEPI, 92195 Meudon, FRANCE
2: Observatoire Astronomique de Marseille-Provence
2, Place Le Verrier, 13248 Marseille, FRANCE
3: Max-Planck-Institut für Radioastronomie, 53121 Bonn, GERMANY
4: Département de physique, Université de Montréal
Montréal (Québec), CANADA
H3C 3J7
** Euro3D kick-off meeting Jul. 2-4, 2002 **
Scientific justification :
• On-going Fabry-Perot survey
Galaxies having deep H images
(Boselli & Gavazzi 2002)
(Koopman et al. 2001)
Galaxies with perturbed rotation curves (Rubin et al. 1999)
• Compare the gas velocity field with numerical
simulations of ram pressure stripping (eg Vollmer et al. 2001)
 Allow to establish when a galaxy
has passed through the cluster centre
 Test the hypothesis of the
re-accretion of the expelled gas
onto the galaxy disk after stripping
** Euro3D kick-off meeting Jul. 2-4, 2002 **
NGC 4522 (Vollmer et al. 2000)
observations
model
** Euro3D kick-off meeting Jul. 2-4, 2002 **
NGC 4438 (in prep.)
H + [NII] image of NGC 4438
H Velocity Field of NGC 4438
(Kenney & Yale 2002)
(ESO 3.6m tel., obs. 2002/04)
(cube 512x512x40, FSR=490 km/s, ~0.5”/pixel)
** Euro3D kick-off meeting Jul. 2-4, 2002 **
II. Kinematics & Dynamics of Distant Galaxies :
Vogt et al. 1996
1- Context :
 Few tens of rotation curves
 emission lines (Vogt et al. 1996, 1997)
 absorption lines (Kelson et al. 2000)
 Long-slit spectroscopy (Keck Telescope)
 Low spectral res. ( ~ 60 km/s)
 Results :
 rotation curves of distant gal. are similar
to nearby ones
 no change of slope or shape of the
TF-relation vs local TF-rel.
BUT...
** Euro3D kick-off meeting Jul. 2-4, 2002 **
2- Limits :
 slit width 1” (  5kpc at z=0.5)
 slit effect
 “beam-smearing effect”
 seeing
 kinematical parameters
not well determined ?
 slit misalignment vs major axis
 plateau not reached ?
Kinematics at intermediate redshift
needs IFS
** Euro3D kick-off meeting Jul. 2-4, 2002 **
3- GIRAFFE : IFUs & ARGUS modes
We are developping a tool to recover high angular resolution velocity
fields of intermediate redshift galaxies.
2”
N
Illustration of what could be obtained with a HDFS galaxy (z = 0.58
or [OII]3727 at 5888Å) and a warped velocity field model.
** Euro3D kick-off meeting Jul. 2-4, 2002 **
LIR Galaxies detected by ISO
images
5”x5”
** Euro3D kick-off meeting Jul. 2-4, 2002 **
3D spectroscopy with GIRAFFE
Key questions for galaxy evolution :
in field and clusters,
disk, compact galaxies, LIRGs, ULIRGs, ...
 Merging rate vs. redshift
 Tully-Fisher relation and mass of distant galaxies
 Star formation coupled with dynamical evolution
** Euro3D kick-off meeting Jul. 2-4, 2002 **