J/A+A/613/A72 AS1063 and MACS1206-08 datacubes (Girard+, 2018)
KMOS LENsing Survey (KLENS):
Morpho-kinematic analysis of star-forming galaxies at z∼2.
Girard M., Dessauges-Zavadsky M., Schaerer D., Cirasuolo M., Turner O.J.,
Cava A., Rodriguez-Munoz L., Richard J., Perez-Gonzalez P.G.
<Astron. Astrophys. 613, A72 (2018)>
=2018A&A...613A..72G 2018A&A...613A..72G (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Gravitational lensing ; Spectra, infrared
Keywords: galaxies: high-redshift - galaxies: kinematics and dynamics -
galaxies: evolution
Abstract:
We present results from the KMOS LENsing Survey (KLENS), which is
exploiting gravitational lensing to study the kinematics of 24
star-forming galaxies at 1.4<z<3.5 with a median mass of
log(M*/M☉)=9.6 and a median star formation rate (SFR) of
7.5M_☉/yr. We find that 25% of these low mass/low SFR galaxies are
rotation-dominated, while the majority of our sample shows no velocity
gradient. When combining our data with other surveys, we find that the
fraction of rotation-dominated galaxies increases with the stellar
mass, and decreases for galaxies with a positive offset from the main
sequence (higher specific star formation rate). We also investigate
the evolution of the intrinsic velocity dispersion, sigma0, as a
function of the redshift, z, and stellar mass, M*, assuming galaxies
in quasi-equilibrium (Toomre Q parameter equal to 1). From the
z-sigma0 relation, we find that the redshift evolution of the
velocity dispersion is mostly expected for massive galaxies
(log(M*/M☉)>10). We derive a M*-sigma0 relation, using the
Tully-Fisher relation, which highlights that a different evolution
of the velocity dispersion is expected depending on the stellar mass,
with lower velocity dispersions for lower masses, and an increase for
higher masses, stronger at higher redshift. The observed velocity
dispersions from this work and from comparison samples spanning
0<z<3.5 appear to follow this relation, except at higher redshift
(z>2), where we observe higher velocity dispersions for low masses
(log(M*/M☉)∼9.6) and lower velocity dispersions for high masses
(log(M*/M☉)∼10.9) than expected. This discrepancy could, for
instance, suggest that galaxies at high redshift do not satisfy the
stability criterion, or that the adopted parametrization of the
specific star formation rate and molecular properties fail at high
redshift.
Description:
We initiated KLENS in 2015 in P95 with the K band Multi Object
Spectrograph (KMOS; Sharples et al., 2013Msngr.151...21S 2013Msngr.151...21S). KMOS has 24
arms of 14x14-spaxels. Each spaxel has 0.2"x0.2", which gives a
global field of view of 2.8"x2.8" for each arm. Observations were
carried out in the H and K bands, which have a typical spectral
resolution of R∼4000 and R∼4200, respectively. Each pointing had an
exposure time of 300s and we used an object-object-sky-object-object
dither pattern. The sky frames were obtained by applying an offset to
a clear sky position. The observations were taken in good conditions
with a seeing around 0.6" in the H and K bands. The total on-source
exposure time in the H band were 2.3h for both clusters. In the K
band, the targets were observed during 8h and 10h on-source for
MACS1206-08 and AS1063, respectively.
Here are the reduced data fits files of the galaxies presented in
the paper.
Objects:
-------------------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------------------
22 48 54.3 -44 31 07 AS1063 = Abell S1063
12 06 12.2 -08 48 02 MACS1206-08 = MCS J1206.2-0847
-------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 192 26 *List of fits datacubes
fits/* . 26 Indifidual fits datacubes
--------------------------------------------------------------------------------
Note on list.dat: Each fits has an extension for the data and noise.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 21 I2 --- Nx Number of pixels along X-axis
23- 24 I2 --- Ny Number of pixels along Y-axis
26- 29 I4 --- Nz Number of slices
31- 35 F5.3 um blambda [1.425] Lower value of wavelength interval
37- 43 F7.5 um Blambda [1.86678] Upper value of wavelength interval
45- 55 F11.9 um dlambda Resolution
57- 80 A24 --- Obs.date Observation date (YYYY-MM-DDThh:mm:ss.ssss)
82- 85 I4 Kibyte size Size of FITS file
87-122 A36 --- Title Title of the FITS file
124-192 A69 --- FileName Name of FITS file, in subdirectory fits
--------------------------------------------------------------------------------
Acknowledgements:
Marianne Girard, Marianne.Girard(at)unige.ch
Geneva Observatory, Switzerland
(End) M. Girard [Geneva Obs., Switzerland], P. Vannier [CDS] 01-Jun-2018