Search Publications
The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set
Sullivan, M.; Lidman, C.; Aldering, G. +39 more
We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degr…
The cosmic infrared background resolved by Spitzer. Contributions of mid-infrared galaxies to the far-infrared background
Le Floc'h, E.; Dole, H.; Lagache, G. +7 more
Aims.We quantify the contributions of 24 µm galaxies to the Far-Infrared (FIR) Background at 70 and 160 µm. We provide new estimates of the Cosmic Infrared Background (CIB), and compare it with the Cosmic Optical Background (COB).
Methods: .Using Spitzer data at 24, 70 and 160 µm in three deep fields, we stacked more than 190…
The Galaxy mass function up to z =4 in the GOODS-MUSIC sample: into the epoch of formation of massive galaxies
Pentericci, L.; Fontana, A.; Vanzella, E. +10 more
Aims.The goal of this work is to measure the evolution of the Galaxy Stellar Mass Function and of the resulting Stellar Mass Density up to redshift ≃4, in order to study the assembly of massive galaxies in the high redshift Universe.
Methods: .We have used the GOODS-MUSIC catalog, containing 3000 Ks-selected galaxies with multi-wavelength cov…
The GOODS-MUSIC sample: a multicolour catalog of near-IR selected galaxies in the GOODS-South field
Fontana, A.; Vanzella, E.; Grazian, A. +6 more
Aims. We present a high quality multiwavelength (from 0.3 to 8.0 µm) catalog of the large and deep area in the GOODS Southern Field covered by the deep near-IR observations obtained with the ESO VLT. Methods. The catalog is entirely based on public data: in our analysis, we have included the F435W, F606W, F775W and F850LP ACS images, the JHK…
The soft X-ray/NLR connection: a single photoionized medium?
Bianchi, S.; Guainazzi, M.; Chiaberge, M.
We present a sample of 8 nearby Seyfert 2 galaxies observed by HST and Chandra. All of the sources present soft X-ray emission which is coincident in extension and overall morphology with the [O iii] emission. The spectral analysis reveals that the soft X-ray emission of all the objects is likely to be dominated by a photoionized gas. This is stro…
The great observatories origins deep survey. VLT/FORS2 spectroscopy in the GOODS-South Field: Part II
Popesso, P.; Cesarsky, C.; Stern, D. +16 more
Aims.We present the second campaign of the ESO/GOODS program of spectroscopy of faint galaxies in the GOODS-South field.
Methods: .Objects were selected as candidates for VLT/FORS2 observations primarily based on the expectation that the detection and measurement of their spectral features would benefit from the high throughput and spectral re…
3D spectroscopy with VLT/GIRAFFE. I. The true Tully Fisher relationship at z ∼ 0.6
Flores, H.; Hammer, F.; Puech, M. +2 more
A precise derivation of the evolution of the Tully Fisher is crucial to understand the interplay between dark matter and baryonic matter in cosmological models, using 15 deployable integral field units of FLAMES/GIRAFFE at VLT, we have recovered the velocity fields of 35 galaxies at intermediate redshift (0.4 < z < 0.75). This facility is ab…
Ground-based CCD astrometry with wide field imagers. I. Observations just a few years apart allow decontamination of field objects from members in two globular clusters
Anderson, J.; Bedin, L. R.; Piotto, G. +2 more
This paper is the first of a series of papers in which we will apply the methods we have developed for high-precision astrometry (and photometry) with the Hubble Space Telescope (HST) to the case of wide-field ground-based images. In particular, we adapt the software originally developed for WFPC2 to ground-based, wide field images from the WFI at…
Imaging the circumstellar envelopes of AGB stars
Mauron, N.; Huggins, P. J.
Aims.We report the results of an exploratory program to image the extended circumstellar envelopes of asymptotic giant branch (AGB) stars in dust-scattered galactic light. The goal is to characterize the morphology of the envelopes as a probe of the mass-loss process.
Methods: .The observations consist of short exposures with the VLT and longe…
The luminosity function of young star clusters: implications for the maximum mass and luminosity of clusters
Bastian, N.; Larsen, S. S.; Gieles, M. +1 more
We introduce a method to relate a possible truncation of the star cluster mass function at the high mass end to the shape of the cluster luminosity function (LF). We compare the observed LFs of five galaxies containing young star clusters with synthetic cluster population models with varying initial conditions. The LF of the SMC, the LMC and NGC 5…