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Tytuł:
The VIMOS Public Extragalactic Redshift Survey : reconstruction of the redshift-space galaxy density field
Autorzy:
Tasca, L. A. M.
Coupon, J.
Marinoni, C.
Moutard, T.
Di Porto, C.
Ilbert, O.
Bolzonella, M.
Davidzon, I.
Iovino, A.
Mellier, Y.
Adami, C.
Abbas, U.
Fumana, M.
de la Torre, S.
McCracken, H. J.
Cucciati, O.
Peacock, J. A.
Zamorani, G.
Tojeiro, R.
Marulli, F.
Branchini, E.
Guzzo, L.
Moscardini, L.
Krywult, J.
Le Fèvre, O.
Burden, A.
Maccagni, D.
Małek, K.
Vergani, D.
Arnouts, S.
Zanichelli, A.
Marchetti, A.
Percival, W. J.
Pollo, Agnieszka
Le Brun, V.
Cappi, A.
Scodeggio, M.
De Lucia, G.
Garilli, B.
Polletta, M.
Fritz, A.
Franzetti, P.
Bel, J.
Nichol, R. C.
Bottini, D.
Granett, B. R.
Opis:
Aims. Using the VIMOS Public Extragalactic Redshift Survey (VIPERS) we aim to jointly estimate the keyparameters that describe the galaxy density field and its spatial correlations in redshift space. Methods. We use the Bayesian formalism to jointly reconstruct the redshift-space galaxy density field, power spectrum, galaxy bias and galaxy luminosity function given the observations and survey selection function. The high-dimensional posterior distribution is explored using the Wiener filter within a Gibbs sampler. We validate the analysis using simulated catalogues and apply it to VIPERS data taking into consideration the inhomogeneous selection function. Results. We present joint constraints on the anisotropic power spectrum, and the bias and number density of red and blue galaxy classes in luminosity and redshift bins as well as the measurement covariances of these quantities. We find that the inferred galaxy bias and number density parameters are strongly correlated although they are only weakly correlated with the galaxy power spectrum. The power spectrum and redshift-space distortion parameters are in agreement with previous VIPERS results with the value of the growth rate $f\sigma _{8} = 0.38$ with 18% uncertainty at redshift 0.7.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The VIMOS Public Extragalactic Survey (VIPERS) : first data release of 57 204 spectroscopic measurements
Autorzy:
Mellier, Y.
Marulli, F.
De Lucia, G.
Bottini, D.
Coupon, J.
Scodeggio, M.
Krywult, J.
Iovino, A.
Adami, C.
Wolk, M.
Branchini, E.
de la Torre, S.
McCracken, H. J.
Cappi, A.
Burden, A.
Granett, B. R.
Tojeiro, R.
Maccagni, D.
Tasca, L. A. M.
Nichol, R. C.
Zamorani, G.
Bolzonella, M.
Percival, W. J.
Moscardini, L.
Guzzo, L.
Polletta, M.
Franzetti, P.
Marinoni, C.
Abbas, U.
Schlagenhaufer, H.
Pollo, Agnieszka
Fritz, A.
Phleps, S.
Ilbert, O.
Le Fèvre, O.
Zanichelli, A.
Peacock, J. A.
Cucciati, O.
Le Brun, V.
Davidzon, I.
Bel, J.
Małek, K.
Fumana, M.
Arnouts, S.
Di Porto, C.
Marchetti, A.
Vergani, D.
Paioro, L.
Garilli, B.
Opis:
We present the first Public Data Release (PDR-1) of the VIMOS Public Extragalactic Survey (VIPERS). It comprises 57 204 spectroscopic measurements together with all additional information necessary for optimal scientific exploitation of the data, in particular the associated photometric measurements and quantification of the photometric and survey completeness. VIPERS is an ESO Large Programme designed to build a spectroscopic sample of ≃100 000 galaxies with i_{AB} < 22.5 and 0.5 < z < 1.2 with high sampling rate (≃45%). The survey spectroscopic targets are selected from the CFHTLS-Wide five-band catalogues in the W1 and W4 fields. The final survey will cover a total area of nearly 24 deg^{2}, for a total comoving volume between z = 0.5 and 1.2 of ≃4 × 10^{7} h^{-3} Mpc^{3} and a median galaxy redshift of z ≃ 0.8. The release presented in this paper includes data from virtually the entire W4 field and nearly half of the W1 area, thus representing 64% of the final dataset. We provide a detailed description of sample selection, observations and data reduction procedures; we summarise the global properties of the spectroscopic catalogue and explain the associated data products and their use, and provide all the details for accessing the data through the survey database (http://vipers.inaf.it) where all information can be queried interactively.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The formation and build-up of the red-sequence over the past 9 Gyr in VIPERS
Autorzy:
Mellier, Y.
Marulli, F.
De Lucia, G.
Fritz, Alexander
Bottini, D.
Coupon, J.
Scodeggio, M.
Krywult, J.
Iovino, A.
Adami, C.
Branchini, E.
de la Torre, S.
McCracken, H. J.
Burden, A.
Cappi, A.
Granett, B. R.
Tojeiro, R.
Maccagni, D.
Tasca, L. A. M.
Nichol, R. C.
Zamorani, G.
Bolzonella, M.
Percival, W. J.
Moscardini, L.
Guzzo, L.
Polletta, M.
Franzetti, P.
Marinoni, C.
Abbas, U.
Pollo, Agnieszka
Ilbert, O.
Le Fèvre, O.
Peacock, J. A.
Zanichelli, A.
Cucciati, O.
Le Brun, V.
Davidzon, I.
Bel, J.
Małek, K.
Fumana, M.
Arnouts, S.
Di Porto, C.
Marchetti, A.
Vergani, D.
Paioro, L.
Garilli, B.
Wydawca:
Cambridge University Press
Opis:
We present the Luminosity Function (LF) and Colour-Magnitude Relation (CMR) using ~45000 galaxies drawn from the VIMOS Public Extragalactic Redshift Survey (VIPERS). Using different selection criteria, we define several samples of early-type galaxies and explore their impact on the evolution of the red-sequence (RS) and the effects of dust. Our results suggest a rapid build-up of the RS within a short time scale. We find a rise in the number density of early-type galaxies and a strong evolution in LF and CMR. Massive galaxies exist already 9 Gyr ago and experience an efficient quenching of their star formation at z = 1, followed by a passive evolution with only limited merging activity. In contrast, low-mass galaxies indicate a different mass assembly history and cause a slow build-up of the CMR over cosmic time.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
The VIMOS Public Extragalactic Redshift Survey (VIPERS) : luminosity and stellar mass dependence of galaxy clustering at 0.5 < z < 1.1
Autorzy:
Krywult, J.
Vergani, D.
Burden, A.
Marinoni, C.
Moscardini, L.
Branchini, E.
Paioro, L.
Schlagenhaufer, H.
Zanichelli, A.
Tojeiro, R.
Bolzonella, M.
Arnouts, S.
Fumana, M.
Garilli, B.
Le Brun, V.
Adami, C.
Cucciati, O.
Davidzon, I.
Cappi, A.
Pollo, Agnieszka
Coupon, J.
Marchetti, A.
Marulli, F.
Bel, J.
Maccagni, D.
Scodeggio, M.
Guzzo, L.
Zamorani, G.
Małek, K.
De Lucia, G.
Polletta, M.
Mellier, Y.
de la Torre, S.
Di Porto, C.
Granett, B. R.
Abbas, U.
McCracken, H. J.
Phleps, S.
Bottini, D.
Le Fèvre, O.
Nichol, R. C.
Tasca, L. A. M.
Fritz, A.
Ilbert, O.
Percival, W. J.
Wolk, M.
Iovino, A.
Peacock, J. A.
Franzetti, P.
Opis:
Aims. We investigate the dependence of galaxy clustering on luminosity and stellar mass in the redshift range 0.5 < z < 1.1, using the first $\sim$ 55 000 redshifts from the VIMOS Public Extragalactic Redshift Survey (VIPERS). Methods. We measured the redshift-space two-point correlation functions (2PCF),$\xi$ (s) and $\xi (r_{p},\pi )$ , and the projected correlation function, $w_{p}(r_{p})$, in samples covering different ranges of B-band absolute magnitudes and stellar masses. We considered both threshold and binned galaxy samples, with median B-band absolute magnitudes - 21.6 $\lesssim M_{B} - 5log (h) \lesssim -19.5$ and median stellar masses $9.8 _\lesssim log (M_{\bigstar } [h^{-2} M_{\bigodot }]) \lesssim 10.7$. We assessed the real-space clustering in the data from the projected correlation function, which we model as a power law in the range  $0.2 < r_{p} [h^{-1} Mpc] < 20$. Finally, we estimated the galaxy bias as a function of luminosity, stellar mass, and redshift, assuming a flat $\Lambda$ cold dark matter model to derive the dark matter 2PCF. Results. We provide the best-fit parameters of the power-law model assumed for the real-space 2PCF – the correlation length, $r_{0}$, and the slope, $\gamma$ – as well as the linear bias parameter, as a function of the B-band absolute magnitude, stellar mass, and redshift. We confirm and provide the tightest constraints on the dependence of clustering on luminosity at 0.5 < z < 1.1. We prove the complexity of comparing the clustering dependence on stellar mass from samples that are originally flux-limited and discuss the possible origin of the observed discrepancies. Overall, our measurements provide stronger constraints on galaxy formation models, which are now required to match, in addition to local observations, the clustering evolution measured by VIPERS galaxies between z = 0.5 and z = 1.1 for a broad range of luminosities and stellar masses.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The VIMOS Public Extragalactic Redshift Survey (VIPERS) : on the recovery of the count-in-cell probability distribution function
Autorzy:
Tasca, L. A. M.
Coupon, J.
Marinoni, C.
Di Porto, C.
Ilbert, O.
Bolzonella, M.
Davidzon, I.
Iovino, A.
Mellier, Y.
Adami, C.
Abbas, U.
Fumana, M.
de la Torre, S.
McCracken, H. J.
Schlagenhaufer, H.
Cucciati, O.
Peacock, J. A.
Tojeiro, R.
Marulli, F.
Branchini, E.
Guzzo, L.
Moscardini, L.
Krywult, J.
Le Fèvre, O.
Burden, A.
Maccagni, D.
Małek, K.
Vergani, D.
Arnouts, S.
Zanichelli, A.
Marchetti, A.
Paioro, L.
Percival, W. J.
Phleps, S.
Pollo, Agnieszka
Le Brun, V.
Wolk, M.
Cappi, A.
Scodeggio, M.
De Lucia, G.
Garilli, B.
Polletta, M.
Fritz, A.
Franzetti, P.
Bel, J.
Nichol, R. C.
Bottini, D.
Granett, B. R.
Opis:
We compare three methods to measure the count-in-cell probability density function of galaxies in a spectroscopic redshift survey. From this comparison we found that, when the sampling is low (the average number of object per cell is around unity), it is necessary to use a parametric method to model the galaxy distribution. We used a set of mock catalogues of VIPERS to verify if we were able to reconstruct the cell-count probability distribution once the observational strategy is applied. We find that, in the simulated catalogues, the probability distribution of galaxies is better represented by a Gamma expansion than a skewed log-normal distribution. Finally, we correct the cell-count probability distribution function from the angular selection effect of the VIMOS instrument and study the redshift and absolute magnitude dependency of the underlying galaxy density function in VIPERS from redshift 0.5 to 1.1. We found a very weak evolution of the probability density distribution function and that it is well approximated by a Gamma distribution, independently of the chosen tracers.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Wyświetlanie 1-10 z 25

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