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Timothée Guy Olivier Delubac

Cette personne a quitté l’EPFL

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Publications associées (23)

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Cosmological implications of baryon acoustic oscillation measurements

Jean-Paul Richard Kneib, David Schlegel, Timothée Guy Olivier Delubac

We derive constraints on cosmological parameters and tests of dark energy models from the combination of baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) data and a recent reanalysis of Type Ia supernova (SN) data. In p ...

American Physical Society2015

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: selecting emission line galaxies using the Fisher discriminant

Jian Wang, Jean-Paul Richard Kneib, Xiaoqing Zhou, Anand Stéphane Raichoor, Timothée Guy Olivier Delubac

We present a new selection technique of producing spectroscopic target catalogues for massive spectroscopic surveys for cosmology. This work was conducted in the context of the extended Baryon Oscillation Spectroscopic Survey (eBOSS), which will use simila ...

Edp Sciences S A2016

The Sdss-Iv Extended Baryon Oscillation Spectroscopic Survey: Overview And Early Data

Jean-Paul Richard Kneib, Cheng Zhao, Anand Stéphane Raichoor, David Schlegel, Timothée Guy Olivier Delubac, Zheng Zheng

In a six-year program started in 2014 July, the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. These observations will be conducted simultaneous ...

Iop Publishing Ltd2016

Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe

Jean-Paul Richard Kneib, Anand Stéphane Raichoor, David Schlegel, Timothée Guy Olivier Delubac, Chao Liu, Zheng Zheng

We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands of Milky Way stars at high resoluti ...

2017

Clustering properties of g-selected galaxies at z similar to 0.8

Jean-Paul Richard Kneib, David Schlegel, Timothée Guy Olivier Delubac, Ginevra Favole

Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological ...

Wiley-Blackwell2016

The SDSS-IV eBOSS: emission line galaxy catalogues at z approximate to 0.8 and study of systematic errors in the angular clustering

Jean-Paul Richard Kneib, Xiaoqing Zhou, Anand Stéphane Raichoor, Timothée Guy Olivier Delubac

We present two wide-field catalogues of photometrically selected emission line galaxies (ELGs) at z approximate to 0.8 covering about 2800 deg(2)over the south galactic cap. The catalogues were obtained using a Fisher discriminant technique described in a ...

Oxford Univ Press2017

Photometric redshifts and clustering of emission line galaxies selected jointly by DES and eBOSS

Yi Zhang, Jean-Paul Richard Kneib, Eduardo Sanchez, Timothée Guy Olivier Delubac

We present the results of the first observations of the emission line galaxies (ELG) of the extended Baryon Oscillation Spectroscopic Survey. From the total 9000 targets, 4600 have been selected from the Dark Energy Survey (DES). In this subsample, the tot ...

Oxford Univ Press2017

Quasi-stellar objects acting as potential strong gravitational lenses in the SDSS-III BOSS survey

Jean-Paul Richard Kneib, Frédéric Courbin, Timothée Guy Olivier Delubac

We present a sample of 12 quasi-stellar objects (QSOs) that potentially act as strong gravitational lenses on background emission line galaxies (ELG) or Lyman-alpha emitters (LAEs) selected through a systematic search of the 297 301 QSOs in the Sloan Digit ...

EDP SCIENCES S A2019

NEAR-ULTRAVIOLET SPECTROSCOPY OF STAR-FORMING GALAXIES FROM eBOSS: SIGNATURES OF UBIQUITOUS GALACTIC-SCALE OUTFLOWS

Jean-Paul Richard Kneib, Anand Stéphane Raichoor, Jeffrey Newman, Timothée Guy Olivier Delubac

We present rest-frame near-ultraviolet (NUV) spectroscopy of star-forming galaxies (SFGs) at 0.6 < z < 1.2 from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) in SDSS-IV. One of the eBOSS programs is to obtain 2 ''. (about 15 kpc) fiber spect ...

Iop Publishing Ltd2015

The Eleventh And Twelfth Data Releases Of The Sloan Digital Sky Survey: Final Data From Sdss-Iii

Jean-Paul Richard Kneib, David Schlegel, Timothée Guy Olivier Delubac, Zheng Zheng

The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrograp ...

Iop Publishing Ltd2015

Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Ly alpha-Forests

Timothée Guy Olivier Delubac

Here, we use flux-transmission correlations in Ly alpha forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157,783 quasars in the redshift range 2.1

Edp Sciences S A2017

The extended Baryon Oscillation Spectroscopic Survey: a cosmological forecast

Jean-Paul Richard Kneib, Timothée Guy Olivier Delubac

We present a science forecast for the extended Baryon Oscillation Spectroscopic Survey (eBOSS) survey. Focusing on discrete tracers, we forecast the expected accuracy of the baryonic acoustic oscillation (BAO), the redshift-space distortion (RSD) measureme ...

Oxford Univ Press2016

The Tenth Data Release Of The Sloan Digital Sky Survey: First Spectroscopic Data From The Sdss-Iii Apache Point Observatory Galactic Evolution Experiment

Jean-Paul Richard Kneib, David Schlegel, Timothée Guy Olivier Delubac, Zheng Zheng, Ginevra Favole

The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the Tenth Public Data Release (DR10) from its current incarnation, SDSS-III. This data release includes the first spectroscopic data from the Apache Point Obser ...

Iop Publishing Ltd2014

Exploring cosmic homogeneity with the BOSS DR12 galaxy sample

Timothée Guy Olivier Delubac

In this study, we probe the transition to cosmic homogeneity in the Large Scale Structure (LSS) of the Universe using the CMASS galaxy sample of BOSS spectroscopic survey which covers the largest effective volume to date, 3 h(-3) Gpc(3) at 0.43

Iop Publishing Ltd2017

SDSS-IV eBOSS emission-line galaxy pilot survey

Zhirui Xu, Yi Zhang, Jean-Paul Richard Kneib, Eduardo Sanchez, Anand Stéphane Raichoor, David Schlegel, Timothée Guy Olivier Delubac

The Sloan Digital Sky Survey IV extended Baryonic Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) will observe 195 000 emission-line galaxies (ELGs) to measure the baryonic acoustic oscillation (BAO) standard ruler at redshift 0.9. To test different ELG s ...

Edp Sciences S A2016

The evolution of the [O II], H beta and [O III] emission line luminosity functions over the last nine billions years

Jean-Paul Richard Kneib, Anand Stéphane Raichoor, Jeffrey Newman, Timothée Guy Olivier Delubac

Emission line galaxies are one of the main tracers of the large-scale structure to be targeted by the next-generation dark energy surveys. To provide a better understanding of the properties and statistics of these galaxies, we have collected spectroscopic ...

Oxford Univ Press2016

The 0.1 < z < 1.65 evolution of the bright end of the [O II] luminosity function

Jean-Paul Richard Kneib, Jun Ma, David Schlegel, Timothée Guy Olivier Delubac

We present the [O II] (lambda lambda 3729; 3726) luminosity function measured in the redshift range 0.1 < z < 1.65 with unprecedented depth and accuracy. Our measurements are based on medium resolution flux-calibrated spectra of emission line galaxies with ...

EDP Sciences2015

The 13th Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-IV Survey Mapping Nearby Galaxies at Apache Point Observatory

Jean-Paul Richard Kneib, Cheng Zhao, Anand Stéphane Raichoor, David Schlegel, Timothée Guy Olivier Delubac, Chao Liu, Zheng Zheng, Ginevra Favole, Michael James Henry Smith, Yang Gao

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extend ...

Iop Publishing Ltd2017

The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: final emission line galaxy target selection

Yi Wang, Jean-Paul Richard Kneib, Anand Stéphane Raichoor, David Schlegel, Timothée Guy Olivier Delubac, Arjun Dey, Claudio Gorgoni

We describe the algorithm used to select the emission line galaxy (ELG) sample at z similar to 0.85 for the extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey IV, using photometric data from the DECam Legacy Survey. Our select ...

Oxford Univ Press2017

Baryon acoustic oscillations in the Lya forest of BOSS DR11 quasars

Jean-Paul Richard Kneib, David Schlegel, Timothée Guy Olivier Delubac

We report a detection of the baryon acoustic oscillation (BAO) feature in the flux-correlation function of the Ly alpha forest of high-redshift quasars with a statistical significance of five standard deviations. The study uses 137 562 quasars in the redsh ...

EDP Sciences2015