Search Publications
Lyα and C III] emission in z = 7-9 Galaxies: accelerated reionization around luminous star-forming systems?
Charlot, Stéphane; Chevallard, Jacopo; Tang, Mengtao +9 more
We discuss new Keck/MOSFIRE spectroscopic observations of four luminous galaxies at z ≃ 7-9 selected to have intense optical line emission by Roberts-Borsani et al. Previous follow-up has revealed Lyα in two of the four galaxies. Our new MOSFIRE observations confirm that Lyα is present in the entire sample. We detect Lyα emission in the galaxy COS…
The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: anisotropic galaxy clustering in Fourier space
Ross, Nicholas P.; Schneider, Donald P.; Eisenstein, Daniel J. +20 more
We investigate the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 sample, which consists of 1198 006 galaxies in the redshift range 0.2 < z < 0.75 and a sky coverage of 10 252 deg2. We analyse this data set in Fourier space, using the power-spectrum multipoles to measure redshift-space…
A New Generation of Standard Solar Models
Basu, Sarbani; Serenelli, Aldo M.; Bergström, Johannes +6 more
We compute a new generation of standard solar models (SSMs) that includes recent updates on some important nuclear reaction rates and a more consistent treatment of the equation of state. Models also include a novel and flexible treatment of opacity uncertainties based on opacity kernels, required in light of recent theoretical and experimental wo…
Discovery of a 0.42-s pulsar in the ultraluminous X-ray source NGC 7793 P13
Salvaterra, R.; Haberl, F.; Greiner, J. +11 more
NGC 7793 P13 is a variable (luminosity range ∼100) ultraluminous X-ray source proposed to host a stellar-mass black hole of less than 15 M⊙ in a binary system with orbital period of 64 d and a 18-23 M⊙ B9Ia companion. Within the EXTraS (Exploring the X-ray Transient and variable Sky) project, we discovered pulsations at a per…
Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift
Aussel, H.; Ivison, R. J.; Ilbert, O. +20 more
ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field. The galaxy sample has known far-infrared luminosities and, hence, star formation rates (SFRs) and stellar masses ({M}* ) from the optical-infrared spectrum f…
H0LiCOW - I. H0 Lenses in COSMOGRAIL's Wellspring: program overview
Treu, T.; Blandford, R. D.; Auger, M. W. +21 more
Strong gravitational lens systems with time delays between the multiple images allow measurements of time-delay distances, which are primarily sensitive to the Hubble constant that is key to probing dark energy, neutrino physics and the spatial curvature of the Universe, as well as discovering new physics. We present H0LiCOW (H0 Lenses …
The MUSE Hubble Ultra Deep Field Survey. I. Survey description, data reduction, and source detection
Bacon, Roland; Bouché, Nicolas; Inami, Hanae +24 more
We present the MUSE Hubble Ultra Deep Survey, a mosaic of nine MUSE fields covering 90% of the entire HUDF region with a 10-h deep exposure time, plus a deeper 31-h exposure in a single 1.15 arcmin2 field. The improved observing strategy and advanced data reduction results in datacubes with sub-arcsecond spatial resolution (0.̋65 at 7000…
Coronal mass ejections and their sheath regions in interplanetary space
Pulkkinen, Tuija I.; Koskinen, Hannu E. J.; Kilpua, Emilia
Interplanetary coronal mass ejections (ICMEs) are large-scale heliospheric transients that originate from the Sun. When an ICME is sufficiently faster than the preceding solar wind, a shock wave develops ahead of the ICME. The turbulent region between the shock and the ICME is called the sheath region. ICMEs and their sheaths and shocks are all in…
Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
Batalha, Natalie M.; Bieryla, Allyson; Latham, David W. +14 more
The determination of exoplanet properties and occurrence rates using Kepler data critically depends on our knowledge of the fundamental properties (such as temperature, radius, and mass) of the observed stars. We present revised stellar properties for 197,096 Kepler targets observed between Quarters 1-17 (Q1-17), which were used for the final tran…
MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle
Chhun, Ratana; Métris, Gilles; Rodrigues, Manuel +40 more
According to the weak equivalence principle, all bodies should fall at the same rate in a gravitational field. The MICROSCOPE satellite, launched in April 2016, aims to test its validity at the 10-15 precision level, by measuring the force required to maintain two test masses (of titanium and platinum alloys) exactly in the same orbit. …