Search Publications
Missions
Journals
Publication Years
The Afterglow and Early-type Host Galaxy of the Short GRB 150101B at z = 0.1343
Berger, E.; Smith, N.; Zaritsky, D. +14 more
We present the discovery of the X-ray and optical afterglows of the short-duration GRB 150101B, pinpointing the event to an early-type host galaxy at z = 0.1343 ± 0.0030. This makes GRB 150101B the most nearby short gamma-ray burst (GRB) with an early-type host galaxy discovered to date. Fitting the spectral energy distribution of the host galaxy …
Stellar parametrization from Gaia RVS spectra
Allende Prieto, C.; Recio-Blanco, A.; de Laverny, P. +7 more
Context. Among the myriad of data collected by the ESA Gaia satellite, about 150 million spectra will be delivered by the Radial Velocity Spectrometer (RVS) for stars as faint as GRVS~ 16. A specific stellar parametrization will be performed on most of these RVS spectra, I.e. those with enough high signal-to-noise ratio (S/N), which sho…
Planck 2015 results. VI. LFI mapmaking
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +198 more
This paper describes the mapmaking procedure applied to Planck Low Frequency Instrument (LFI) data. The mapmaking step takes as input the calibrated timelines and pointing information. The main products are sky maps of I, Q, and U Stokes components. For the first time, we present polarization maps at LFI frequencies. The mapmaking algorithm is bas…
An Ultraviolet Spectrum of the Tidal Disruption Flare ASASSN-14li
Fruchter, Andrew S.; Filippenko, Alexei V.; Ramirez-Ruiz, Enrico +18 more
We present a Hubble Space Telescope Space Telescope Imaging Spectrograph spectrum of ASASSN-14li, the first rest-frame ultraviolet (UV) spectrum of a tidal disruption flare (TDF). The underlying continuum is well fit by a blackbody with {T}{UV}=3.5× {10}4 K, an order of magnitude smaller than the temperature inferred from X-r…
Convolution kernels for multi-wavelength imaging
Abergel, A.; Dole, H.; Bocchio, M. +3 more
Astrophysical images issued from different instruments and/or spectral bands often require to be processed together, either for fitting or comparison purposes. However each image is affected by an instrumental response, also known as point-spread function (PSF), that depends on the characteristics of the instrument as well as the wavelength and th…
Evolution of Thermally Pulsing Asymptotic Giant Branch Stars. V. Constraining the Mass Loss and Lifetimes of Intermediate-mass, Low-metallicity AGB Stars
Williams, Benjamin F.; Dolphin, Andrew; Girardi, Léo +4 more
Thermally pulsing asymptotic giant branch (TP-AGB) stars are relatively short lived (less than a few Myr), yet their cool effective temperatures, high luminosities, efficient mass loss, and dust production can dramatically affect the chemical enrichment histories and the spectral energy distributions of their host galaxies. The ability to accurate…
Constraints on Non-flat Cosmologies with Massive Neutrinos after Planck 2015
Ratra, Bharat; Chen, Yun; Biesiada, Marek +2 more
We investigate two dark energy cosmological models (I.e., the ΛCDM and ϕCDM models) with massive neutrinos assuming two different neutrino mass hierarchies in both the spatially flat and non-flat scenarios, where in the ϕCDM model the scalar field possesses an inverse power-law potential, V(ϕ) ∝ ϕ -α (α > 0). Cosmic microwave backgr…
Quantification of tidal parameters from Solar System data
Lainey, Valéry
Tidal dissipation is the main driver of orbital evolution of natural satellites and a key point to understand the exoplanetary system configurations. Despite its importance, its quantification from observations still remains difficult for most objects of our own Solar System. In this work, we overview the method that has been used to determine, di…
Constraining the time evolution of dark energy, curvature and neutrino properties with cosmic chronometers
Verde, Licia; Jimenez, Raul; Thomas, Daniel +4 more
We use the latest compilation of observational Hubble parameter measurements estimated with the differential evolution of cosmic chronometers, in the redshift range 0<z<2, to place constraints on cosmological parameters. We used a Markov-Chain Monte-Carlo approach to sample the parameter space for the cosmic chronometers dataset alone and in…
Active Spacecraft Potential Control Investigation
Escoubet, C. P.; Nakamura, R.; Svenes, K. +6 more
In tenuous plasma the floating potential of sunlit spacecraft reaches tens of volts, positive. The corresponding field disturbs measurements of the ambient plasma by electron and ion sensors and can reduce micro-channel plate lifetime in electron detectors owing to large fluxes of attracted photoelectrons. Also the accuracy of electric field measu…