Search Publications
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…
Space Telescope and Optical Reverberation Mapping Project. IV. Anomalous Behavior of the Broad Ultraviolet Emission Lines in NGC 5548
Im, M.; Geier, S.; Brandt, W. N. +98 more
During an intensive Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) UV monitoring campaign of the Seyfert 1 galaxy NGC 5548 performed from 2014 February to July, the normally highly correlated far UV continuum and broad emission line variations decorrelated for ∼60-70 days, starting ∼75 days after the first HST/COS observation. Foll…
Relativistic reverberation in the accretion flow of a tidal disruption event
Miller, Jon M.; Kara, Erin; Dai, Lixin +1 more
Our current understanding of the curved space-time around supermassive black holes is based on actively accreting black holes, which make up only ten per cent or less of the overall population. X-ray observations of that small fraction reveal strong gravitational redshifts that indicate that many of these black holes are rapidly rotating; however,…
Low-metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z ≲ 1
Prochaska, J. Xavier; Lehner, Nicolas; Howk, J. Christopher +2 more
We present an analysis of the metallicity distribution of the dense circumgalactic medium (CGM) of galaxies at 0.1 ≲ z ≲ 1.1 as probed by partial Lyman limit systems (pLLSs, 16.1 < log {N}{{H}{{I}}} < 17.2) and LLSs (17.2 ≤ log {N}{{H}{{I}}} < 17.7 in our sample). The new H I-selected sample, drawn from our Hubble Sp…
The BOSS Emission-line Lens Survey. III. Strong Lensing of Lyα Emitters by Individual Galaxies
Brownstein, Joel R.; Marques-Chaves, Rui; Oguri, Masamune +8 more
We introduce the Baryon Oscillation Spectroscopic Survey (BOSS) Emission-Line Lens Survey GALaxy-Lyα EmitteR sYstems (BELLS GALLERY) Survey, which is a Hubble Space Telescope program to image a sample of galaxy-scale strong gravitational lens candidate systems with high-redshift Lyα emitters (LAEs) as the background sources. The goal of the BELLS …