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Discovery of a warm, dusty giant planet around HIP 65426
Moutou, C.; Rouan, D.; Augereau, J. -C. +120 more
Aims: The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE's unprecedented high-contrast and high-angular-resolution imaging capabilities. It is also intended to place statistical constraints on the rate, mass and orbital distribut…
KiDS-450: the tomographic weak lensing power spectrum and constraints on cosmological parameters
Heymans, C.; Choi, A.; Hoekstra, H. +13 more
We present measurements of the weak gravitational lensing shear power spectrum based on 450 ° ^2 of imaging data from the Kilo Degree Survey. We employ a quadratic estimator in two and three redshift bins and extract band powers of redshift autocorrelation and cross-correlation spectra in the multipole range 76 ≤ ℓ ≤ 1310. The cosmological interpr…
KiDS-450: testing extensions to the standard cosmological model
Hoekstra, Henk; Heymans, Catherine; Kuijken, Konrad +16 more
We test extensions to the standard cosmological model with weak gravitational lensing tomography using 450 deg2 of imaging data from the Kilo Degree Survey (KiDS). In these extended cosmologies, which include massive neutrinos, non-zero curvature, evolving dark energy, modified gravity and running of the scalar spectral index, we also e…
Lyα Profile, Dust, and Prediction of Lyα Escape Fraction in Green Pea Galaxies
Leitherer, Claus; Wofford, Aida; Tilvi, V. +7 more
We studied Lyman-α (Lyα) escape in a statistical sample of 43 Green Peas with HST/COS Lyα spectra. Green Peas are nearby star-forming galaxies with strong [O III]λ5007 emission lines. Our sample is four times larger than the previous sample and covers a much more complete range of Green Pea properties. We found that about two-thirds of Green Peas …
The GALAH survey: observational overview and Gaia DR1 companion
Freeman, K. C.; Marshall, J. P.; Da Costa, G. S. +31 more
The Galactic Archaeology with HERMES (GALAH) survey is a massive observational project to trace the Milky Way's history of star formation, chemical enrichment, stellar migration and minor mergers. Using high-resolution (R ≃ 28 000) spectra, taken with the High Efficiency and Resolution Multi-Element Spectrograph (HERMES) instrument at the Anglo-Au…
CANDELS Multi-wavelength Catalogs: Source Identification and Photometry in the CANDELS Extended Groth Strip
Barro, Guillermo; Castellano, Marco; Fontana, Adriano +39 more
We present a 0.4-8 µm multi-wavelength photometric catalog in the Extended Groth Strip (EGS) field. This catalog is built on the Hubble Space Telescope (HST) WFC3 and ACS data from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), and it incorporates the existing HST data from the All-wavelength Extended Groth str…
The Atacama Cosmology Telescope: two-season ACTPol spectra and parameters
Hilton, Matt; Hasselfield, Matthew; Battaglia, Nicholas +80 more
We present the temperature and polarization angular power spectra measured by the Atacama Cosmology Telescope Polarimeter (ACTPol). We analyze night-time data collected during 2013-14 using two detector arrays at 149 GHz, from 548 deg2 of sky on the celestial equator. We use these spectra, and the spectra measured with the MBAC camera o…
Galileon gravity in light of ISW, CMB, BAO and H0 data
Barreira, Alexandre; Montanari, Francesco; Renk, Janina +1 more
Cosmological models with Galileon gravity are an alternative to the standard ΛCDM paradigm with testable predictions at the level of its self-accelerating solutions for the expansion history, as well as large-scale structure formation. Here, we place constraints on the full parameter space of these models using data from the cosmic microwave backg…
On the use of C-stat in testing models for X-ray spectra
Kaastra, J. S.
Context. It has been shown that for the analysis of X-ray spectra the C-statistic, contrary to the χ2-statistic, provides unbiased estimates of the model parameters and their uncertainty ranges.
Aims: However, it is often stated that the C-statistic cannot be used to carry out statistical tests on the goodness of fit of the model, …
Carbon-rich dust in comet 67P/Churyumov-Gerasimenko measured by COSIMA/Rosetta
Langevin, Yves; Fischer, Henning; Ligier, Nicolas +23 more
Cometary ices are rich in CO2, CO and organic volatile compounds, but the carbon content of cometary dust was only measured for the Oort Cloud comet 1P/Halley, during its flyby in 1986. The COmetary Secondary Ion Mass Analyzer (COSIMA)/Rosetta mass spectrometer analysed dust particles with sizes ranging from 50 to 1000 µm, collect…