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3D stellar reddening map from 2MASS photometry: An improved version
Gontcharov, G. A.
An improved version of the 3D stellar reddening map in a space with a radius of 1200 pc around the Sun and within 600 pc of the Galactic midplane is presented. As in the previous 2010 and 2012 versions of the map, photometry with an accuracy better than 0.05 m in the J and Ks bands for more than 70 million stars from the 2MASS catalogu…
Cosmological constraints on the neutrino mass including systematic uncertainties
Couchot, F.; Henrot-Versillé, S.; Perdereau, O. +4 more
When combining cosmological and oscillations results to constrain the neutrino sector, the question of the propagation of systematic uncertainties is often raised. We address this issue in the context of the derivation of an upper bound on the sum of the neutrino masses (Σmν) with recent cosmological data. This work is performed within …
Powerful H2 Line Cooling in Stephan’s Quintet. II. Group-wide Gas and Shock Modeling of the Warm H2 and a Comparison with [C II] 157.7 µm Emission and Kinematics
Boulanger, F.; Appleton, P. N.; Xu, C. K. +7 more
We map for the first time the two-dimensional H2 excitation of warm intergalactic gas in Stephan's Quintet on group-wide (50 × 35 kpc2) scales to quantify the temperature, mass, and warm H2 mass fraction as a function of position using Spitzer. Molecular gas temperatures are seen to rise (to T > 700 K) and the s…
A Probabilistic Approach to Fitting Period-luminosity Relations and Validating Gaia Parallaxes
Rix, Hans-Walter; Fouesneau, Morgan; Price-Whelan, Adrian M. +3 more
Pulsating stars, such as Cepheids, Miras, and RR Lyrae stars, are important distance indicators and calibrators of the “cosmic distance ladder,” and yet their period-luminosity-metallicity (PLZ) relations are still constrained using simple statistical methods that cannot take full advantage of available data. To enable optimal usage of data provid…
No hydrogen exosphere detected around the super-Earth HD 97658 b
Ehrenreich, D.; Lecavelier des Etangs, A.; Udry, S. +5 more
The exoplanet HD 97658 b provides a rare opportunity to probe the atmospheric composition and evolution of moderately irradiated super-Earths. It transits a bright K star at a moderate orbital distance of 0.08 au. Its low density is compatible with a massive steam envelope that could photodissociate at high altitudes and become observable as escap…
Super-Eddington QSO RX J0439.6-5311 - I. Origin of the soft X-ray excess and structure of the inner accretion flow
Done, Chris; Ward, Martin; Jin, Chichuan
We report the results from a recent 133 ks XMM-Newton observation of a highly super-Eddington narrow-line Type-1 quasi-stellar object RX J0439.6-5311. This source has one of the steepest active galactic nuclei hard X-ray slopes, in addition to a prominent and smooth soft X-ray excess. Strong variations are found throughout the 0.3-10 keV energy ra…
Challenging Some Contemporary Views of Coronal Mass Ejections. II. The Case for Absent Filaments
DeForest, C. E.; Howard, T. A.; Schneck, U. G. +1 more
When a coronal mass ejection (CME) appears in a coronagraph it often exhibits three parts. This “classic” three-part configuration consists of a bright leading edge, a dark circular- or teardrop-shaped cavity, and a bright core within the cavity. It is generally accepted that these are manifestations of coronal plasma pileup, the driving magnetic …
Calibrating the Planck cluster mass scale with CLASH
Bartlett, J. G.; Evrard, A. E.; Rykoff, E. +5 more
We determine the mass scale of Planck galaxy clusters using gravitational lensing mass measurements from the Cluster Lensing And Supernova survey with Hubble (CLASH). We have compared the lensing masses to the Planck Sunyaev-Zeldovich (SZ) mass proxy for 21 clusters in common, employing a Bayesian analysis to simultaneously fit an idealized CLASH …
The Grism Lens-amplified Survey from Space (Glass). IX. The Dual Origin of Low-mass Cluster Galaxies as Revealed by New Structural Analyses
Schmidt, Kasper B.; Treu, Tommaso; Bradač, Maruša +10 more
Using deep Hubble Frontier Fields imaging and slitless spectroscopy from the Grism Survey from Space, we study 2200 cluster and 1748 field galaxies at 0.2≤slant z≤slant 0.7 to determine the impact of environment on galaxy size and structure at stellar masses {log}{M}* /{M}⊙ > 7.8, an unprecedented limit at these redshifts.…
Instrumental response model and detrending for the Dark Energy Camera
Abbott, T. M. C.; Desai, S.; Gruen, D. +12 more
We describe the model for mapping from sky brightness to the digital output of the Dark Energy Camera (DECam) and the algorithms adopted by the Dark Energy Survey (DES) for inverting this model to obtain photometric measures of celestial objects from the raw camera output. This calibration aims for fluxes that are uniform across the camera field o…