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Galaxy Cluster Scaling Relations between Bolocam Sunyaev-Zel'dovich Effect and Chandra X-Ray Measurements
Pierpaoli, E.; Moustakas, L. A.; Umetsu, K. +11 more
We present scaling relations between the integrated Sunyaev-Zel’dovich effect (SZE) signal, {{Y}SZ}, its X-ray analogue, {{Y}X} ≡ {{M}gas} {{T}X}, and total mass, {{M}tot}, for the 45 galaxy clusters in the Bolocam X-ray SZ (BOXSZ) sample. All parameters are integrated within {{r}2500
Galaxy Zoo: Are bars responsible for the feeding of active galactic nuclei at 0.2 < z < 1.0?
Bell, Eric F.; Kocevski, Dale D.; Trump, Jonathan R. +19 more
We present a new study investigating whether active galactic nuclei (AGN) beyond the local universe are preferentially fed via large-scale bars. Our investigation combines data from Chandra and Galaxy Zoo: Hubble (GZH) in the AEGIS (All-wavelength Extended Groth strip International Survey), COSMOS (Cosmological Evolution Survey), and (Great Observ…
The ACS Fornax Cluster Survey. XI. Catalog of Globular Cluster Candidates
Jordán, Andrés; Eyheramendy, Susana; Côté, Patrick +3 more
We present catalogs of globular cluster (GC) candidates for 43 galaxies from the ACS Fornax Cluster survey, a program designed to carry out imaging of early-type members of the Fornax cluster using the Advanded Camera for Surveys (ACS) on board the Hubble Space Telescope. The procedure to select bona fide GC candidates from the full list of detect…
A transition mass in the local Tully-Fisher relation
Weiner, Benjamin J.; Heckman, Timothy M.; Lotz, Jennifer M. +5 more
We study the stellar mass Tully-Fisher relation (TFR; stellar mass versus rotation velocity) for a morphologically blind selection of emission line galaxies in the field at redshifts 0.1 < z < 0.375. Kinematics (σg, Vrot) are measured from emission lines in Keck/DEIMOS spectra and quantitative morphology is measured fro…
Detection of Callisto's oxygen atmosphere with the Hubble Space Telescope
France, Kevin; Feldman, Paul D.; Strobel, Darrell F. +3 more
We report the result of a search for evidence of an O2-dominated atmosphere on Callisto, using the high far-ultraviolet sensitivity of the Hubble Space Telescope Cosmic Origins Spectrograph (COS). Observations of Callisto's leading/Jupiter-facing hemisphere show, for the first time, variable-strength atomic oxygen (O I) emissions with b…
Comet 67P/Churyumov-Gerasimenko: Constraints on its origin from OSIRIS observations
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +38 more
Context. One of the main aims of the ESA Rosetta mission is to study the origin of the solar system by exploring comet 67P/Churyumov-Gerasimenko at close range.
Aims: In this paper we discuss the origin and evolution of comet 67P/Churyumov-Gerasimenko in relation to that of comets in general and in the framework of current solar system format…
Bicep2 III: Instrumental Systematics
Ade, P. A. R.; Bock, J. J.; Hildebrandt, S. R. +42 more
In a companion paper, we have reported a >5σ detection of degree scale B-mode polarization at 150 GHz by the Bicep2 experiment. Here we provide a detailed study of potential instrumental systematic contamination to that measurement. We focus extensively on spurious polarization that can potentially arise from beam imperfections. We present a he…
Radiative heating and cooling in the middle and lower atmosphere of Venus and responses to atmospheric and spectroscopic parameter variations
Kappel, D.; Arnold, G.; Haus, R.
A sophisticated radiative transfer model that considers absorption, emission, and multiple scattering by gaseous and particulate constituents over the broad spectral range 0.125-1000 µm is applied to calculate radiative fluxes and temperature change rates in the middle and lower atmosphere of Venus (0-100 km). Responses of these quantities t…
Radial Distributions of Sub-Populations in the Globular Cluster M15: A More Centrally Concentrated Primordial Population
Brodie, Jean P.; Strader, Jay; Larsen, Søren S. +3 more
We examine the radial distributions of stellar populations in the globular cluster (GC) M15, using Hubble Space Telescope/Wide Field Camera 3 (WFC3) photometry of red giants in the nitrogen-sensitive F343N-F555W color. Surprisingly, we find that giants with “primordial” composition (i.e., N abundances similar to those in field stars) are the most …
Suzaku broad-band spectrum of 4U 1705-44: probing the reflection component in the hard state
Robba, N. R.; Egron, E.; Papitto, A. +7 more
Iron emission lines at 6.4-6.97 keV, identified with Kα radiative transitions, are among the strongest discrete features in the X-ray band. These are one of the most powerful probes to infer the properties of the plasma in the innermost part of the accretion disc around a compact object. In this paper, we present a recent Suzaku observation, 100-k…