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Phobos' shape and topography models
Shi, X.; Oberst, J.; Willner, K.
The global shape and the dynamic environment are fundamental properties of a body. Other properties such as volume, bulk density, and models for the dynamic environment can subsequently be computed based on such models. Stereo-photogrammetric methods were applied to derive a global digital terrain model (DTM) with 100 m/pixel resolution using High…
Planck 2013 results. X. HFI energetic particle effects: characterization, removal, and simulation
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +213 more
We describe the detection, interpretation, and removal of the signal resulting from interactions of high energy particles with the Planck High Frequency Instrument (HFI). There are two types of interactions: heating of the 0.1 K bolometer plate; and glitches in each detector time stream. The transientresponses to detector glitch shapes are not sim…
First Evidence of Fully Spatially Mixed First and Second Generations in Globular Clusters: The Case of NGC 6362
Dalessandro, Emanuele; Salaris, Maurizio; Mucciarelli, Alessio +6 more
We present the first evidence of multiple populations in the Galactic globular cluster NGC 6362. We used optical and near-UV Hubble Space Telescope and ground-based photometry, finding that both the sub-giant and red giant branches are split in two parallel sequences in all color-magnitude diagrams where the F336W filter (or U band) is used. This …
A Hot Cocoon in the Ultralong GRB 130925A: Hints of a POPIII-like Progenitor in a Low-Density Wind Environment
Fiore, Fabrizio; Piro, Luigi; Wieringa, Mark H. +7 more
GRB 130925A is a peculiar event characterized by an extremely long gamma-ray duration (≈7 ks), as well as dramatic flaring in the X-rays for ≈20 ks. After this period, its X-ray afterglow shows an atypical soft spectrum with photon index Γ ~ 4, as observed by Swift and Chandra, until ≈107 s, when XMM-Newton observations uncover a harder…
Water Vapor in the Spectrum of the Extrasolar Planet HD 189733b. II. The Eclipse
Deming, Drake; Madhusudhan, Nikku; Crouzet, Nicolas +1 more
Spectroscopic observations of exoplanets are crucial to infer the composition and properties of their atmospheres. HD 189733b is one of the most extensively studied exoplanets and is a cornerstone for hot Jupiter models. In this paper, we report the dayside emission spectrum of HD 189733b in the wavelength range 1.1-1.7 µm obtained with the …
Young Galaxy Candidates in the Hubble Frontier Fields. I. A2744
Broadhurst, Tom; Kelson, Daniel D.; Moustakas, John +10 more
We report the discovery of 24 Lyman-break candidates at 7 <~ z <~ 10.5, in the Hubble Frontier Fields (HFF) imaging data of A2744 (z = 0.308), plus Spitzer/IRAC data and archival ACS data. The sample includes a triple image system with a photometric redshift of z ~= 7.4. This high redshift is geometrically confirmed by our lens model corresp…
MOSFIRE Absorption Line Spectroscopy of z > 2 Quiescent Galaxies: Probing a Period of Rapid Size Growth
Ellis, Richard S.; Belli, Sirio; Newman, Andrew B. +1 more
Using the MOSFIRE near-infrared multi-slit spectrograph on the Keck 1 Telescope, we have secured high signal-to-noise ratio absorption line spectra for six massive galaxies with redshift 2 < z < 2.5. Five of these galaxies lie on the red sequence and show signatures of passive stellar populations in their rest-frame optical spectra. By fitti…
Coronal Mass Ejections and Non-recurrent Forbush Decreases
Gopalswamy, N.; Mavromichalaki, H.; Papaioannou, A. +7 more
Coronal mass ejections (CMEs) and their interplanetary counterparts (interplanetary coronal mass ejections, ICMEs) are responsible for large solar energetic particle events and severe geomagnetic storms. They can modulate the intensity of Galactic cosmic rays, resulting in non-recurrent Forbush decreases (FDs). We investigate the connection betwee…
NuSTAR Unveils a Compton-thick Type 2 Quasar in Mrk 34
Harrison, F. A.; Stern, D.; Zhang, W. W. +27 more
We present Nuclear Spectroscopic Telescope Array (NuSTAR) 3-40 keV observations of the optically selected Type 2 quasar (QSO2) SDSS J1034+6001 or Mrk 34. The high-quality hard X-ray spectrum and archival XMM-Newton data can be fitted self-consistently with a reflection-dominated continuum and a strong Fe Kα fluorescence line with equivalent width …
New light on gamma-ray burst host galaxies with Herschel
Berta, S.; Le Floc'h, E.; Covino, S. +17 more
Until recently, dust emission has been detected in very few host galaxies of gamma-ray bursts (GRBHs). With Herschel, we have now observed 17 GRBHs up to redshift z ~ 3 and detected 7 of them at infrared (IR) wavelengths. This relatively high detection rate (41%) may be due to the composition of our sample which at a median redshift of 1.1 is domi…