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The unexpected origin of plasmaspheric hiss from discrete chorus emissions
Meredith, Nigel P.; Thorne, Richard M.; Bortnik, Jacob
Plasmaspheric hiss is a type of electromagnetic wave found ubiquitously in the dense plasma region that encircles the Earth, known as the plasmasphere. This important wave is known to remove the high-energy electrons that are trapped along the Earth's magnetic field lines, and therefore helps to reduce the radiation hazards to satellites and human…
The Structure of the Local Interstellar Medium. IV. Dynamics, Morphology, Physical Properties, and Implications of Cloud-Cloud Interactions
Redfield, Seth; Linsky, Jeffrey L.
We present an empirical dynamical model of the LISM based on 270 radial velocity measurements for 157 sight lines toward nearby stars. Physical parameter measurements (i.e., temperature, turbulent velocity, depletions) are available for 90 components, or one-third of the sample, enabling initial characterizations of the physical properties of LISM…
Reproducibility of Non-X-Ray Background for the X-Ray Imaging Spectrometer aboard Suzaku
Dotani, Tadayasu; Miller, Eric D.; Yamaguchi, Hiroya +9 more
One of the advantages of the X-ray Imaging Spectrometer (XIS) system aboard Suzaku is its low and stable non-X-ray background (NXB). In order to make the best use of this advantage, modeling the NXB spectra with high accuracy is important to subtract them from the spectra of on-source observations. We are constructing an NXB database by collecting…
FIREWORKS U38-to-24 µm Photometry of the GOODS Chandra Deep Field-South: Multiwavelength Catalog and Total Infrared Properties of Distant Ks-selected Galaxies
van Dokkum, Pieter G.; Franx, Marijn; Labbé, Ivo +4 more
We present a Ks-selected catalog, dubbed FIREWORKS, for the Chandra Deep Field-South (CDF-S) containing photometry in the U38, B435, B, V, V606, R, i775, I, z850, J, H, Ks, [3.6 µm], [4.5 µm], [5.8 µm], [8.0 µm], and MIPS [24 µm] bands. The i…
z ~ 7-10 Galaxies in the HUDF and GOODS Fields: UV Luminosity Functions
Franx, Marijn; Illingworth, Garth D.; Bouwens, Rychard J. +1 more
We use all available deep optical ACS and near-IR data over both the HUDF and the two GOODS fields to search for star-forming galaxies at zgtrsim 7 and constrain the UV LF within the first 700 Myr. Our data set includes ~23 arcmin2 of deep NICMOS J + H data and ~248 arcmin2 of ground-based (ISAAC+MOIRCS) data, coincident with…
Swift BAT Survey of AGNs
Gehrels, N.; Mushotzky, R. F.; Barthelmy, S. +5 more
We present the results of the analysis of the first 9 months of data of the Swift BAT survey of AGNs in the 14-195 keV band. Using archival X-ray data or follow-up Swift XRT observations, we have identified 129 (103 AGNs) of 130 objects detected at | b| > 15° and with significance >4.8 σ. One source remains unidentified. These same X-ray dat…
The Chandra Deep Field-South Survey: 2 Ms Source Catalogs
Smail, I.; Finoguenov, A.; Lehmer, B. D. +19 more
We present point-source catalogs for the ≈2 Ms exposure of the Chandra Deep Field-South (CDF-S); this is one of the two most sensitive X-ray surveys ever performed. The survey covers an area of ≈436 arcmin2 and reaches on-axis sensitivity limits of ≈1.9 × 10-17 and ≈1.3 × 10-16 ergs cm-2 s-1 f…
A periodicity of ~1hour in X-ray emission from the active galaxy RE J1034+396
Done, Chris; Ward, Martin; Gierliński, Marek +1 more
Active galactic nuclei and quasars are thought to be scaled-up versions of Galactic black hole binaries, powered by accretion onto supermassive black holes with masses of 106-109, as opposed to the ~10 in binaries (here is the solar mass). One example of the similarities between these two types of systems is the characteristi…
A High-Resolution Survey of Low-Redshift QSO Absorption Lines: Statistics and Physical Conditions of O VI Absorbers
Richter, Philipp; Bowen, David V.; Tripp, Todd M. +4 more
Using high-resolution ultraviolet spectra of 16 low-z QSOs obtained with the E140M echelle mode of the Space Telescope Imaging Spectrograph, we study the physical conditions and statistics of O VI absorption in the intergalactic medium (IGM) at z < 0.5. We identify 51 intervening (zabsll zQSO) O VI systems comprising 77 in…
The ACS Survey of Galactic Globular Clusters. III. The Double Subgiant Branch of NGC 1851
Anderson, J.; Milone, A. P.; Sarajedini, A. +13 more
Photometry with the Hubble Space Telescope Advanced Camera for Surveys (HST ACS) reveals that the subgiant branch (SGB) of the globular cluster NGC 1851 splits into two well-defined branches. If the split is due only to an age effect, the two SGBs would imply two star formation episodes separated by ~1 Gyr. We discuss other anomalies in NGC 1851 t…