Search Publications
Tracing the Lowest Propeller Line in Magellanic High-mass X-Ray Binaries
Laycock, Silas G. T.; Christodoulou, Dimitris M.; Yang, Jun +1 more
We have combined the published observations of high-mass X-ray binary (HMXB) pulsars in the Magellanic Clouds with a new processing of the complete archival data sets from the XMM-Newton and Chandra observatories in an attempt to trace the lowest propeller line below which accretion to polar caps is inhibited by the centrifugal force and the pulsa…
Transition Region and Chromospheric Signatures of Impulsive Heating Events. II. Modeling
Warren, Harry P.; Crump, Nicholas A.; Reep, Jeffrey W. +1 more
Results from the Solar Maximum Mission showed a close connection between the hard X-ray (HXR) and transition region (TR) emission in solar flares. Analogously, the modern combination of RHESSI and IRIS data can inform the details of heating processes in ways that were never before possible. We study a small event that was observed with RHESSI, IRI…
A Cold Flare with Delayed Heating
Fleishman, Gregory D.; Lysenko, Alexandra L.; Pal'shin, Valentin D. +3 more
Recently, a number of peculiar flares have been reported that demonstrate significant nonthermal particle signatures with low, if any, thermal emission, which implies a close association of the observed emission with the primary energy release/electron acceleration region. This paper presents a flare that appears “cold” at the impulsive phase, whi…
Origin of the Galactic Diffuse X-Ray Emission: Iron K-shell Line Diagnostics
Koyama, Katsuji; Nobukawa, Masayoshi; Uchiyama, Hideki +2 more
This paper reports detailed K-shell line profiles of iron (Fe) and nickel (Ni) of the Galactic Center X-ray Emission (GCXE), Galactic Bulge X-ray Emission (GBXE), Galactic Ridge X-ray Emission (GRXE), magnetic Cataclysmic Variables (mCVs), non-magnetic Cataclysmic Variables (non-mCVs), and coronally Active Binaries (ABs). For the study of the orig…
UV to IR Luminosities and Dust Attenuation Determined from ~4000 K-selected Galaxies at 1 < z < 3 in the ZFOURGE Survey
Papovich, Casey; Dickinson, Mark; Inami, Hanae +22 more
We build a set of composite galaxy spectral energy distributions (SEDs) by de-redshifting and scaling multi-wavelength photometry from galaxies in the ZFOURGE survey, covering the CDFS, COSMOS, and UDS fields. From a sample of ∼4000 Ks-band selected galaxies, we define 38 composite galaxy SEDs that yield continuous low-resolution spectr…
The Roll-over of Heliospheric Neutral Hydrogen below 100 eV: Observations and Implications
Wurz, P.; McComas, D. J.; Fuselier, S. A. +8 more
We present an improved analysis of the energy spectrum of energetic neutral hydrogen from the heliosheath observed with the IBEX-Lo sensor on the Interstellar Boundary EXplorer from the years 2009 to 2012. This analysis allows us to study the lowest energies between 10 and 100 eV although various background sources are more intense than the target…
Leveraging 3D-HST Grism Redshifts to Quantify Photometric Redshift Performance
Weiner, Benjamin J.; van Dokkum, Pieter G.; Franx, Marijn +10 more
We present a study of photometric redshift accuracy in the 3D-HST photometric catalogs, using 3D-HST grism redshifts to quantify and dissect trends in redshift accuracy for galaxies brighter than JH IR > 24 with an unprecedented and representative high-redshift galaxy sample. We find an average scatter of 0.0197 ± 0.0003(1 + z) in th…
Tracing p-mode Waves from the Photosphere to the Corona in Active Regions
Zhao, Junwei; Chen, Ruizhu; Felipe, Tobías +1 more
Atmosphere above sunspots is abundant with different types of waves. Among these waves are running penumbral waves in the chromosphere, quasi-periodic oscillations in the lower coronal loops, and recently reported running waves in sunspots’ photosphere, all of which were interpreted as magnetoacoustic waves by some authors. Are these waves in diff…
Analysis of Coronal Rain Observed by IRIS, HINODE/SOT, and SDO/AIA: Transverse Oscillations, Kinematics, and Thermal Evolution
Kohutova, P.; Verwichte, E.
Coronal rain composed of cool plasma condensations falling from coronal heights along magnetic field lines is a phenomenon occurring mainly in active region coronal loops. Recent high-resolution observations have shown that coronal rain is much more common than previously thought, suggesting its important role in the chromosphere-corona mass cycle…
A Very Compact Dense Galaxy Overdensity with δ ≃ 130 Identified at z ∼ 8: Implications for Early Protocluster and Cluster Core Formation
Ouchi, Masami; Harikane, Yuichi; Ishigaki, Masafumi
We report the first identification of a compact dense galaxy overdensity at z∼ 8 called A2744z8OD. A2744z8OD consists of eight Y-dropout galaxies behind Abell 2744 that were originally pinpointed by Hubble Frontier Fields studies. However, so far, no studies have derived the basic physical quantities of structure formation or made comparisons with…