Search Publications
Multiple Plasma Ejections and Intermittent Nature of Magnetic Reconnection in Solar Chromospheric Anemone Jets
Shibata, K.; Isobe, H.; Singh, K. A. P. +2 more
The recent discovery of chromospheric anemone jets with the Solar Optical Telescope (SOT) on board Hinode has shown an indirect evidence of magnetic reconnection in the solar chromosphere. However, the basic nature of magnetic reconnection in chromosphere is still unclear. We studied nine chromospheric anemone jets from SOT/Hinode using Ca II H fi…
Probing the Role of Carbon in Ultraviolet Extinction along Galactic Sight Lines
Murthy, J.; Babu, B. R. S.; Parvathi, V. S. +1 more
We report previously undetermined interstellar gas and dust-phase carbon abundances along 15 Galactic sight lines based on archival data of the strong 1334.5323 Å transition observed with the Space Telescope Imaging Spectrograph. These are combined with previously reported carbon measurements along six sight lines to produce a complete sample of i…
Chronology of deposition and alteration in the Mawrth Vallis region, Mars
Mangold, N.; Bibring, J. -P.; Loizeau, D. +2 more
The Mawrth Vallis area displays some of the largest phyllosilicate-rich outcrops of Mars, on Noachian highlands. The Mawrth Vallis region is located just at the dichotomy boundary between the Noachian highlands and the younger, northern lowlands. A large, thick, layered clay-rich unit is present throughout the inter-crater plateaus. Clay-rich laye…
Variability-selected Low-luminosity Active Galactic Nuclei in the 4 Ms Chandra Deep Field-South
Lehmer, B. D.; Alexander, D. M.; Bauer, F. E. +8 more
The 4 Ms Chandra Deep Field-South (CDF-S) and other deep X-ray surveys have been highly effective at selecting active galactic nuclei (AGNs). However, cosmologically distant low-luminosity AGNs (LLAGNs) have remained a challenge to identify due to significant contribution from the host galaxy. We identify long-term X-ray variability (~month-years,…
The Spectral Energy Distributions and Infrared Luminosities of z ≈ 2 Dust-obscured Galaxies from Herschel and Spitzer
Dey, Arjun; Bussmann, R. S.; Alberts, Stacey +6 more
Dust-obscured galaxies (DOGs) are a subset of high-redshift (z ≈ 2) optically-faint ultra-luminous infrared galaxies (ULIRGs, e.g., L IR > 1012 L ⊙). We present new far-infrared photometry, at 250, 350, and 500 µm (observed-frame), from the Herschel Space Telescope for a large sample of 113 DOGs with spect…
Mid- and far-infrared absorption spectroscopy of Titan’s aerosols analogues
Vinatier, Sandrine; Mahjoub, Ahmed; Anderson, Carrie M. +7 more
In this work we present mid- and far-infrared absorption spectra of Titan’s aerosol analogues produced in the PAMPRE experimental setup. The evolution of the linear absorption coefficient ɛ (cm-1) is given as a function of the wavenumber.
We provide a complete dataset regarding the influence that the concentration of methane vapor …Defining the "Blind Spot" of Hinode EIS and XRT Temperature Measurements
Golub, Leon; Winebarger, Amy R.; Warren, Harry P. +4 more
Observing high-temperature, low emission measure plasma is key to unlocking the coronal heating problem. With current instrumentation, a combination of EUV spectral data from Hinode Extreme-ultraviolet Imaging Spectrometer (EIS; sensitive to temperatures up to 4 MK) and broadband filter data from Hinode X-ray Telescope (XRT; sensitive to higher te…
Rapid Coeval Black Hole and Host Galaxy Growth in MRC 1138-262: The Hungry Spider
Altieri, B.; Valtchanov, I.; Stern, D. +30 more
We present a detailed study of the infrared spectral energy distribution of the high-redshift radio galaxy MRC 1138-26 at z = 2.156, also known as the Spiderweb Galaxy. By combining photometry from Spitzer, Herschel, and LABOCA we fit the rest-frame 5-300 µm emission using a two-component, starburst, and active galactic nucleus (AGN) model. …
A Global Two-temperature Corona and Inner Heliosphere Model: A Comprehensive Validation Study
Fedorov, A.; Llebaria, A.; Lamy, P. L. +9 more
The recent solar minimum with very low activity provides us a unique opportunity for validating solar wind models. During CR2077 (2008 November 20 through December 17), the number of sunspots was near the absolute minimum of solar cycle 23. For this solar rotation, we perform a multi-spacecraft validation study for the recently developed three-dim…
A computational and theoretical analysis of falling frequency VLF emissions
Omura, Yoshiharu; Nunn, David
Recently much progress has been made in the simulation and theoretical understanding of rising frequency triggered emissions and rising chorus. Both PIC and Vlasov VHS codes produce risers in the region downstream from the equator toward which the VLF waves are traveling. The VHS code only produces fallers or downward hooks with difficulty due to …