Search Publications

DHIGLS: DRAO H I Intermediate Galactic Latitude Survey

Martin, P. G.; Kothes, R.; Lockman, Felix J. +5 more

Observations of Galactic H I gas for seven targeted regions at intermediate Galactic latitude are presented at 1^\prime angular resolution using data from the DRAO Synthesis Telescope (ST) and the Green Bank Telescope (GBT). The DHIGLS data are the most extensive arcminute-resolution measurements of the diffuse atomic interstellar medium…

Optical spectroscopic observations of gamma-ray blazar candidates. VII. Follow-up campaign in the southern hemisphere

Masetti, N.; Jiménez-Bailón, E.; Cheung, C. C. +15 more

Searching for low energy counterparts of γ-rays sources is one of the major challenges in modern γ-ray astronomy. In the third Fermi source catalog about 30% of detected sources are unide…

Mars Clouds

Daerden, Frank; Wolff, Michael J.; Clancy, R. Todd +2 more

Non-Maxwellian Analysis of the Transition-region Line Profiles Observed by the Interface Region Imaging Spectrograph

Polito, Vanessa; Del Zanna, Giulio; Testa, Paola +2 more

We investigate the nature of the spectral line profiles for transition-region (TR) ions observed with the Interface Region Imaging Spectrograph (IRIS). In this context, we analyzed an active-region observation performed by IRIS in its 1400 Å spectral window. The TR lines are found to exhibit significant wings in their spectral profiles, which can …

Solar Magnetoconvection and Small-Scale Dynamo. Recent Developments in Observation and Simulation

Solanki, S. K.; Borrero, J. M.; Schüssler, M. +1 more

A number of observational and theoretical aspects of solar magnetoconvection are considered in this review. We discuss recent developments in our understanding of the small-scale structure of the magnetic field on the solar surface and its interaction with convective flows, which is at the centre of current research. Topics range from plage areas …

Cloud Structure of Three Galactic Infrared Dark Star-forming Regions from Combining Ground- and Space-based Bolometric Observations

Li, Di; Qian, Lei; Ginsburg, Adam +12 more

We have modified the iterative procedure introduced by Lin et al., to systematically combine the submillimeter images taken from ground-based (e.g., CSO, JCMT, APEX) and space (e.g., Herschel, Planck) telescopes. We applied the updated procedure to observations of three well-studied Infrared Dark Clouds (IRDCs): G11.11-0.12, G14.225-0.506, and G28…

Reconstructing the high-energy irradiation of the evaporating hot Jupiter HD 209458b

Wheatley, Peter J.; Louden, Tom; Briggs, Kevin

The atmosphere of the exoplanet HD 209458b is undergoing sustained mass loss, believed to be caused by X-ray and extreme-ultraviolet (XUV) irradiation from its star. The majority of this flux is not directly observable due to interstellar absorption, but is required in order to correctly model the photoevaporation of the planet and photoionization…

Inferring the three-dimensional distribution of dust in the Galaxy with a non-parametric method . Preparing for Gaia

Bailer-Jones, C. A. L.; Fouesneau, M.; Rezaei Kh., S. +1 more

We present a non-parametric model for inferring the three-dimensional (3D) distribution of dust density in the Milky Way. Our approach uses the extinction measured towards stars at different locations in the Galaxy at approximately known distances. Each extinction measurement is proportional to the integrated dust density along its line of sight (…

Revealing structure and evolution within the corona of the Seyfert galaxy I Zw 1

Brandt, W. N.; Kriss, G. A.; Costantini, E. +3 more

X-ray spectral timing analysis is presented of XMM-Newton observations of the narrow-line Seyfert 1 galaxy I Zwicky 1 taken in 2015 January. After exploring the effect of background flaring on timing analyses, X-ray time lags between the reflection-dominated 0.3-1.0 keV energy and continuum-dominated 1.0-4.0 keV band are measured, indicative of re…

From Planck Data to Planck Era: Observational Tests of Holographic Cosmology

Afshordi, Niayesh; Corianò, Claudio; Delle Rose, Luigi +2 more

We test a class of holographic models for the very early Universe against cosmological observations and find that they are competitive to the standard cold dark matter model with a cosmological constant (Λ CDM ) of cosmology. These models are based on three-dimensional perturbative superrenormalizable quantum field theory (QFT), and, while they pr…