Search Publications
Formation of lobate debris aprons on Mars: Assessment of regional ice sheet collapse and debris-cover armoring
Head, James W.; Fastook, James L.; Marchant, David R.
Lobate debris aprons (LDA) are lobate-shaped aprons surrounding scarps and isolated massifs that are concentrated in the vicinity of the northern Dichotomy Boundary on Mars. LDAs have been interpreted as (1) ice-cemented talus aprons undergoing viscous flow, (2) local debris-covered alpine-like glaciers, or (3) remnants of the collapse of a region…
The 100-month Swift catalogue of supergiant fast X-ray transients. I. BAT on-board and transient monitor flares
Gehrels, N.; Esposito, P.; Ducci, L. +10 more
Context. Supergiant fast X-ray transients (SFXTs) are high mass X-ray binaries (HMXBs) that are defined by their hard X-ray flaring behaviour. During these flares they reach peak luminosities of 1036-1037 erg s-1 for a few hours (in the hard X-ray), which are much shorter timescales than those characterizing Be/X-r…
The semi-constrained NMSSM satisfying bounds from the LHC, LUX and Planck
Ellwanger, Ulrich; Hugonie, Cyril
We study the parameter space of the semi-constrained NMSSM, compatible with constraints on the Standard Model like Higgs mass and signal rates, constraints from searches for squarks and gluinos, a dark matter relic density compatible with bounds from WMAP/Planck, and direct detection cross sections compatible with constraints from LUX. We consider…
The Density and Mass of Unshocked Ejecta in Cassiopeia A through Low Frequency Radio Absorption
Rudnick, Lawrence; Perley, R. A.; DeLaney, Tracey +1 more
Characterizing the ejecta in young supernova remnants is a requisite step toward a better understanding of stellar evolution. In Cassiopeia A the density and total mass remaining in the unshocked ejecta are important parameters for modeling its explosion and subsequent evolution. Low frequency (<100 MHz) radio observations of sufficient angular…
Spectral Energy Distribution Fitting of HETDEX Pilot Survey Lyα Emitters in COSMOS and GOODS-N
Finkelstein, Steven L.; Schneider, Donald P.; Bridge, Joanna +15 more
We use broadband photometry extending from the rest-frame UV to the near-IR to fit the individual spectral energy distributions of 63 bright (L(Lyα) > 1043 erg s-1) Lyα emitting galaxies (LAEs) in the redshift range 1.9 < z < 3.6. We find that these LAEs are quite heterogeneous, with stellar masses that span over thr…
Optical - near-infrared catalog for the AKARI north ecliptic pole Deep field
Goto, Tomotsugu; Ohyama, Youichi; Pearson, Chris +9 more
Aims: We present an 8-band (u∗, g', r', i', z', Y, J, Ks) optical to near-infrared deep photometric catalog based on the observations made with MegaCam and WIRCam at the CFHT, and compute photometric redshifts, zp in the north ecliptic pole (NEP) region. AKARI infrared satellite carried out a deep survey in th…
Radio Imaging of a Type IVM Radio Burst on the 14th of August 2010
Krucker, S.; Bain, H. M.; Saint-Hilaire, P. +1 more
Propagating coronal mass ejections (CMEs) are often accompanied by burst signatures in radio spectrogram data. We present Nançay Radioheliograph observations of a moving source of broadband radio emission, commonly referred to as a type IV radio burst (type IVM), which occurred in association with a CME on the 14th of August 2010. The event was we…
Small-scale chromospheric jets above a sunspot light bridge
Ichimoto, Kiyoshi; Louis, Rohan E.; Beck, Christian
Context. The chromosphere above sunspot umbrae and penumbrae shows several different types of fast dynamic events such as running penumbral waves, umbral flashes, and penumbral microjets.
Aims: The aim of this paper is to identify the physical driver responsible for the dynamic and small-scale chromospheric jets above a sunspot light bridge. …
A connection between accretion state and Fe K absorption in an accreting neutron star: black hole-like soft-state winds?
Ponti, Gabriele; Muñoz-Darias, Teodoro; Fender, Robert P.
High-resolution X-ray spectra of accreting stellar-mass black holes reveal the presence of accretion disc winds, traced by high-ionization Fe K lines. These winds appear to have an equatorial geometry and to be observed only during disc-dominated states in which the radio jet is absent. Accreting neutron star systems also show equatorial high-ioni…
XMM-Newton observations reveal the disappearance of the wind in 4U 1630-47
Díaz Trigo, M.; Guainazzi, M.; Miller-Jones, J. C. A. +1 more
We report on XMM-Newton observations of the black hole X-ray binary 4U 1630-47 during its 2012-2013 outburst. The first five observations monitor the source as its luminosity increases across the high-soft state of accretion. In the sixth observation the source has made a transition to an "anomalous" state, characterised by a significant contribut…