Search Publications
The Wave Origins of Longitudinal Structures in ExoMars Trace Gas Orbiter (TGO) Aerobraking Densities
González-Galindo, Francisco; Forget, Francois; Forbes, Jeffrey M. +4 more
The nature and origins of longitudinal density structures in Mars' thermosphere between 100 and 120 km altitude, and -30° and -75° latitude around winter solstice (Ls = 70-122°), as measured by the accelerometer on the ExoMars Trace Gas Orbiter (TGO) Mission, are investigated. The methodology consists of deducing the responsible waves by comparing…
The aftermath of nova Centauri 2013 (V1369 Centauri)
Howell, Steve B.; Shore, Steven N.; Kuin, Paul +3 more
Context. Classical nova progenitors are cataclysmic variables and very old novae are observed to match systems with high mass transfer rates and (relatively) long orbital periods. However, the aftermath of a classical nova has never been studied in detail.
Aims: We intend to probe the aftermath of a classical nova explosion in cataclysmic var…
Fast outflows in protoplanetary nebulae and young planetary nebulae observed by Herschel/HIFI
Teyssier, D.; García-Lario, P.; Alcolea, J. +4 more
Context. Fast outflows and their interaction with slow shells (generally known as the fossil circumstellar envelope of asymptotic giant branch stars) play an important role in the structure and kinematics of protoplanetary and planetary nebulae (pPNe, PNe). To properly study their effects within these objects, we also need to observe the intermedi…
BG Tri: an example of a low-inclination RW Sex-type nova-like
Gänsicke, B. T.; Steeghs, D.; Rodríguez-Gil, P. +4 more
We analyse a wealth of optical spectroscopic and photometric observations of the bright (V = 11.9) cataclysmic variable BG Tri. The Gaia DR2 parallax gives a distance d = 334(8) pc to the source, making the object one of the intrinsically brightest nova-like variables seen under a low orbital inclination angle. Time-resolved spectroscopic observat…
Gravity Wave Packets in the Venusian Atmosphere Observed by Radio Occultation Experiments: Comparison With Saturation Theory
Tellmann, Silvia; Pätzold, Martin; Mori, Ryota +3 more
The characteristics of gravity wave packets in the Venusian atmosphere were studied using high-vertical-resolution temperature profiles obtained by ESA's Venus Express and JAXA's Akatsuki radio occultation experiments with radio holographic methods. Localized disturbances were detected by applying a wavelet transform to the temperature profiles. T…
Emission line galaxies in the SHARDS Frontier Fields - I. Candidate selection and the discovery of bursty Hα emitters
Pérez-González, Pablo G.; Conselice, Christopher J.; Ferreira, Leonardo +7 more
Emission line galaxies provide a crucial tool for the study of galaxy formation and evolution, providing a means to trace a galaxy's star formation history or metal enrichment, and to identify galaxies at a range of stellar masses. In this paper, we present a study of emission line galaxies in the Survey for High-z Absorption Red and Dead Sources …
Soft gamma-ray selected giant radio galaxies: an update
Masetti, N.; Venturi, T.; Dallacasa, D. +9 more
We present an update on the sample of soft gamma-ray selected giant radio galaxies (GRGs) extracted from INTEGRAL/IBIS and Swift/BAT surveys; it includes eight new sources and one candidate object. In the new sample, all but one source display FR II radio morphologies; the only exception is B21144+35B, which is an FR I. The objects belong to both …
Determining Threshold Instrumental Resolutions for Resolving the Velocity Space Signature of Ion Landau Damping
Klein, K. G.; Verniero, J. L.; Howes, G. G. +1 more
Unraveling the physics of the entire turbulent cascade of energy in space and astrophysical plasmas from the injection of energy at large scales to the dissipation of that energy into plasma heat at small scales, represents an overarching, open question in heliophysics and astrophysics. The fast cadence and high phase space resolution of particle …
On the vanishing orbital X-ray variability of the eclipsing binary millisecond pulsar 47 Tuc W
Heinke, C. O.; Romani, R. W.; Freire, P. C. C. +2 more
Redback millisecond pulsars (MSPs) typically show pronounced orbital variability in their X-ray emission due to our changing view of the intrabinary shock (IBS) between the pulsar wind and stellar wind from the companion. Some redbacks ('transitional' MSPs) have shown dramatic changes in their multiwavelength properties, indicating a transition fr…
HD 76920 b pinned down: A detailed analysis of the most eccentric planetary system around an evolved star
Mustill, A. J.; Wittenmyer, R. A.; Pollard, K. R. +9 more
We present 63 new multi-site radial velocity (RV) measurements of the K1III giant HD 76920, which was recently reported to host the most eccentric planet known to orbit an evolved star. We focused our observational efforts on the time around the predicted periastron passage and achieved near-continuous phase coverage of the corresponding RV peak. …