Search Publications
Energetic Electron Periodicities During the Cassini Grand Finale
Krupp, N.; Roussos, E.; Mitchell, D. G. +2 more
The Cassini F ring and Proximal orbits took the spacecraft closer to Saturn than any previous mission and allowed determination of energetic charged particles (E > 20 keV) in the inner magnetosphere of the planet. The periodicities of the energetic electrons show a remarkable consistency when analyzed using Lomb periodograms. From the beginning…
Cross-calibration of the Rosetta Navigation Camera based on images of the 67P comet nucleus
Statella, Thiago; Geiger, Bernhard
The Rosetta spacecraft carried a Navigation Camera (NavCam) for optical navigation in the vicinity of the comet. In order to facilitate the use of the data for quantitative scientific work, we performed a cross-calibration study based on images taken with the OSIRIS near-angle camera. For this purpose, we selected sets of images acquired roughly s…
The amplitude of the cross-covariance function of solar oscillations as a diagnostic tool for wave attenuation and geometrical spreading
Gizon, Laurent; Birch, Aaron C.; Nagashima, Kaori +1 more
Context. In time-distance helioseismology, wave travel times are measured from the two-point cross-covariance function of solar oscillations and are used to image the solar convection zone in three dimensions. There is, however, also information in the amplitude of the cross-covariance function, for example, about seismic wave attenuation.
Ai…
On the Relation of Silicates and SiO Maser in Evolved Stars
Jiang, Biwei; Liu, Jiaming
The SiO molecule is one of the candidates for the seed of silicate dust in the circumstellar envelope of evolved stars, but this opinion is challenged. In this work we investigate the relation of the SiO maser emission power and the silicate dust emission power. With both our own observation by using the PMO/Delingha 13.7 m telescope and archive d…
A Bayesian Approach to Period Searching in Solar Coronal Loops
McKenzie, David; Scherrer, Bryan
We have applied a Bayesian generalized Lomb-Scargle period searching algorithm to movies of coronal loop images obtained with the Hinode X-ray Telescope (XRT) to search for evidence of periodicities that would indicate resonant heating of the loops. The algorithm makes as its only assumption that there is a single sinusoidal signal within each lig…
Discovery of a Rapid, Luminous Nova in NGC 300 by the KMTNet Supernova Program
Kim, Dong-Jin; Lee, Yongseok; Moon, Dae-Sik +3 more
We present the discovery of a rapidly evolving transient by the Korean Microlensing Telescope Network Supernova Program (KSP). KSP is a novel high-cadence supernova survey that offers deep (∼21.5 mag in BV I bands), nearly continuous wide-field monitoring for the discovery of early and/or fast optical transients. KSP-OT-201509a, reported here, was…
General circulation of Venus from a long-term synoptic study of tropospheric CO by Venus Express/VIRTIS
Tsang, Constantine C. C.; McGouldrick, Kevin
The understanding of spatial and temporal variations in tropospheric abundances of the trace gas carbon monoxide (CO) is key to understanding the deep atmospheric circulation on Venus. CO is entrained in the global circulation, as well as being key ingredients in the multi-reaction chemical cycle that creates and destroys the sulfuric acid that is…
Inferring Compton-thick AGN candidates at z > 2 with Chandra using the >8 keV rest-frame spectral curvature
Treister, E.; Salvato, M.; Comastri, A. +10 more
To fully understand cosmic black hole growth, we need to constrain the population of heavily obscured active galactic nuclei (AGNs) at the peak of cosmic black hole growth (z ∼1-3). Sources with obscuring column densities higher than 1024 atoms cm-2, called Compton-thick (CT) AGNs, can be identified by excess X-ray emission a…
Regional surface morphology of comet 67P/Churyumov-Gerasimenko from Rosetta/OSIRIS images: The southern hemisphere (Corrigendum)
Jorda, L.; Lamy, P. L.; Lara, L. M. +49 more
CARMA observations of massive Planck -discovered cluster candidates at z ≳ 0.5 associated with WISE overdensities: breaking the size-flux degeneracy
Shimwell, T.; Melin, J. -B.; Feroz, F. +4 more
We use a Bayesian software package to analyse CARMA-8 data towards 19 unconfirmed Planck Sunyaev-Zel'dovich-cluster candidates from Rodríguez-Gonzálvez et al. that are associated with significant overdensities in WISE. We use two cluster parameterizations, one based on a (fixed shape) generalized-NFW (gNFW) pressure profile and another on a β gas …