Search Publications
Gas terminal velocity from MIRO/Rosetta data using neural network approach
Hartogh, P.; Crovisier, J.; Ip, W. H. +8 more
Context. The Microwave Instrument on the Rosetta Orbiter (MIRO) on board the Rosetta spacecraft was designed to investigate the surface and gas activity of the comet 67P/Churyumov-Gerasimenko. The MIRO spectroscopic measurements carry information about the velocity of gas emanating from the nucleus surface. Knowledge of the terminal velocity of th…
SpiKeS: Precision Warm Spitzer Photometry of the Kepler Field
Gorjian, Varoujan; Stark, Christopher C.; Lowrance, Patrick J. +11 more
The ∼200,000 targets monitored for photometric variability during the Kepler prime mission include the best-studied group of stars in the sky, due both to the extensive time history provided by Kepler and to the substantial amount of ancillary data provided by other investigators or compiled by the Kepler team. To complement this wealth of data, w…
Successive Coronal Mass Ejections Associated with Weak Solar Energetic Particle Events
Lugaz, Noé; Zhuang, Bin; Gou, Tingyu +1 more
The scenario of twin coronal mass ejections (CMEs), i.e., a fast and wide primary CME (priCME) preceded by preceding CMEs (preCMEs), has been found to be favorable to a more efficient particle acceleration in large solar energetic particle (SEP) events. Here we study 19 events during 2007-2014 associated with twin-CME eruptions but without large S…
The spectral scalings of magnetic fluctuations upstream and downstream of the Venusian bow shock
Zhang, T. L.; Chen, Y. Q.; Wang, G. Q. +2 more
We statistically investigate the spectral scalings of magnetic fluctuations at the upstream and downstream regions near the Venusian bow shock and perform a differentiation by shock geometry. Based on the Venus Express data, 115 quasi-parallel (
Correction to: SERENA: Particle Instrument Suite for Determining the Sun-Mercury Interaction from BepiColombo
Kallio, E.; Schmidt, W.; Barabash, S. +118 more
A Correction to this paper has been published: https://doi.org/10.1007/s11214-021-00809-8
Occurrence Rate of Radio-Loud and Halo CMEs in Solar Cycle 25: Prediction Using their Correlation with the Sunspot Number
Moon, Y. -J.; Pappa Kalaivani, P.; Prakash, O. +1 more
Solar coronal mass ejections (CMEs) are known for their space-weather and geomagnetic consequences. Among all CMEs, the so-called radio-loud (RL) and halo CMEs are considered the most energetic in the sense that they are usually faster and wider than the general population of CMEs. Hence the study of RL and halo CMEs has become important and the p…
Determination of the Venus eddy diffusion profile from CO and CO2 profiles using SOIR/Venus Express observations
Vandaele, A. C.; Robert, S.; Mahieux, A. +6 more
We present a study of the SOIR/Venus Express CO2 and CO profiles in order to constrain the eddy diffusion profile in the Venus mesosphere (80 to 130 km of altitude). We compute the mean number density profile of both species, and the hydrostatic temperature based on the CO2 mean density profile. We use a 1D-photochemical/diff…
Morphology of Jupiter's Polar Auroral Bright Spot Emissions via Juno UVS Observations
Bonfond, B.; Vogt, M. F.; Gérard, J. -C. +12 more
Since 2016, the Juno UVS (Ultraviolet Spectrograph) instrument has been taking spectral images of Jupiter's auroras in their full extent, including the nightside, which cannot be viewed from Earth. We present a systematic analysis of features in Jupiter's polar auroras called auroral bright spots, which were observed by Juno UVS during the first 2…
Preview of Comet C/2021 A1 (Leonard) and Its Encounter with Venus
Zhang, Qicheng; Farnham, Tony L.; Knight, Matthew M. +2 more
Long-period comet C/2021 A1 (Leonard) will approach Venus to within 0.029 au on 2021 December 18 and may subsequently graze the planet with its dust trail less than 2 days later. We observed C/2021 A1 with the Lowell Discovery Telescope on 2021 January 13 and March 3, as well as with the Palomar Hale Telescope on 2021 March 20, while the comet was…
HAT-P-68b: A Transiting Hot Jupiter around a K5 Dwarf Star
Torres, Guillermo; Bieryla, Allyson; Latham, David W. +23 more
We report the discovery by the ground-based Hungarian-made Automated Telescope Network (HATNet) survey of the transiting exoplanet HAT-P-68b, which has a mass of 0.724 ± 0.043 MJ, and radius of 1.072 ± 0.012 RJ. The planet is in a circular P = 2.2984 day orbit around a moderately bright V = 13.937 ± 0.030 magnitude K-dwarf st…