Search Publications
Missions
Journals
Publication Years
Influence of the Solar Global Magnetic-Field Structure Evolution on CMEs
Bilenko, Irina A.
We consider the influence of the solar global magnetic-field structure (GMFS) cycle evolution on the occurrence rate and parameters of coronal mass ejections (CMEs) in Solar Cycles 23 - 24. It has been shown that, over solar cycles, CMEs are not distributed randomly, but they are regulated by evolutionary changes in the GMFS. It is proposed that t…
SN 2005at - A neglected type Ic supernova at 10 Mpc
Kankare, E.; Kotak, R.; Monard, L. A. G. +7 more
We present a photometric and spectroscopic study of a reddened type Ic supernova (SN) 2005at. We report our results based on the available data of SN 2005at, including late-time observations from the Spitzer Space Telescope and the Hubble Space Telescope. In particular, late-time mid-infrared observations are something rare for type Ib/c SNe. In o…
Character and origin of Phobos’ grooves
Heggie, D. C.; Murray, J. B.
Phobos’ parallel grooves, which are such a striking feature of its surface, have attracted interest since their discovery on Viking images in 1976 (Veverka and Duxbury, 1977. J. Geophys. Res. 82, 4213-4223.), but their origin is still in dispute today. The great increase in knowledge of Phobos’ surface features effected by images from the High Res…
Kinematic Properties of Slow ICMEs and an Interpretation of a Modified Drag Equation for Fast and Moderate ICMEs
Tokumaru, M.; Fujiki, K.; Iju, T.
We report kinematic properties of slow interplanetary coronal mass ejections (ICMEs) identified by SOHO/LASCO, interplanetary scintillation, and in situ observations and propose a modified equation for the ICME motion. We identified seven ICMEs between 2010 and 2011 and compared them with 39 events reported in our previous work. We examined 15 fas…
New insights on the recoiling/binary black hole candidate J0927+2943 via molecular gas observations
Decarli, R.; Montuori, C.; Mazzucchelli, C. +2 more
The peculiar QSO J0927+2943 shows multiple sets of emission lines in its optical spectrum. This signature has been interpreted as the relative motion between a black hole, either recoiling or bound in a binary system, and its host galaxy, or as a superposition of two galaxies along the line of sight. In order to test these scenarios, we have colle…
MARSIS observations of the Martian nightside ionosphere dependence on solar wind conditions
Gurnett, D. A.; Němec, F.; Morgan, D. D. +1 more
Despite the absence of solar radiation on the Martian nightside, a weak, irregular, and variable ionosphere is produced there. The nightside ionosphere is thought to be maintained by two main sources: dayside-nightside plasma transport and electron precipitation. Observations by Mars Express (MEX) and Mars Global Surveyor (MGS) have shown that the…
A time-dependent photochemical model for Titan's atmosphere and the origin of H2O
Lara, L. M.; Lellouch, E.; Moreno, R. +2 more
Context. Titan's stratosphere contains oxygen compounds (CO, CO2, and H2O), implying an external source of oxygen whose nature is still uncertain. Recent observations from the Herschel Space Observatory using the HIFI and PACS instruments and the Cassini/CIRS, as well as steady-state photochemical modeling indicate that the a…
Modeling radiation belt electron acceleration by ULF fast mode waves, launched by solar wind dynamic pressure fluctuations
Zong, Q. -G.; Rankin, R.; Degeling, A. W.
We investigate the magnetospheric MHD and energetic electron response to a Storm Sudden Commencement (SSC) and subsequent magnetopause buffeting, focusing on an interval following an SSC event on 25 November 2001. We find that the electron flux signatures observed by LANL, Cluster, and GOES spacecraft during this event can largely be reproduced us…
The coronal energy input from magnetic braiding
Yeates, A. R.; Welsch, B. T.; Bianchi, F. +1 more
We estimate the energy input into the solar corona from photospheric footpoint motions, using observations of a plage region by the Hinode Solar Optical Telescope. Assuming a perfectly ideal coronal evolution, two alternative lower bounds for the Poynting flux are computed based on field line footpoint trajectories, without requiring horizontal ma…
Evolution and Dynamics of Orphan Penumbrae in the Solar Photosphere: Analysis from Multi-instrument Observations
Guglielmino, Salvo L.; Romano, Paolo; Zuccarello, Francesca
We investigate the dynamics and magnetic properties of orphan penumbrae observed in the solar photosphere to understand the formation process of such structures. We observed two orphan penumbrae in active region NOAA 11089 during a coordinated observing campaign carried out in 2010 July, involving the Hinode/Solar Optical Telescope (SOT) and Dutch…