Search Publications
New results and questions of lunar exploration from SELENE, Chang'E-1, Chandrayaan-1 and LRO/LCROSS
Jin, Shuanggen; Arivazhagan, Sundaram; Araki, Hiroshi
The moon has longstanding questions such as lunar environments, origin, formation and evolution, magnetization of crustal rocks, internal structure and possible life. The recent lunar missions, e.g., SELenological and ENgineering Explorer "KAGUYA" (SELENE), Chang'E-1, Chandrayaan-1, and Lunar Reconnaissance Orbiter/Lunar CRater Observation and Sen…
Solar energetic particle events during the rise phases of solar cycles 23 and 24
Srivastava, A. K.; Chandra, R.; Gopalswamy, N. +13 more
We present a comparative study of the properties of coronal mass ejections (CMEs) and flares associated with the solar energetic particle (SEP) events in the rising phases of solar cycles (SC) 23 (1996-1998) (22 events) and 24 (2009-2011) (20 events), which are associated with type II radio bursts. Based on the SEP intensity, we divided the events…
Observations of supergiant fast X-ray transients with LOFT
Esposito, P.; Romano, P.; Ferrigno, C. +2 more
Supergiant fast X-ray transients are a subclass of high mass X-ray binaries displaying a peculiar and still poorly understood extreme variability in the X-ray domain. These sources undergo short sporadic outbursts (L∼ 1036-1037 erg s-1), lasting few ks at the most, and spend a large fraction of their tim…
CMEs and active regions on the sun
Yashiro, Seiji; Michalek, Grzegorz
The relationship between active regions (ARs) and coronal mass ejections (CMEs) is studied. For this purpose a statistical analysis of 694 CMEs associated with ARs was carried out. We considered the relationship between properties of the CMEs and ARs characterized using the McIntosh classification. We demonstrated that CMEs are likely to be launch…
A view of supernova remnant CTB 37A with the Fermi Gamma-ray Space Telescope
Fermi-LAT Collaboration; Brandt, T. J.
Supernovae and their remnants have long been favored as cosmic ray accelerators. Recent data from the Fermi Gamma-ray Space Telescope has given us an improved window into such sources, including the remnant CTB 37A. Using the Fermi Large Area Telescope, we found significant gamma-ray emission coincident with the remnant, which also emits in radio,…
A statistical study of post-flare-associated CME events
Youssef, M.; Mawad, R.; shaltout, Mosalam
We present a statistical study of post-flare-associated CMEs (PFA-CMEs) during the period from 1996 to 2010. By investigating all CMEs and X-ray flares, respectively, in the LASCO and GOES archives, we found 15875 CMEs of which masses are well measured and 25112 X-ray flares of which positions are determined from their optical counterparts. Under …
Meteoric ion layers in the ionospheres of venus and mars: Early observations and consideration of the role of meteor showers
Christou, A. A.; Withers, Paul; Vaubaillon, J.
Layers of metal ions produced by meteoroid ablation have been known in Earth's ionosphere for decades, but have only recently been discovered at Venus and Mars. Here we report the results of a search for meteoric layers in earlier datasets from Venus and Mars. We find 13 candidates at Venus in Mariner 10, Venera 9/10, and Pioneer Venus Orbiter dat…
Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection
Dandouras, I.; Santolík, O.; Rème, H. +6 more
The whistler-mode waves and electron temperature anisotropy play a key role prior to and during magnetic reconnection. On August 21, 2002, the Cluster spacecrafts encountered a quasi-collisionless magnetic reconnection event when they crossed the plasma sheet. Prior to the southward turning of magnetospheric magnetic field and high speed ion flow,…
Spatial heterogeneity in the radiogenic activity of the lunar interior: Inferences from CHACE and LLRI on Chandrayaan-1
Bhardwaj, Anil; Sridharan, R.; Ahmed, S. M. +3 more
In the past, clues on the potential radiogenic activity of the lunar interior have been obtained from the isotopic composition of noble gases like Argon. Excess Argon (40) relative to Argon (36), as compared to the solar wind composition, is generally ascribed to the radiogenic activity of the lunar interior. Almost all the previous estimates were…
Universal scaling laws for fully-developed magnetic field turbulence near and far upstream of the Earth's bow shock
Miranda, Rodrigo A.; Chian, Abraham C. -L.; Rempel, Erico L.
We analyze the multifractal scaling of the modulus of the interplanetary magnetic field near and far upstream of the Earth's bow shock, measured by Cluster and ACE, respectively, from 1 to 3 February 2002. The maximum order of the structure function is carefully estimated for each time series using two different techniques, to ensure the validity …