Search Publications
More planetary candidates from K2 Campaign 5 using TRAN_K2
Kovacs, Geza
Context. The exquisite precision of space-based photometric surveys and the unavoidable presence of instrumental systematics and intrinsic stellar variability call for the development of sophisticated methods that distinguish these signal components from those caused by planetary transits.
Aims: Here, we introduce the standalone Fortran code …
The characteristics of the coronal mass ejections preceding the associated X-ray and γ-ray burst solar flares
Abdel-Sattar, Walid; Mawad, Ramy
In this study, investigated 14,786 coronal mass ejection (CME) events and 5092 Gamma-ray Burst Monitor (GBM) solar flare events (called γ-ray burst solar flare) recorded during 2008-2017, by using temporal and spatial conditions criteria, we found 845 (about 16%) CME events associated with γ-ray burst solar flare events only (hereafter, CME-γ-pref…
IVOA HiPS implementation in the framework of WorldWide Telescope
Li, S.; Li, C.; Xu, Y. +9 more
The WorldWide Telescope(WWT) is a scientific visualization platform which can browse deep space images, star catalogs, and planetary remote sensing data from different observation facilities in a three-dimensional virtual scene. First launched and then open-sourced by Microsoft Research, the WWT is now managed by the American Astronomical Society …
[Rb/Zr] ratio in Ba stars as a diagnostic of the companion AGB stellar mass
Shejeelammal, J.; Goswami, Aruna
Understanding nucleosynthesis in and evolution of asymptotic giant branch (AGB) stars is of primary importance as these stars are the main producers of some of the key elements in the Universe. They are the predominant sites for slow-neutron-capture nucleosynthesis (s-process). The exact physical conditions and nucleosynthetic processes occurring …
Star formation rates in the L 1482 filament of the California molecular cloud
Shimajiri, Yoshito; Sunada, Kazuyoshi; Dobashi, Kazuhito +7 more
We measured the trigonometric parallax of the H2O maser source associated with the L 1482 molecular filament hosting the most massive young star, LkHα 101, in the California molecular cloud. The measured parallax is 1.879 ± 0.096 mas, corresponding to the distance of 532 ± 28 pc. This parallax is consistent with that of the nearby star …
The Initiation of a Solar Streamer Blowout Coronal Mass Ejection Arising from the Streamer Flank
Chen, Yao; Zheng, Ruisheng; Wang, Bing
Streamer blowout (SBO) coronal mass ejections (CMEs) represent a particular class of CMEs that are characterized by a gradual swelling of the overlying streamer and a slow CME containing a flux-rope structure. SBO CMEs arising from the streamer flank fall into a special category of SBO CMEs involving three lower arches under the higher streamer ar…
Discovery of annular X-ray emission centered on MAXI J1421-613: Dust-scattering X-rays?
Nobukawa, Masayoshi; Nobukawa, Kumiko K.; Yamauchi, Shigeo
We report the discovery of an annular emission of $\sim\!\! {3^{\prime }}\!-\!{9^{\prime }}$ radius around the center of a transient source, the X-ray burster MAXI J1421-613, in the Suzaku follow-up analysis. The spectrum of the annular emission shows no significant emission-line structure, and is well explained by an absorbed power-law model with…
DX Cygni: A triple system with mass transfer
Wolf, M.; Mašek, M.; Kučáková, H. +2 more
A dozen of new precise times of eclipses were measured for the eclipsing binary DX Cygni as a part of our long-term observational project for studying neglected eclipsing binaries with a short orbital period. Based on a current O - C diagram, we found for the first time that its period is increasing (dP / P = 1.68 ×10-7 day/years) and t…
A GALEX far-ultraviolet study of quasi-coeval samples of red giants
Smith, Graeme H.; Cochrane, Kevin M.
Samples of red giant branch (RGB) stars have been compiled from the literature for seven moving groups, and searches made for both GALEX FUV and Johnson
The Subjectivity in Identification of Martian Channel Networks and Its Implication for Citizen Science Projects
Jones, M.; Bahia, R. S.
The Martian surface is incised by numerous valley networks, which indicate the planet experienced sustained widespread flowing water in the past (e.g. Carr in Water on Mars, Oxford University Press, New York, 1996; Phil Trans R Soc A 370:2193–2212, 2012. https://doi.org/10.1098/rsta.2011.0500). Examining the distribution and geometries of these va…