Search Publications
Evolution of the Huygens Probe Spin During Parachute Descent
Lorenz, Ralph D.; Lebreton, Jean-Pierre; Leroy, Annie +1 more
Effects of flares on solar high-degree helioseismic acoustic mode amplitudes
Rabello Soares, M. Cristina; Baudin, Frédéric; Teixeira, Vanessa G.
Several attempts have been made to observe whether solar flares excite acoustic modes since Charles Wolff suggested this possibility almost 50 yr ago. We look for the impact of flares on the amplitude of solar acoustic modes and other effects that are also affecting the mode amplitude. Solar acoustic mode amplitudes are known to be sensitive to ma…
A Parametric Shape Model Applied to Tracing the Migration of the Objects Near an Asteroid
Yu, Y.; Yan, Z. J.; Gao, Y. F. +3 more
In the past decades, space missions to small bodies (Galileo, OSIRIS-REx, Hayabusa, Hayabusa2, Chang'e 2, Rosetta, etc.) have enriched us greatly with voluminous new knowledge on our solar system. In situ observations by these missions have revealed the extreme complexity and remarkable diversity of the spatial environment around their target aste…
Spatial distribution of the X-ray-emitting plasma of SS Cygni in quiescence and outburst
Maeda, Yoshitomo; Ishida, Manabu; Hayashi, Takayuki +2 more
We present our analysis of the Suzaku data of SS Cygni (SS Cyg) from 2005 both in quiescence and outburst. A fluorescent iron Kα line bears significant information about the geometry of an X-ray-emitting hot plasma and a cold reflector, such as the surfaces of the white dwarf (WD) and the accretion disk (AD). Our reflection simulation has revealed…
Observing the influence of the youngest super star clusters in NGC 1569: Keck Brackett α spectroscopy
Turner, Jean L.; Beck, Sara C.; Consiglio, S. Michelle +1 more
We report Keck-NIRSPEC observations of the Brackett α 4.05 µm recombination line across the two candidate embedded super star clusters (SSCs) in NGC 1569. These SSCs power a bright H II region and have been previously detected as radio and mid-infrared sources. Supplemented with high-resolution VLA mapping of the radio continuum along with I…
On the cryogenic nature of the large hills of Mars
Yakovlev, Valeriy; Horelik, Stanislav; Lytvynenko, Yuliia
The nature of large hills in the Martian equatorial regions like Zephyria Planum and the southern part of Elysium Planitia has not been studied, despite the fact that they have characteristic similar shapes and sharply contrast with the surrounding lava plains. The paper develops the previously proposed view on the permafrost injection nature of t…
A pair of UV nuclei or a compact star-forming region near the active nucleus in Mrk 766?
Singh, K. P.; Dewangan, G. C.; Deka, P. P. +1 more
We report the discovery of a bright, compact ultraviolet source at a projected separation of 1.1 kpc from the known active galactic nucleus (AGN) in Mrk 766 based on AstroSat/UVIT observations. We perform radial profile analysis and derive the UV flux almost free from the nearby contaminating sources. The new source is about 2.5 and 5.6 times fain…
gzK-colour-selected star-forming galaxies in the AKARI NEP-Deep Field
Goto, Tomotsugu; Pearson, Chris; Jeong, Woong-Seob +7 more
We study the clustering property and physical parameters of gzK-colour-selected star-forming galaxies (sgzKs) based on the Canada-France-Hawaii Telescope surveys over 0.55 deg2 in the AKARI North Ecliptic Pole-Deep Field. Two-point correlation functions for two magnitude-limited cases, Ks < 21.1 (N = 234) and Ks…
Impact of Ionospheric Ions on Magnetospheric Dynamics
Grigorenko, Elena E.; Ilie, Raluca; Kistler, Lynn +2 more
Constraints for Use of Ultraviolet Spectropolarimetry to Detect Chiral Amino Acids from Comets
Gómez de Castro, Ana I.; De Isidro-Gómez, Ana I.
Life is pervasive on planet Earth, but whether life is ubiquitous in the Galaxy and sustainable over timescales comparable to stellar evolution is unknown. Evidence suggests that life first appeared on Earth more than 3.77 Gyr ago, during a period of heavy meteoric bombardment. Amino acids, the building blocks of proteins, have been demonstrated t…