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The Overcontact Binary BO Arietis
Nelson, Robert H.
New radial velocity and photometric data for BO Ari have been obtained, and Roche-based simultaneous analysis of RV and light curve data for the system has been accomplished using the 2003 version of the Wilson-Devinney code. Values for the masses and radii have been obtained: M1 = 1.34 (2) Mʘ, M2 = 0.26 (1) M…
GALEX photometry of the open cluster NGC 752
Smith, Graeme H.
Ultraviolet photometry from the GALEX mission is compiled for a sample of main sequence stars and red giants in the open cluster NGC 752. This is one of the few ensembles of coveal near-solar abundance FGK stars for which near-ultraviolet and far-ultraviolet magnitudes are available from GALEX. Cluster members are identified on the basis of Gaia p…
The GATE summer school
Paunzen, E.; Skarka, M.; Janík, J. +1 more
The education activities in the form of short and condensed courses such as summer schools are essential parts of the educational process of every scientist. Here we briefly describe the program and the organization of the GATE summer school that was held in a form of virtual meeting between August 8 and 15 in Brno, Czech Republic.
The Circumstellar Gas of Phi Leonis in the UV
Eiroa, C.; Brown, Alexander; Grady, C. A. +2 more
HST UV spectra were obtained to study whether the φ Leo system has one or more stellar companions, as shown for the A-star dwarf, HR10, stellar pulsation, or transiting exocomets. During five partial HST observation sets spread over 13 months, redshifted gas with radial velocities up to +245 km s-1 was observed on one occasion, with low…
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…