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Photometric Analysis of Two K Spectral Type Contact Binary Systems
Aceves, H.; Michel, R.; Popov, V. +3 more
The first analysis of the light curves of contact binaries ROTSE J135349.8+305205 (CB1) and 1SWASP J150957.5‑115308 (CB2) using the Wilson-Devinney code is presented. Both binary systems are of the A-subtype with a shallow fill-out (20.8% and 15.8% respectively) and a difference in temperatures between the components of < 200 K. A mass-ratio of…
A Matched Survey for the Enigmatic Low Radio Frequency Transient ILT J225347+862146
Hallinan, Gregg; Sharma, Yashvi; Huang, Yuping +3 more
Discovered in 2011 with LOFAR, the 15 Jy low-frequency radio transient ILT J225347+862146 heralds a potentially prolific population of radio transients at <100 MHz. However, subsequent transient searches in similar parameter space yielded no detections. We test the hypothesis that these surveys at comparable sensitivity have missed the populati…
Determining the Spectral Content of MOSES Images
Kankelborg, Charles C.; Parker, Jacob D.
The Multi-Order Solar Extreme Ultraviolet Spectrograph (MOSES) sounding rocket was launched from White Sands Missile Range on 2006 February 8th, to capture images of the Sun in the He II 303.8 Å emission line. MOSES is a slitless spectrograph that forms images in multiple spectral orders simultaneously using a concave diffraction grating in an eff…
Probable ice-rich deposits on north-facing slopes in Alba Patera, Mars
Gregg, Tracy K. P.; Schiff, Nicholas L. G.
We examine unconformable lobate deposits along the north-facing slopes of Alba Patera (40°N, 250°E with an elevation of ~6 km), Mars, using data from the Mars Reconnaissance Orbiter Context Camera, High-Resolution Imaging Science Experiment, and the Mars Orbiter Laser Altimeter. We interpret the lobate north-facing slope deposits (NSFDs) to be sma…
Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099) - II. Potential X-ray counterparts and variable sources
Zurek, David R.; Kroupa, Pavel; Long, Knox S. +4 more
We present a far-ultraviolet (FUV) study of the globular cluster M30 (NGC 7099). The images were obtained using the Advanced Camera for Surveys (ACS/SBC, F150LP, FUV) and the Wide Field Planetary Camera 2 (WFPC2; F300W, UV) on board the Hubble Space Telescope (HST). We compare the catalogue of FUV objects to 10 known X-ray sources and find six con…
Detection of the tidal deformation of WASP-103b at 3 σ with CHEOPS (Corrigendum)
Alonso, R.; Bouchy, F.; Deleuil, M. +81 more
New Apsidal Motion in Four Eccentric Eclipsing Binaries: V610 Car, V944 Cep, V2815 Ori and V1260 Tau
Bulut, Ahmet
This paper presents an apsidal motion analysis. The apsidal motion analysis of the eccentric eclipsing binaries V610 Car (P = 4.84 days), V944 Cep (P = 6.56 days), V2815 Ori (P = 2.13 days), and V1260 Tau (P = 5.43 days) was performed using minima times from the O-C Gateway database, ASAS-3, ASAS-SN, and TESS, following Lacy's approach. The rates …
Physical Calibrations of the FREND Instrument Installed Onboard TGO Martian Orbiter
Mitrofanov, I. G.; Golovin, D. V.; Litvak, M. L. +10 more
The article presents results of ground calibrations of the FREND neutron telescope installed onboard the TGO spacecraft of the Russian-European ExoMars project. The main goal of the FREND space experiment is to measure hydrogen content in the subsurface layer of Mars to a depth of 1 m. High resolution maps of water mass fraction in the regolith ar…
Searching for shell stars in LAMOST DR4 by probing the Fe 42 multiplet lines
Paunzen, Ernst; Hümmerich, Stefan; Bernhard, Klaus
Shell stars, in particular the cooler ones, often do not show conspicuous Balmer-line emission and may consequently be missed in surveys that specifically search for emission signatures in the H α line. This work is aimed at identifying stars with shell-signatures via a search for strong Fe II multiplet 42 lines at λλ4924, 5018, 5169 Å in archival…
Simulation of photoelectron flux, electron density, emission rate and limb intensity of CO(a3π) Cameron bands in the Martian thermosphere: Comparisons with (1) SPICAM and IUVS observations and (2) other model calculations
Haider, S. A.; Thirupathaiah, P.; Masoom, J.
Using analytical yield spectrum approach based on Monte Carlo method, the current study calculated the photoelectron flux, electron density, emission rate and limb intensity of carbon monoxide (CO)(a3π) bands between altitudes 90 and 200 km. The observation conditions that prevailed when the spectroscopy for investigation of the charact…