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Visual Orbits of Spectroscopic Binaries with the CHARA Array. II. The Eclipsing Binary HD 185912
Gies, Douglas R.; Lester, Kathryn V.; Monnier, John D. +8 more
We present the visual orbit of the double-lined eclipsing binary, HD 185912, from long baseline interferometry with the CHARA Array. We also obtain echelle spectra from the Apache Point observatory to update the spectroscopic orbital solution and analyze new photometry from Burggraaff et al. to model the eclipses. By combining the spectroscopic an…
Implications of Philae Magnetometry Measurements at Comet 67P/Churyumov-Gerasimenko for the Nebular Field of the Outer Solar System
Auster, Hans-Ulrich; Heinisch, Philip; Glassmeier, Karl-Heinz +3 more
The remanent magnetization of solar system bodies reflects their accretion mechanism, the space environment in which they formed, and their subsequent geological evolution. In particular, it has been suggested that some primitive bodies may have formed large regions of coherent remanent magnetization as a consequence of their accretion in a backgr…
MARSWRF Prediction of Entry Descent Landing Profiles: Applications to Mars Exploration
Zorzano, María-Paz; Fonseca, Ricardo Morais; Martín-Torres, Javier
In this paper we use the Mars implementation of the Planet Weather Research and Forecasting model, MarsWRF, to simulate the Entry, Descent and Landing (EDL) vertical profiles from six past missions: Pathfinder, Mars Exploration Rovers Opportunity and Spirit, Phoenix, Mars Science Laboratory Curiosity rover, and ExoMars 2016 (Schiaparelli), and com…
Plasma Flows in the Cool Loop Systems
Wilhelm, Klaus; Rao, Yamini K.; Srivastava, Abhishek K. +2 more
We study the dynamics of low-lying cool loop systems for three data sets as observed by the Interface Region Imaging Spectrograph. Radiances, Doppler shifts, and line widths are investigated in and around observed cool loop systems using various spectral lines formed between the photosphere and transition region (TR). Footpoints of the loop thread…
Searching for Faint X-Ray Emission from Galactic Stellar Wind Bow Shocks
Binder, Breanna A.; Povich, Matthew S.; Behr, Patrick
We present a stacking analysis of 2.61 Ms of archival Chandra observations of stellar wind bow shocks. We place an upper limit on the X-ray luminosity of infrared-detected bow shocks of <2 × 1029 erg s-1, a more stringent constraint than has been found in previous archival studies and dedicated observing campaigns of nearb…
On the ion-neutral coupling in cometary comae
Eriksson, Anders I.; Vigren, Erik
In a cometary coma, the ion-neutral decoupling distance, sometimes referred to as the ion exobase or collisionopause, can be defined as the cometocentric distance, rin, where ions, initially moving with the neutral outgassing speed, have a probability of 1/e of not colliding with neutrals on their subsequent journey radially outwards. W…
Implication of kinetic Alfvén waves to magnetic field turbulence spectra: Earth's magnetosheath
Khodachenko, M. L.; Kumar, S.; Echim, M. +5 more
In the present paper, we investigate the power-law behaviour of the magnetic field spectra in the Earth's magnetosheath region using Cluster spacecraft data under solar minimum condition. The power spectral density of the magnetic field data and spectral slopes at various frequencies are analysed. Propagation angle,
The Independent Discovery of Planet Candidates around Low-mass Stars and Astrophysical False Positives from the First Two TESS Sectors
Cloutier, Ryan
Continuous data releases throughout the Transiting Exoplanet Survey Satellite (TESS) primary mission will provide unique opportunities for the exoplanet community at large to contribute to maximizing TESS's scientific return via the discovery and validation of transiting planets. This paper introduces our independent pipeline for the detection of …
All-sky angular power spectra from cleaned WISE×SuperCOSMOS galaxy number counts
Balaguera-Antolínez, A.; Costa-Duarte, M. V.; Xavier, H. S. +1 more
Aiming to extract cosmological information from linear scales of the WISE×SuperCOSMOS photometric redshift catalog, we perform a characterization of the systematic effects associated with stellar content, evidencing the presence of contamination and obscuration. We create an integrated model for these effects (which together we call "usurper conta…
A Search for Pulsed Very High-energy Gamma-Rays from 13 Young Pulsars in Archival VERITAS Data
Archer, A.; Benbow, W.; Bird, R. +58 more
We conduct a search for periodic emission in the very high-energy (VHE) gamma-ray band (E > 100 GeV) from a total of 13 pulsars in an archival VERITAS data set with a total exposure of over 450 hr. The set of pulsars includes many of the brightest young gamma-ray pulsars visible in the Northern Hemisphere. The data analysis resulted in nondetec…