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L1 Stream Deflection and Ballistic Launching at the Disk Bow Shock: An Absorption-line Velocity Analysis in Semi-detached Binaries
Godon, Patrick
Observations of semi-detached interacting binaries reveal orbital modulation in the optical, UV, and X-ray bands, indicating the presence of absorbing material obscuring the disk and accreting primary star at specific orbital phases consistent with L1 stream material overflowing the disk edge. We simulate the L1 stream interaction with the disk us…
The M3 project: 1- A global hyperspectral image-cube of the Martian surface
Bibring, J. -P.; Gondet, B.; Poulet, F. +3 more
This paper is the first paper of a series that will present the derivation of the modal mineralogy of Mars (M3 project) at a global scale from the near-infrared dataset acquired by the imaging spectrometer OMEGA (Observatoire pour la Minéralogie, l'Eau, les Glaces et l'Activité) on board ESA/Mars Express. The objective is to create and …
Swift UVOT observations of the 2015 outburst of V404 Cygni
Altamirano, D.; Knigge, C.; Page, M. J. +10 more
The black hole binary, V404 Cygni, went into outburst in 2015 June, after 26 years of X-ray quiescence. We observed the outburst with the Neil Gehrels Swift observatory. We present optical/UV observations taken with the Swift Ultra-violet Optical Telescope, and compare them with the X-ray observations obtained with the Swift X-ray Telescope. We fi…
Seismic signal from waves on Titan's seas
Lorenz, Ralph D.; Stähler, Simon C.; Panning, Mark P. +4 more
Seismology is the main tool for inferring the deep interior structures of Earth and potentially also of other planetary bodies in the solar system. Terrestrial seismology is influenced by the presence of the ocean-generated microseismic signal, which sets a lower limit on the earthquake detection capabilities but also provides a strong energy sour…
A catalog of DB white dwarfs from the LAMOST DR5 and construction of templates
Luo, A. -Li; Kong, Xiao; Li, Xiang-Ru
In this study, we employ machine learning to build a catalog of DB white dwarfs (DBWDs) from the LAMOST Data Release (DR) 5. Using known DBs from SDSS DR14, we selected samples of high-quality DB spectra from the LAMOST database and applied them to train the machine learning process. Following the recognition procedure, we chose 351 DB spectra of …
The upper atmosphere of Venus: Model predictions for mass spectrometry measurements
Wurz, P.; Galli, A.; Vorburger, A. +1 more
Venus is the closest and most similar planet to Earth in the whole solar system, yet, basic measurements are missing. The atmospheric composition has been studied to some extent with the Pioneer Venus Orbiter mission and the more recent Venus Express, however, the concentration of many species and their isotopic ratios are not yet known with satis…
Astrometry and Occultation Predictions to Trans-Neptunian and Centaur Objects Observed within the Dark Energy Survey
Smith, M.; Abbott, T. M. C.; Abdalla, F. B. +60 more
Trans-Neptunian objects (TNOs) are a source of invaluable information to access the history and evolution of the outer solar system. However, observing these faint objects is a difficult task. As a consequence, important properties such as size and albedo are known for only a small fraction of them. Now, with the results from deep sky surveys and …
Early-type galaxies in low-density environments: NGC 6876 explored through its globular cluster system
Bassino, Lilia P.; Caso, Juan P.; Ennis, Ana I. +1 more
We present the results of a photometric study of the early-type galaxy NGC 6876 and the surrounding globular cluster (GC) system. The host galaxy is a massive elliptical, the brightest of this type in the Pavo Group. According to its intrinsic brightness (Mv ∼ -22.7), it is expected to belong to a galaxy cluster instead of a poor group.…
Proper Motions and Shock Wave Dynamics in the HH 7-11 Stellar Jet
Hartigan, P.; Frank, A.; Holcomb, R.
We have used the Hubble Space Telescope (HST) to acquire new broadband and narrowband images of the optical line emission and red continuum associated with the HH 7-11 stellar jet in the NGC 1333 star formation region. Combining the new narrowband images of Hα, [O I] λ6300, and [S II] λ6716 allows us to measure electron densities and excitations a…
Upper limits on the water vapour content of the β Pictoris debris disk
Olofsson, G.; Liseau, R.; Larsson, B. +3 more
Context. The debris disk surrounding β Pictoris has been observed with ALMA to contain a belt of CO gas with a distinct peak at 85 au. This CO clump is thought to be the result of a region of enhanced density of solids that collide and release CO through vaporisation. The parent bodies are thought to be comparable to solar system comets, in which …