Search Publications
Martian CO profiles from the solar occultation experiment of NOMAD on board TGO
Aoki, S.; Vandaele, A. C.; Daerden, F. +18 more
Carbon monoxide is one of the important minor species in the Martian atmosphere due to its role in the photochemical stability of the \ce{CO2} atmosphere and can also be used as a dynamical tracer. The SO spectrometer onboard the Trace Gas Orbiter (TGO) scans the Martian limb in the infrared provides transmittances with fine vertical sampling ($\s…
Revisiting the old end of the Milky Way open cluster age function
Piatti, Andrés E.
Age distribution of the open cluster system is a key piece of information to decipher the star-formation history of the milky way disk. Recently, a remarkable earlier drop of its older end was found, which caught our attention. Precisely, we analysed in detail the population of open clusters older than 1 Gyr located inside a circle of 2.0 kpc from…
Sparse Logistic Regression for RR Lyrae versus Binaries Classification
Bono, Giuseppe; Pasquato, Mario; Braga, Vittorio F. +4 more
RR Lyrae (RRL) stars are old, low-mass, radially pulsating variable stars in their core helium burning phase. They are popular stellar tracers and primary distance indicators since they obey well-defined period-luminosity relations in the near-infrared regime. Their photometric identification is not trivial; indeed, RRL star samples can be contami…
An Improved Pair Method to Probe the Dust Extinction Law
Gao, Jian; Ren, Yi; Wang, Yuxi +1 more
Dust extinction law is crucial to recover the intrinsic energy distribution of celestial objects and infer the characteristics of interstellar dust. Based on the traditional pair method, an improved pair method is proposed to model the dust extinguished spectral energy distribution (SED) of an individual star. Instead of the mathematically paramet…
Titan's North-South Haze Asymmetry Ratio and Boundary at Visible Wavelengths over the Cassini Mission
Barnes, Jason W.; Lorenz, Ralph D.; Vashist, Aadvik S. +2 more
We document the evolution of the north-south asymmetry (NSA) of Titan's haze albedo during the Cassini mission between 2004 and 2017. We analyze coadded cube images taken at 96 distinct wavelengths between 0.35 and 1.05 µm by the Cassini Visual and Infrared Mapping Spectrometer (VIMS-V) instrument from 14 Titan flybys. Over half of a Titan y…
The Interstellar Ti II Distance Scale
Krełowski, J.; Galazutdinov, G. A.; Santander, T. A. +1 more
We measured the equivalent widths (
Kepler, K2, and TESS observations: ensemble and comparative asteroseismology
Reed, M. D.; Jeffery, C. S.; Baran, A. S. +2 more
The original Kepler mission detected 18 pulsating subdwarf B (sdBV) stars, K2 observed 161 of our proposed targets with 41 sdB stars found to show p- or g-mode pulsations, and TESS has observed about 1,000 of our proposed targets. All these data should provide ∼300 sdBV stars, from which asteroseismology will provide a host of measurables. Combine…
TYC 1417-891-1 and TYC 1478-742-1: Eclipsing variable stars. The Gaia EDR3 and TESS photometric data.
Gigoyan, K. K.; Gigoyan, K. S.; Kostandyan, G. R.
Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two G - type dwarfs: TYC 1417-891-1 and TYC 1478-742-1. Both objects show EA (Algol - type) light curves morphology. Orbital period for TYC 1417-891-1 is P ≈ 8.0 day and for TYC 1478-742-1, P ≈ 13.6 day. We p…
The Structure of the Warped Io Plasma Torus Constrained by the Io Footprint
Saur, Joachim; Schlegel, Stephan
Standard models of force balance along Jovian field lines predict the location of the Io Plasma Torus to be the centrifugal equator of Jupiter's magnetosphere, that is, the position along the magnetic field lines farthest away from Jupiter's rotational axis. In many models, the centrifugal equator is assumed to lay on a plane, calculated from a (s…
Confirmation and characterization of neglected WDS systems using Gaia data release 3 and the virtual observatory
Cortés-Contreras, M.; Solano, E.; Rodrigo, C. +2 more
The aim of this article is making use of the Gaia DR3 catalogue and virtual observatory tools, to confirm and characterize 428 binary and multiple stellar systems classified as neglected (only one observation) in the Washington Double Star Catalogue (WDS). The components of the stellar systems have the same parallax and proper motion (within the e…