Search Publications
Lost in Space? Relativistic Interstellar Navigation using an Astrometric Star Catalog
Bailer-Jones, Coryn A. L.
The exploration of interstellar space will require autonomous navigation systems that do not rely on tracking from the Earth. Here I develop a method to determine the 3D position and 3D velocity of a spacecraft in deep space using a star catalog. As a spacecraft moves away from the Sun, the observed positions and velocities of the stars will chang…
Preliminary Statistical Analysis of Lambda Boötis Stars
Paunzen, E.; Hakobyan, A. A.; Alecian, G. +1 more
To enlarge our database of Chemically Peculiar stars, we compiled published data concerning the Lambda Boötis stars observed by high-resolution spectroscopy techniques during last decades. In total, 62 Lambda Boötis stars have been added to the database. To deepen our knowledge on statistical overview of the abundance anomalies versus the physical…
The late-type detached binary du Leonis
Nelson, Robert H.
New radial velocity and photometric data for DU Leonis have been obtained, and Roche-based simultaneous analysis of RV and light curve data for DU Leo has been accomplished for the first time, using the 2003 and 2015 versions of the Wilson-Devinney code. Values for the masses and radii have been obtained: M1 = 0.937 (5) Mʘ, M…
Horizon 2061: MoonVillage Perspectives for Science, Missions, Technologies, Infrastructures and Society
Foing, Bernard H.
We discuss MoonVillage Perspectives at Horizon 2061 addressing Science, Missions, Technologies, Infrastructures and Society. ESA, ILEWG and partners have been elaborating the concept of a Moon Village with the goal of a sustainable human presence and activity on the lunar surface as an ensemble where multiple users can carry out multiple activitie…
Study of DFBS Late-Type Stars at High Galactic Latitudes
Kostandyan, G. R.
We study in this thesis relatively bright late-type giants found in the First Byurakan Survey (FBS) data base. We present the 2nd version of the catalogue of FBS LTS with new data (FBS LTS v2), 1471 objects. It is a homogeneous and complete database for high- Galactic late-type stars, including M and C types. Since 2007, all FBS low-resolution spe…
Variability study of the FBS M giants
Gigoyan, K. S.; Kostandyan, G. R.
We study in this paper variability of the late-type M giants found in the First Byurakan Survey (FBS) spectroscopic data base. We used phase dependent light - curves from large sky area variability data bases such as Catalina Sky Survey (CSS) and All-Sky Automated Survey for Supernovae (ASAS-SN). We used also the distance information derived from …
Relation of internal attenuation, dust emission, and the size of spiral galaxies. Calibration at low-z and how to use it as a cosmological test at high-z
López-Corredoira, M.; Gutiérrez, C. M.
Aims: Dust in spiral galaxies produces emission in the far-infrared (FIR) and internal absorption in visible wavelengths. However, the relation of the two amounts is not trivial because optical absorption may saturate, but the FIR emission does not. Moreover, the volume concentration of dust plays a role in the relation of absorption and emis…
Relationship between magnetic field properties and statistical flow using numerical simulation and magnetic feature tracking on solar photosphere
Oba, T.; Iida, Y.; Hotta, H. +1 more
We perform radiative magnetohydrodynamic calculations for the solar-quiet region to investigate the dependence of statistical flow on magnetic properties and the three-dimensional structure of magnetic patches in the presence of large-scale flow that mimics differential rotation. It has been confirmed that strong magnetic field patches move faster…
Erratum: "Cassini Composite Infrared Spectrometer (CIRS) Observations of Titan 2004-2017" (2019, ApJS, 244, 14)
Bézard, Bruno; Vinatier, Sandrine; Lellouch, Emmanuel +16 more
Simulating re-impacts from craters at the deepest location of Phobos to generate its blue spectral units
Kikuchi, Hiroshi
The spatial distribution pattern of ejecta from an impact crater on the surface of a body in space holds clues to understanding the ejecta launch conditions, the crater excavation process, and the dynamical environment. In particular, focusing on re-impact sites from larger or deeper craters on the surface is important, as they tend to preserve mu…