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Cross-matching the General Catalogue of Variable Stars with the Gaia DR3 source catalogue
Eyer, L.; Kerschbaum, F.; Ansari, S. G.
The most recent release of the General Catalogue of Variable Stars (GCVS) (Samus et al. 2017) contains 518 different variable types, in eight different variable categories. The catalogue has now reached its 5th version available via the VizieR service and can be considered one of the primary catalogues on the subject. The Gaia Data Release 3 (DR3)…
Physical properties of the slow-rotating near-Earth asteroid (2059) Baboquivari from one apparition
Kim, Myung-Jin; Lee, Hee-Jae; Erece, Orhan +6 more
In this study, we carried out photometric, spectroscopic, and for the first time, polarimetric observations of the Amor-type near-Earth asteroid (2059) Baboquivari. Our findings represent the first reliable determination of Baboquivari's physical properties. We used data from a 1m-class telescope (T100) along with ALCDEF data for photometric analy…
Dating the Stars in the Calendrical Method Shoushili of the Yuan Dynasty
Ahn, Sang-Hyeon
Shoushili was the official calendrical method promulgated in 1280 CE by the Yuan dynasty. It contains a list of the angular spans in right ascensions for the 28 lunar lodges. They are known to have been measured by Guo Shoujing with his advanced instruments with an unprecedented precision or reading error of 5'. Such precise data are useful to det…
Constraints on star formation in Orion A from Gaia
Kounkel, Marina; Hartmann, Lee; Calvet, Nuria +4 more
We develop statistical methods within a Bayesian framework to infer the star formation history from photometric surveys of pre-main-sequence populations. Our procedures include correcting for biases due to extinction in magnitude-limited surveys, and using distributions from subsets of stars with individual extinction measurements. We also make mo…
Caracterización del sistema HD 196385 mediante imagen directa, velocidad radial y astrometría
García, L. H.; Petrucci, R.; Jofré, E. +1 more
In this paper we present a characterization of the relative orbit of HD 196385B combining data from direct imaging, radial velocity, and proper motions from the Hipparcos and Gaia missions. To perform a joint fit of the data, we used the code orvara. From the fit, we obtained ranges of possible values for the major semi-axis, the mass of the secon…
Spectroscopic follow-up of a subset of the Gaia/IPHAS catalogue of Hα-excess sources
Knigge, C.; Pala, A. F.; Monguió, M. +5 more
State-of-the-art techniques to identify Hα emission-line sources in narrow-band photometric surveys consist of searching for Hα excess with reference to nearby objects in the sky (position-based selection). However, while this approach usually yields very few spurious detections, it may fail to select intrinsically faint and/or rare Hα-excess sour…
Lack of influence of the environment in the earliest stages of massive galaxy formation
Barro, Guillermo; Pérez-González, Pablo G.; Costantin, Luca +5 more
We investigate how the environment affects the assembly history of massive galaxies. For that purpose, we make use of Survey for High-z Absorption Red and Dead Sources (SHARDS) and HST spectrophotometric data, whose depth, spectral resolution, and wavelength coverage allow to perform a detailed analysis of the stellar emission as well as obtaining…
Magmatic Origins of Extensional Structures in Tempe Terra, Mars
Thomas, M.; Orlov, C. J.; Bramham, E. K. +2 more
Numerous graben features transect the Tempe Terra plateau in the northeastern Tharsis Rise, Mars, making it one of the most heavily structured regions of Tharsis. The origin of the complex fault geometries, generated over three distinct stages of tectonic activity, is poorly understood. This work distinguishes between Tempe Terra structures of loc…
RCM modeling of bubble injections into the inner magnetosphere: geosynchronous orbit and the ionospheric responses
Wang, Chih-Ping; Yang, Jian; Mousavi, Ameneh +3 more
Introduction: Accurate characterization of the plasma sheet source population in the ring current region and its outer boundary at geosynchronous orbit is crucial for understanding the dynamics of the Earth's magnetosphere. The interaction between the ring current and plasma populations from the ionosphere is a focus of extensive research.Methods:…
First Detailed Photometric Investigation on the Nature of Contact Binary System AA Cet
Yıldırım, M. F.; Soydugan, F.
The TESS light curve (LC) of the marginal contact binary AA Cet was analyzed simultaneously with the radial velocity and the orbital period (OP) change of the system was investigated. The physical parameters of the system were obtained by analyzing the LC of AA Cet with the Wilson-Devinney method, and the absolute parameters of the components were…