A5057477609- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- History and Developments in Astronomy
- Astronomical and nuclear sciences
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Planetary Science and Exploration
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Historical Studies on Spain
- Astronomical Observations and Instrumentation
- High-pressure geophysics and materials
- Geography and Environmental Studies in Latin America
- Space Exploration and Technology
- Atmospheric Ozone and Climate
- Cruise Tourism Development and Management
- Dark Matter and Cosmic Phenomena
- Ionosphere and magnetosphere dynamics
- Impact of Light on Environment and Health
- Economic Growth and Productivity
Universidade de Santiago de Compostela
2014-2023
Spanish National Observatory
2023
ABSTRACT The study of a selected set 69 double-lined spectroscopic binaries (SB2) with well-defined visual and orbits was carried out. orbital parallax, the mass, colour, luminosity each component were derived from observational data for almost all these systems. We have also obtained an independent estimation masses by comparing colour–magnitude diagram (CMD) to stellar evolution tracks reported Pietrinferni. Nearly points on CMD are located between two slightly different mass or which fall...
ABSTRACT The Traspena meteorite fell on 2021 January 18 about 20 km south-east of the city Lugo (Galiza, Spain), shortly after a huge and bright fireball crossed sky for 4.84 s. Astrometric measurements obtained from cameras Universidade de Santiago Compostela (USC) as well many casual videos were used to determine atmospheric trajectory this meteoroid which penetrated atmosphere generated sound waves that detected at three seismic stations. original had diameter 1.15 m mass around 2620 kg....
Abstract Binary stars are a very important source of astronomical information. Those short-period binaries observed by means both spectroscopy and interferometry can provide, through their corresponding orbits, precise values regarding individual masses as well orbital parallaxes. For this reason, it is fundamental to attempt optically resolve double-lined spectroscopic binaries. In the present article, we used elaboration specific algorithm in order determine necessary telescope aperture...
Aims.The main aim of this study is the elaboration a methodology for studying physical and dynamical properties multiple stars its application to hierarchical triple system Gl 22. A careful evaluation components' masses system's overall stability long-term evolution were also pursued.
The orbit of the visual–speckle binary A 2801 (HD 26441) was calculated independently previously published double-lined spectroscopic solution, obtaining similar values for common orbital elements. In this way, it has been possible to provide a consistent 3D and precise both parallax individual masses components, so physical properties stellar system are determined.
New data obtained during the 2018 March–April speckle run at 4.1 m Southern Astrophysical Research (SOAR) telescope located Cerro Pachón (Chile) allowed us to recalculate orbits of following visual binaries: WDS 06478+0020 (STT 157), 07003−2207 (FIN 334Aa,Ab), 07013−0906 (A 671), 10174−5354 (CVN 16Aa,Ab), 12155−3106 (RST 1658), 12572+0818 380), 13044−1316 (HU 642), 14243−3838 1785), 16094−3103 (I 557), 17115−1630 169), 17119−0151 (LPM 629), 17563 + 0259 2189), 18464−2755 2073), and...
ABSTRACT New data obtained with the 4.1 m Southern Astrophysical Research (SOAR) telescope at Cerro Pachón, Chile, allowed us to revise orbits and system masses of following southern visual double stars: WDS 01477-4358 (I 52), 01500-0408 (A 2602), 02514-2139 (DON 43), 03189-0101 (BU 1177), 04142-4608 (RST 2338), 06274-2544 (B 114), 18434-5546 398), 20002-5522 459 BC), 20081-3929 2134), 22007-5002 1450), 22504-1744 1038—BD-18 6201). In addition, orbit 15332-2429 Aa, Ab (CHR 232 Ab) was...
In the vast majority of cases when available astrometric measurements a visual binary cover very short orbital arc, it is practically impossible to calculate good quality orbit. It especially important for systems with pre-main-sequence components where standard mass−spectrum calibrations cannot be applied nor can dynamical parallax calculated. We have shown that analytical method Docobo allows us put certain constraints on most likely solutions, using an realistic estimate global mass...
We analyze the outburst experienced by September $\varepsilon$-Perseid meteor shower on 9 2013. As a result of our monitoring atmospheric trajectory 60 multi-station events observed over Spain was obtained and accurate orbital data were derived from them. On basis these orbits, we have tried to determine likely parent body this meteoroid stream employing dissimilarity criteria. In addition, emission spectra produced two belonging also recorded. The analysis has provided information about...
We report a comprehensive study of the binary system COU 2031, based on simultaneous and independent astrometric visual speckle observations radial-velocity measurements. The similarity two orbital solutions allows us to obtain not only consistent 3D orbit precise value parallax but also determine physical properties components.
Improved orbits are presented for the visual binaries WDS 02366+1227, 02434-6643, 03244-1539, 08507+1800, 09128-6055, 11532-1540, 17375+2419, and 22408-0333. The latest these were demonstrating a great inconsistency between systemic mass obtained through Kepler's Third Law that calculated as sum of their components’ standard mass–luminosity mass–spectrum relationships. Our improvement allowed us to obtain consistent masses 02434-6643 09128-6055 without need changing Hipparcos parallax. For...
Abstract By combining our improved visual orbit with the last spectroscopic solution of single-lined binary, MCA 74 (ADS 16672Aa, Ab; HD 219834A), we derived its orbital to have a period 6.321 years. Using Gaia parallax, systemic mass 1.87 ± 0.09 <?CDATA ${{ \mathcal M }}_{\odot }$?> and ratio q = 0.725 were obtained, which yielded individual masses 1.07 0.06 0.80 0.04 for main secondary components, respectively. The absolute magnitude +3.52 confirm that primary is late G5–G8 subgiant, while...
Recent speckle observations performed at the Discovery Channel Telescope, Gemini North and Special Astrophysical Observatory 6 m Telescope have permitted us to calculate visual orbit of SB2 HD 114882 for first time improve orbits two other systems, 30712 183255, using algorithms published by authors this research. Recently, new high-quality spectroscopic been obtained these binaries authors. We determine their 3D orbits, individual masses, orbital parallaxes, present them in paper. The...
Abstract The hierarchical three-body problem is one of the classical issues celestial mechanics, but recently it has regained importance due to its applications new scenarios, like compact objects and exoplanets. In this paper we realize a computational study using TIDES software package, which applied not only set theoretical cases also actual stellar systems. characteristics Taylor series integration method, used by TIDES, permit confirmation appearance Lidov–Kozai cycles in case high...
ABSTRACT New observational data obtained during the 2018, 2019, and 2020 speckle runs with 4.1-m Southern Astrophysical Research (SOAR) telescope located at Cerro Pachón (Chile) allowed us to recalculate orbits of visual binaries: WDS 00277-1625 (YR 1 Aa,Ab), 00462-2214 (RST4155), 03124-4425 (JC 8), 07427-3510 (HDS 1091), 10093+2020 (A2145), 10116+1321 (HU 874 AB), 10217-0946 (BU 25), 11585-2350 (RST 3767 13117-2633 (FIN 305), 13305+0729 (A 1789), 16458-0046 (A1141). In addition, we present...
The recent Gaia Data Release 3 has unveiled a catalog of over eight hundred thousand binary systems, providing orbital solutions for half them. Since most them are unresolved astrometric binaries, several astrophysical parameters that can be only derived from their relative orbits together with spectroscopic data, such as the individual stellar masses, remain unknown. Indeed, mass primary, $\texttt{m1}$, and wide interval, $\texttt{[m2_lower, m2_upper]}$, secondary companion main-sequence...
The recent Gaia Data Release 3 has revealed a catalogue of more than eight hundred thousand binary systems. release provides orbital solutions for half the systems, with majority them being unresolved astrometric binaries. However, some astrophysical parameters are still unknown most them, such as spectral type and mass each companion, since they can only be derived from relative orbit spectroscopic data. purpose this work is to develop methodology that would allow us obtain those...