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Related papers: A proper motion study of the Lupus clouds using VO…

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In this paper HIPPARCOS astrometric and kinematic data are used to calibrate both infrared luminosities and kinematical parameters of Long Period Variable stars (LPVs). Individual absolute K and IRAS 12 and 25 luminosities of 800 LPVs are…

Astrophysics · Physics 2009-11-06 M. O. Mennessier , N. Mowlavi , R. Alvarez , X. Luri

A number of studies based on data collected by the $\textit{Hubble Space Telescope}$ ($\textit{HST}$) GO-13297 program "HST Legacy Survey of Galactic Globular Clusters: Shedding UV Light on Their Populations and Formation" have investigated…

Context. The bright heads of penumbral filaments, penumbral grains (PGs), are manifestations of hot plasma flows rising to the surface. They are observed to move horizontally toward the sunspot umbra or away from it. Recent analyses of…

Solar and Stellar Astrophysics · Physics 2025-07-09 Michal Sobotka , Markus Schmassmann

Characterizing the physical properties and compositions of circumplanetary disks can provide important insights into the formation of giant planets and satellites. We report ALMA 0.88 mm (Band 7) continuum observations of six planetary-mass…

We study the kinematics of the Galactic thin and thick disk populations using stars from the RAVE survey's second data release together with distance estimates from Breddels et al. (2009). The velocity distribution exhibits the expected…

Astrophysics of Galaxies · Physics 2015-05-27 Yüksel Karatas , Rainer J. Klement

We present a series of 2-dimensional hydrodynamic simulations of massive disks around protostars. We simulate the same physical problem using both a `Piecewise Parabolic Method' (PPM) code and a `Smoothed Particle Hydrodynamic' (SPH) code,…

Astrophysics · Physics 2009-10-30 Andrew F. Nelson , Willy Benz , Fred C. Adams , David Arnett , ;

We analyze the velocity residuals of 551 carbon stars relative to a rotating-disk model of the inner $\sim 70 \rm deg^2$ of the Large Magellanic Cloud (LMC). We find that the great majority of the stars in this sample are best fit as being…

A fine structure related to the kinematic peculiarities of three components of the Scorpius-Centaurus association (LCC, UCL, and US) has been revealed in the UV-velocity distribution of Gould Belt stars. We have been able to identify the…

Astrophysics · Physics 2008-11-26 Vadim V. Bobylev , Anisa T. Bajkova

We present dynamical masses for 23 pre-main sequence K- and M-type stars in the Upper Scorpius star-forming region. These masses were derived from the Keplerian rotation of CO disk gas using the MCMC radiative-transfer package pdspy and a…

Astrophysics of Galaxies · Physics 2025-09-30 A. P. M. Towner , J. A. Eisner , P. D. Sheehan , L. A. Hillenbrand , Y. -L. Wu

The origin of very metal-poor (VMP; [Fe/H] $\leq -2.0$) stars on planar orbits has been the subject of great attention since their first discovery. However, prior to the release of the Gaia BP/RP (XP) spectra, and large photometric samples…

Astrophysics of Galaxies · Physics 2025-07-15 Shuai Xu , Haibo Yuan , Bowen Huang , Timothy C. Beers , Yang Huang , Maosheng Xiang , Kai Xiao , Jihye Hong , Young Sun Lee , Wuming Yang

The properties of stars and planets are shaped by the initial conditions of their natal clouds. However, the spatial scales over which the initial conditions can exert a significant influence are not well constrained. We report the first…

Solar and Stellar Astrophysics · Physics 2025-10-31 Caeley V. Pittman , Catherine C. Espaillat , Thanawuth Thanathibodee , Nuria Calvet , Lee W. Hartmann , Sylvie Cabrit

Transition disks are considered sites of ongoing planet formation, and their dust and gas distributions could be signposts of embedded planets. The transition disk around the T Tauri star RY Lup has an inner dust cavity and displays a…

Context. Galactic globular clusters are a very important tool in explaining the characteristics of the Milky Way. Therefore it is essential to determine the kinematical and dynamical properties of the new star cluster candidates, especially…

Understanding the large-scale dynamics of molecular clouds (MCs) is crucial for constraining the processes that govern star formation and the structure and evolution of the Galaxy. While gas tracers have traditionally been used to map MC…

We present kinematics of a sample of 107 DA white dwarfs from the SPY project and discuss kinematic criteria for a distinction of thin disk, thick disk, and halo populations. This is the first homogeneous sample of white dwarfs for which 3D…

Astrophysics · Physics 2009-11-07 E. -M. Pauli , R. Napiwotzki , M. Altmann , U. Heber , M. Odenkirchen , F. Kerber

The Kepler telescope has discovered over 4,000 planets (candidates) by searching ? 200,000 stars over a wide range of distance (order of kpc) in our Galaxy. Characterizing the kinematic properties (e.g., Galactic component membership and…

The frequency of multiple systems and their properties are key constraints of stellar formation and evolution. Formation mechanisms of very low-mass (VLM) objects are still under considerable debate and an accurate assessment of their…

Solar and Stellar Astrophysics · Physics 2017-02-01 M. C. Galvez-Ortiz , E. Solano , N. Lodieu , M. Aberasturi

The MUSE TIMER Survey has obtained high signal and high spatial resolution integral-field spectroscopy data of the inner $\sim6\times6$ kpc of 21 nearby massive disc galaxies. This allows studies of the stellar kinematics of the central…

Astrophysics of Galaxies · Physics 2020-05-20 Dimitri A. Gadotti , Adrian Bittner , Jesus Falcón-Barroso , Jairo Méndez-Abreu , the TIMER team

Scorpius-Centaurus is the nearest OB association and its hundreds of members were divided into sub-groups, including Lower Centaurus Crux. Here we study the dynamics of the Lower Centaurus Crux area stellar content. We report the revelation…

Solar and Stellar Astrophysics · Physics 2018-11-28 Bertrand Goldman , Siegfried Roeser , Elena Schilbach , Attila C. Moór , Thomas Henning

Transitional discs are a class of circumstellar discs around young stars with extensive clearing of dusty material within their inner regions on 10s of au scales. One of the primary candidates for this kind of clearing is the formation of…

Earth and Planetary Astrophysics · Physics 2016-10-26 M. Willson , S. Kraus , J. Kluska , J. D. Monnier , M. Ireland , A. Aarnio , M. L. Sitko , N. Calvet , C. Espaillat , D. J. Wilner