Results 1 to 10 of about 1,298 (249)
Galactic kinematics and dynamics from Radial Velocity Experiment stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 We analyse the kinematics of ˜400 000 stars that lie within ˜2 kpc of the Sun and have spectra measured in the Radial Velocity Experiment. We decompose the sample into hot and cold dwarfs, red-clump and non-clump giants. The kinematics of the clump giants are consistent with being identical with those of the giants as a whole.
Matthias Steinmetz +2 more
exaly +9 more sources
Kinematics and dynamics of Gaia red clump stars [PDF]
Astronomy & Astrophysics, 2020 In this study, we analyse the kinematics and dynamics of a homogeneous sample of red clump stars, selected from the second Gaia data release catalogue in the direction of the Galactic poles, at five different positions in the plane. The level of completeness of the sample at heights between 0.6 and 3.5 kpc was asserted through a comparison with the 2 ...
Salomon, Jean-Baptiste +4 more
+6 more sources
The SAMI Galaxy Survey: Kinematics of Stars and Gas in Brightest Group Galaxies—The Role of Group Dynamics [PDF]
The Astrophysical Journal, 2021 Abstract We study the stellar and gas kinematics of the brightest group galaxies (BGGs) in dynamically relaxed and unrelaxed galaxy groups for a sample of 154 galaxies in the SAMI galaxy survey. We characterize the dynamical state of the groups using the luminosity gap between the two most luminous galaxies and the BGG offset from the ...
Mojtaba Raouf +19 more
openaire +2 more sources
Dynamical evolution of star-forming regions – II. Basic kinematics [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We follow the dynamical evolution of young star-forming regions with a wide range of initial conditions and examine how the radial velocity dispersion, $σ$, evolves over time. We compare this velocity dispersion to the theoretically expected value for the velocity dispersion if a region were in virial equilibrium, $σ_{\rm vir}$ and thus assess the ...
Parker, RJ, Wright, NJ
openaire +4 more sources
Kinematical fingerprints of star cluster early dynamical evolution [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2014 Abstract We study the effects of the external tidal field on the violent relaxation phase of star clusters dynamical evolution, with particular attention to the kinematical properties of the equilibrium configurations emerging at the end of this phase.
Vesperini, Enrico +3 more
openaire +2 more sources
Kinematics and Dynamics of Multiphase Outflows in Simulations of the Star-forming Galactic Interstellar Medium [PDF]
The Astrophysical Journal, 2020 Abstract Galactic outflows produced by stellar feedback are known to be multiphase in nature. Observations and simulations indicate that the material within several kiloparsecs of galactic disk midplanes consists of warm clouds embedded within a hot wind.
Aditi Vijayan +4 more
openaire +2 more sources
Kinematics of planet-host stars and their relation to dynamical streams in the solar neighbourhood [PDF]
Astronomy & Astrophysics, 2006 We present a detailed study on the kinematics of metal-rich stars with and without planets, and their relation with the Hyades, Sirius and Hercules dynamical streams in the solar neighbourhood. Accurate kinematics have been derived for all the stars belonging to the CORALIE planet search survey.
Ecuvillon, A. +4 more
openaire +2 more sources
Kinematics and Dynamics of OH/IR Stars [PDF]
Symposium - International Astronomical Union, 1993 The available kinematical data on OH/IR stars is discussed, and dynamical models for the OH/IR stars are presented.
openaire +1 more source
The kinematics of star clusters undergoing gas expulsion in Newtonian and Milgromian dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 15 pages, 7 figures, accepted for publication in ...
Xufen Wu, Pavel Kroupa
openaire +2 more sources
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT We employ a sample of 135 873 RR Lyrae stars (RRLs) with precise photometric-metallicity and distance estimates from the newly calibrated P–ϕ31–R21–[Fe/H] and Gaia G band P–R21–[Fe/H] absolute magnitude–metallicity relations of Li et al., combined with available proper motions from Gaia EDR3, and 6955 systemic radial velocities ...
Jonathan Cabrera Garcia +11 more
openaire +2 more sources