Results 21 to 30 of about 729 (198)

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., Israelian, G., Pont, F., Santos, N. C., Mayor, M.   +4 more
openaire   +2 more sources

Star cluster evolution, dynamical age estimation and the kinematical signature of star formation [PDF]

Monthly Notices of the Royal Astronomical Society, 1995
MNRAS (in press), 27 pages, plain TeX, includes Tables A-1, A-2 A-3, figures available on request. The estimate of the birth mass of the Pleiades cluster has been improved, and a few minor changes to the text have been ...
openaire   +2 more sources

The star formation history of Upper Scorpius and Ophiuchus

Astronomy & Astrophysics, 2022
Context. Understanding how star formation begins and propagates through molecular clouds is a fundamental but still open question. One major difficulty in addressing this question is the lack of precise 3D kinematics and age information for young stellar populations.
Miret-Roig, N., Galli, P. A. B., Olivares, J., Bouy, H., Alves, J., Barrado, D.   +5 more
openaire   +1 more source

THE MOSDEF SURVEY: DYNAMICAL AND BARYONIC MASSES AND KINEMATIC STRUCTURES OF STAR-FORMING GALAXIES AT 1.4 ≤ z ≤ 2.6 [PDF]

The Astrophysical Journal, 2016
ABSTRACT We present gas kinematics for 178 star-forming galaxies at from the MOSFIRE Deep Evolution Field survey.
Sedona H. Price, Mariska Kriek, Alice E. Shapley, Naveen A. Reddy, William R. Freeman, Alison L. Coil, Laura de Groot, Irene Shivaei, Brian Siana, Mojegan Azadi, Guillermo Barro, Bahram Mobasher, Ryan L. Sanders, Tom Zick   +13 more
openaire   +4 more sources

Galactic kinematics and dynamics from RAVE stars

, 2013
We analyse the kinematics of ~400000 RAVE stars. We split 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 non-clump giants. We fit Gaussian velocity ellipsoids to the meridional-plane components of velocity of each star class and give formulae from
Binney, J, Burnett, B, Kordopatis, G, Steinmetz, M, Gilmore, G, Bienayme, O, Bland-Hawthorn, J, Famaey, B, Grebel, E, Helmi, A, Navarro, J, Parker, Q, Reid, W, Seabroke, G, Watson, F, Williams, M, Wyse, R, Zwitter, T   +17 more
openaire   +3 more sources

Kinematics of Low‐zUltraluminous Infrared Galaxies and Implications for Dynamical Mass Derivations in High‐zStar‐forming Galaxies [PDF]

The Astrophysical Journal, 2005
The kinematic properties of the gaseous and stellar components of 11 ultraluminous infrared galaxies (ULIRGs; 14 nuclei) are investigated by means of integral field spectroscopy (IFS) with the INTEGRAL system and available IR and CO millimeter spectroscopy.
Colina, Luis, Arribas-Mocoroa, Santiago, Monreal-Ibero, Ana   +2 more
openaire   +2 more sources

Gas dynamics in the inner few AU around the Herbig B[e] star MWC297 [PDF]

Astronomy & Astrophysics, 2017
We present near-infrared AMBER (R = 12, 000) and CRIRES (R = 100, 000) observations of the Herbig B[e] star MWC297 in the hydrogen Br-gamma-line. Using the VLTI unit telescopes, we obtained a uv-coverage suitable for aperture synthesis imaging. We interpret our velocity-resolved images as well as the derived two-dimensional photocenter displacement ...
Edward Hone, Stefan Kraus, Alexander Kreplin, Karl-Heinz Hofmann, Gerd Weigelt, Tim Harries, Jacques Kluska   +6 more
openaire   +4 more sources

Adaptable Tile‐Based Pneumatic Origami through Structurally Coupled Localized Actuation

Advanced Engineering Materials, EarlyView.
This article presents tile‐based pneumatic origami structures with rigid tiles and flexible fabric creases, achieving adaptable properties including morphing shape, selective multistability, and tunable stiffness. Independently pressurized folding bladders at each crease enable structurally coupled localized actuation of origami structures.
Tiantian Li, Jonathan Luntz, Diann Brei
wiley   +1 more source

Compressible Flow Exfoliation of Two‐Dimensional Nanomaterials: Insights Into Layer Separation Informed by Gas Dynamics

Advanced Engineering Materials, EarlyView.
This study elucidates the mechanism of compressible flow exfoliation for producing 2D hexagonal boron nitride (h‐BN). Fluid dynamics analysis reveals that acceleration‐driven aerodynamic shear forces, rather than shock waves alone, drive effective layer separation.
Md Farhadul Islam, Saeed Arabha, Ray Hixon, Reza Rizvi   +3 more
wiley   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source