Results 31 to 40 of about 50,322 (326)

TDCOSMO

Astronomy & Astrophysics
Context. Constraining the mass-sheet degeneracy (MSD) is crucial for improving the precision and accuracy of time-delay cosmography. Joint analyses based on lensing and stellar kinematics have been widely adopted to break the MSD. A three-dimensional (3D)
Huang Xiang-Yu, Birrer Simon, Cappellari Michele, Treu Tommaso, Knabel Shawn, Sluse Dominique   +5 more
doaj   +1 more source

A Statistical Relation between Mass, Age, and Velocity Dispersion in the Solar Neighborhood

The Astrophysical Journal, 2023
The stellar kinematics of the Galactic disk are the main factors constraining disk formation and evolution processes in the Milky Way. In this paper, we investigate a statistical relation between stellar mass, age, and velocity dispersion for stars in ...
Hossein Fatheddin, Sedighe Sajadian
doaj   +1 more source

A Complex Stellar Line-of-Sight Velocity Distribution in the Lenticular Galaxy NGC 524

Open Astronomy, 2011
We present a detailed study of the stellar and gaseous kinematics in the luminous early-type galaxy NGC 524, derived from the long-slit spectroscopic observations obtained with the Russian 6 m telescope and the IFU data from the SAURON survey.
Katkov I., Chilingarian I., Sil’chenko O., Zasov A., Afanasiev V.   +4 more
doaj   +1 more source

Discovery of the Magellanic Stellar Stream Out to 100 kpc

The Astrophysical Journal, 2023
The Magellanic Stream (MS)—an enormous ribbon of gas spanning 140° of the southern sky trailing the Magellanic Clouds—has been exquisitely mapped in the five decades since its discovery.
Vedant Chandra, Rohan P. Naidu, Charlie Conroy, Ana Bonaca, Dennis Zaritsky, Phillip A. Cargile, Nelson Caldwell, Benjamin D. Johnson, Jiwon Jesse Han, Yuan-Sen Ting   +9 more
doaj   +1 more source

On the Origin of the Kinematical Differences Between the Stellar Halo and the Old Globular Cluster System in the Large Magellanic Cloud

, 2007
We discuss structural and kinematical properties of the stellar halo and the old globular cluster system (GCS) in the Large Magellanic Cloud (LMC) based on numerical simulations of the LMC formation.
Alves, Beasley, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bekki, Bertschinger, Borissova, Brodie, Chiba, Cioni, Cole, Elmegreen, Elmegreen, Fan, Freeman, Graff, Gratton, Grocholski, Hartwick, Irwin, Katz, Kenji Bekki, Kennicutt, Kinman, Kogut, Kunkel, Luks, McLaughlin, Meatheringham, Minniti, Mizutani, Olsen, Olsen, Olsen, Padmanabhan, Page, Santos, Schmidt, Schommer, Soszynski, Spergel, Staveley-Smith, Steinmetz, Subramaniam, Sugimoto, Susa, Van Den Bergh, Van Den Bergh, Van Der Marel, Van Der Marel, Yoshizawa, Young, Zinnecker   +58 more
core   +1 more source

On the origin of bursts in blue compact dwarf galaxies: clues from kinematics and stellar populations [PDF]

, 2014
Blue compact dwarf galaxies (BCDs) form stars at, for their sizes, extraordinarily high rates. In this paper, we study what triggers this starburst and what is the fate of the galaxy once its gas fuel is exhausted.
De Rijcke, S., Koleva, M., Schroyen, J., Verbeke, R., Vermeylen, L, Zeilinger, W. W.   +5 more
core   +2 more sources

A Gemini/GMOS Study of Intermediate Luminosity Early-Type Virgo Cluster Galaxies. I. Globular Cluster and Stellar Kinematics

, 2015
We present a kinematic analysis of the globular cluster systems and diffuse stellar light of four intermediate luminosity (sub-$L^{\ast}$) early-type galaxies in the Virgo cluster based on Gemini/GMOS data.
Blakeslee, John P., Côté, Patrick, Ferrarese, Laura, Jordán, Andrés, Li, Biao, Liu, Chengze, Mei, Simona, Peng, Eric W., Puzia, Thomas H., Takamiya, Marianne, Trancho, Gelys, West, Michael J., Zhang, Hong-xin   +12 more
core   +2 more sources

Maximum likelihood estimation of local stellar kinematics [PDF]

, 2012
Context. Kinematical data such as the mean velocities and velocity dispersions of stellar samples are useful tools to study galactic structure and evolution.
Aghajani, Toktam, Lindegren, Lennart
core   +1 more source

Kinematic signatures of triaxial stellar systems [PDF]

Symposium - International Astronomical Union, 1993
Analytic dynamic models of triaxial stellar systems, such as elliptical galaxies and galactic bulges, can be used to calculate the velocity fields of systems in a wide range of potentials without the need for orbit integrations. We present results from a first application of these models, in the form of velocity fields projected onto the sky.
Richard Arnold, Tim De Zeeuw, Chris Hunter   +2 more
openaire   +1 more source

Addressing Systematics in the Traceback Age of the β Pictoris Moving Group

The Astrophysical Journal, 2023
We characterize the impact of several sources of systematic errors on the computation of the traceback age of the β Pictoris moving group ( β PMG). We find that uncorrected gravitational redshift and convective blueshift bias absolute radial velocity ...
Dominic Couture, Jonathan Gagné, René Doyon   +2 more
doaj   +1 more source