Results 51 to 60 of about 579,982 (342)

Exploring the Evolution of Stellar Rotation Using Galactic Kinematics [PDF]

Astronomical Journal, 2020
The rotational evolution of cool dwarfs is poorly constrained after ∼1–2 Gyr due to a lack of precise ages and rotation periods for old main-sequence stars.
R. Angus, A. Beane, A. Price-Whelan, E. Newton, J. Curtis, T. Berger, J. V. van Saders, Rocio Kiman, D. Foreman-Mackey, Y. Lu, L. Anderson, J. Faherty   +11 more
semanticscholar   +1 more source

Resolved SPLASH Chemodynamics in Andromeda’s PHAT Stellar Halo and Disk: On the Nature of the Inner Halo along the Major Axis

The Astronomical Journal, 2023
Stellar kinematics and metallicity are key to exploring formation scenarios for galactic disks and halos. In this work, we characterized the relationship between kinematics and photometric metallicity along the line of sight to M31's disk.
Ivanna Escala, Amanda C. N. Quirk, Puragra Guhathakurta, Karoline M. Gilbert, J. Leigh Wojno, Lara Cullinane, Benjamin F. Williams, Julianne Dalcanton   +7 more
doaj   +1 more source

Spectroscopic evidence of distinct stellar populations in the counter-rotating stellar disks of NGC 3593 and NGC 4550

, 2012
We present the results of integral-field spectroscopic observations of the two disk galaxies NGC 3593 and NGC 4550 obtained with VIMOS/VLT. Both galaxies are known to host 2 counter-rotating stellar disks, with the ionized gas co-rotating with one of ...
A. Pizzella, Afanasiev, Balcells, Beifiori, Bertola, Bertola, Bettoni, Bettoni, Bois, Bureau, Cappellari, Cappellari, Cappellari, Cappellari, Cervantes, Cid Fernandes, Coccato, Corsini, Crocker, E. Dalla Bontà, E. M. Corsini, Eliche-Moral, Emsellem, Evans, Freeman, García-Burillo, Gorgas, Graham, Guthrie, Haynes, Jedrzejewski, Jesseit, Johnston, Jore, Kannappan, Katkov, Kobulnicky, Krajnović, Kuijken, Kuijken, Kuntschner, L. Coccato, L. M. Buson, L. Morelli, Lagerholm, Liang, Lovelace, Maraston, Merrifield, Milone, Morelli, Pizzella, Pritchet, Puerari, Rix, Rubin, Rubin, Sarzi, Sommariva, Sánchez, Sánchez-Blázquez, Thakar, Thomas, Thomas, Thomas, Tutukov, Vazdekis, Vergani, Wiklind, Worthey, Worthey, Wozniak   +71 more
core   +1 more source

Metallicity-dependendent kinematics and morphology of the Milky Way bulge [PDF]

, 2016
We use N-body chemo-dynamic simulations to study the coupling between morphology, kinematics and metallicity of the bar/bulge region of our Galaxy. We make qualitative comparisons of our results with available observations and find very good agreement ...
Athanassoula, E., Prantzos, N., Rodionov, S. A.   +2 more
core   +5 more sources

Outflows and complex stellar kinematics in SDSS star forming galaxies [PDF]

, 2016
We investigate the properties of star formation-driven outflows by using a large spectroscopic sample of ~160,000 local "normal" star forming galaxies, drawn from the SDSS, spanning a wide range of star formation rates and stellar masses.
C. Cicone, R. Maiolino, A. Marconi
semanticscholar   +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

oMEGACat. I. MUSE Spectroscopy of 300,000 Stars within the Half-light Radius of ω Centauri

The Astrophysical Journal, 2023
Omega Centauri ( ω Cen) is the most massive globular cluster of the Milky Way and has been the focus of many studies that reveal the complexity of its stellar populations and kinematics.
M. S. Nitschai, N. Neumayer, C. Clontz, M. Häberle, A. C. Seth, T.-O. Husser, S. Kamann, M. Alfaro-Cuello, N. Kacharov, A. Bellini, A. Dotter, S. Dreizler, A. Feldmeier-Krause, M. Latour, M. Libralato, A. P. Milone, R. Pechetti, G. van de Ven, K. Voggel, Daniel R. Weisz   +19 more
doaj   +1 more source

The black hole in IC 1459 from HST observations of the ionized gas disk

, 2000
The peculiar elliptical galaxy IC 1459 (M_V = -21.19, D = 16.5 Mpc) has a fast counterrotating stellar core, stellar shells and ripples, a blue nuclear point source and strong radio core emission.
Binney J., C. Marcella Carollo, de Bruijne J. H. J., Drinkwater M. J., Genzel R., Gijs A. Verdoes Kleijn, Goudfrooij P., Goudfrooij P., Heckman T. M., Kormendy J., P. Tim de Zeeuw, Roeland P. van der Marel, Sadler E. M., Simpson C., Simpson C., Slee O. B., van der Marel R. P., van der Marel R. P., van der Marel R. P., Whittle M.   +19 more
core   +1 more source

The effects of bar-spiral coupling on stellar kinematics in the Galaxy [PDF]

, 2016
We investigate models of the Milky Way disc taking into account simultaneously the bar and a two-armed quasi-static spiral pattern. Away from major resonance overlaps, the mean stellar radial motions in the plane are essentially a linear superposition of
G. Monari, B. Famaey, A. Siebert, R. Grand, D. Kawata, C. Boily   +5 more
semanticscholar   +1 more source

Measurement of the Mass and Stellar Population Distribution in M82 with the LBT

, 2012
We present a K-band spectroscopic study of the stellar and gas kinematics, mass distribution, and stellar populations of the archetypical starburst galaxy M82.
Cottrell, Draine, Förster Schreiber, Förster Schreiber, Gerke, Goetz, Johnny P. Greco, Konstantopoulos, Mayall, Mayya, McCrady, McKeith, McKeith, Miwa, Noguchi, Oliva, Origlia, Paul Martini, Puxley, Saito, Sakai, Sanders, Sofue, Todd A. Thompson, Westmoquette   +24 more
core   +1 more source