Results 21 to 30 of about 531,438 (331)

Stellar Motions in the Polar Ring Galaxy NGC 4650A [PDF]

, 2003
We present the first measurement of the stellar kinematics in the polar ring of NGC 4650A. There is well defined rotation, with the stars and gas rotating in the same direction, and with similar amplitude.
Combes F., Rob A. Swaters, Vera C. Rubin
core   +1 more source

Gaia stellar kinematics in the head of the Orion A cloud: runaway stellar groups and gravitational infall [PDF]

Monthly notices of the Royal Astronomical Society, 2019
This work extends previous kinematic studies of young stars in the head of the Orion A cloud (OMC-1/2/3/4/5). It is based on large samples of infrared, optical, and X-ray selected pre-main-sequence stars with reliable radial velocities and Gaia-derived
K. Getman, E. Feigelson, M. Kuhn, G. P. G. P. S. University, C. I. O. Technology., Huntingdon Institute for X-ray Astronomy   +5 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

Spatially resolved kinematics of the central regions of M83: hidden mass signatures and the role of supernovae [PDF]

, 2012
The barred grand-design spiral M83 (NGC 5236) is one of the most studied galaxies given its proximity, orientation, and particular complexity. Nonetheless, many aspects of the central regions remain controversial conveying our limited understanding of ...
Colina, L., Davies, R., de Xivry, G. Orban, López, J. Piqueras   +3 more
core   +1 more source

Investigation of the Stellar Population of Several Polar Ring Galaxies

Galaxies, 2016
We present results of our investigation of two multi-spin galaxies which were taken from the catalog of polar ring galaxies. All of them possess nucleus-like knots.
Liliya Shalyapina, Gulnara Karataeva, Olga Merkulova, Valeriya Yakovleva, Nina Yablokova   +4 more
doaj   +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

TESS Hunt for Young and Maturing Exoplanets (THYME). IX. A 27 Myr Extended Population of Lower Centaurus Crux with a Transiting Two-planet System

The Astronomical Journal, 2023
We report the discovery and characterization of a nearby (∼85 pc), older (27 ± 3 Myr), distributed stellar population near Lower Centaurus Crux (LCC), initially identified by searching for stars comoving with a candidate transiting planet from TESS (HD ...
Mackenna L. Wood, Andrew W. Mann, Madyson G. Barber, Jonathan L. Bush, Adam L. Kraus, Benjamin M. Tofflemire, Andrew Vanderburg, Elisabeth R. Newton, Gregory A. Feiden, George Zhou, Luke G. Bouma, Samuel N. Quinn, David J. Armstrong, Ares Osborn, Vardan Adibekyan, Elisa Delgado Mena, Sergio G. Sousa, Jonathan Gagné, Matthew J. Fields, Reilly P. Milburn, Pa Chia Thao, Stephen P. Schmidt, Crystal L. Gnilka, Steve B. Howell, Nicholas M. Law, Carl Ziegler, César Briceño, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Joshua E. Schlieder, Hugh P. Osborn, Joseph D. Twicken, David R. Ciardi, Chelsea X. Huang   +37 more
doaj   +1 more source

Oort Constants and Local Stellar Kinematics from GCNS

Universe, 2023
Oort constants and local kinematics are vital parameters with which to study the structure and dynamics of the Milky Way. When GCNS was published, it provided a clean sample of stars in the solar vicinity, which gives us an ideal tool with which to ...
Sufen Guo, Zhaoxiang Qi
doaj   +1 more source

Orbit-Based Dynamical Models of the Sombrero Galaxy (NGC 4594) [PDF]

, 2011
We present axisymmetric, orbit-based models to study the central black hole, stellar mass-to-light ratio, and dark matter halo of NGC 4594 (M104, the Sombrero Galaxy).
Bendo, Binney, Bridges, Burkert, Cretton, Côté, Côté, David B. Fisher, Douglas Richstone, Dressler, Emsellem, Emsellem, Ferrarese, Gadotti, Gebhardt, Gebhardt, Gebhardt, Grillo, Gültekin, Gültekin, Häring, Jeffry Kinzler, John Kormendy, John R. Jardel, Juntai Shen, K. Gültekin, Karl Gebhardt, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Kormendy, Laor, Lauer, MacArthur, Magorrian, Marconi, Murphy, Pinkney, Rhode, Rix, Schlegel, Schulze, Shen, Silverman, Siopis, Sérsic, Thomas, Tod R. Lauer, Tonry, Tremaine, Valluri, van der Marel, Winge   +54 more
core   +2 more sources

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