99 citations · 272 across the 12 of their papers we have counts for
14 papers
oMEGACat. X. Shedding light on the disrupted dwarf galaxy of Omega Centauri
Stefano Souza, Nadine Neumayer, Anil C. Seth +15
Omega Centauri (Cen) is the most massive and chemically complex star cluster in the Milky Way and is widely regarded as the surviving nuclear star cluster of an accreted dwarf…
oMEGACat. IX. Chemical Tagging of Omega Centauri Populations with Machine-Learning-Inferred Abundances from the MUSE Spectrograph
Z. Wang, A. C. Seth, C. Clontz +14
We present chemical abundance measurements for 7,302 red giant branch stars within the half-light radius (~5') of Centauri ( Cen), derived from MUSE spectra using the neural…
oMEGACat. VIII. A Subpopulation Census of ω Centauri
C. Clontz, A. C. Seth, Z. Wang +8
An understanding of the assembly history of the complex star cluster Omega Centauri has long been sought after, with many studies separating the stars on the color-magnitude diagra…
oMEGACat. VII. Tracing Interstellar and Intracluster Medium of Centauri using Sodium Absorptions
Z. Wang, A. C. Seth, M. Latour +14
We investigate the foreground interstellar medium along the line of sight and intracluster medium of Centauri ( Cen) by measuring the equivalent width of Na I D absorptions…
oMEGACat. VI. Analysis of the overall kinematics of Omega Centauri in 3D: velocity dispersion, kinematic distance, anisotropy, and energy equipartition
Maximilian Häberle, Nadine Neumayer, Callie Clontz +15
Omega Centauri ( Cen) is the Milky Way's most massive globular cluster and is likely the stripped nucleus of an accreted dwarf galaxy. In this paper, we analyze Cen's kinema…
oMEGACat V: Helium Enrichment in Centauri as a Function of Metallicity
C. Clontz, A. C. Seth, Z. Wang +12
Constraining the helium enhancement in stars is critical for understanding the formation mechanisms of multiple populations in star clusters. However, measuring helium variations f…
oMEGACat IV: Constraining Ages of Omega Centauri sub-giant branch stars with HST and MUSE
C. Clontz, A. C. Seth, A. Dotter +13
We present age estimates for over 8100 sub-giant branch (SGB) stars in Omega Centauri ( Cen) to study its star formation history. Our large data set, which combines multi-wavele…
oMEGACat III. Multi-band photometry and metallicities reveal spatially well-mixed populations within Centauri's half-light radius
M. S. Nitschai, N. Neumayer, M. Häberle +15
Centauri, the most massive globular cluster in the Milky Way, has long been suspected to be the stripped nucleus of a dwarf galaxy that fell into the Galaxy a long time ago. Th…
Fast-moving stars around an intermediate-mass black hole in Omega Centauri
Maximilian Häberle, Nadine Neumayer, Anil Seth +15
Black holes have been found over a wide range of masses, from stellar remnants with masses of 5-150 solar masses (Msun), to those found at the centers of galaxies with Msu…
oMEGACat II -- Photometry and proper motions for 1.4 million stars in Omega Centauri and its rotation in the plane of the sky
Maximilian Häberle, Nadine Neumayer, Andrea Bellini +15
Omega Centauri ( Cen) is the most massive globular cluster of the Milky Way. It is thought to be the nucleus of an accreted dwarf galaxy because of its high mass and its complex…
oMEGACat I: MUSE spectroscopy of 300,000 stars within the half-light radius of Centauri
M. S. Nitschai, N. Neumayer, C. Clontz +17
Omega Centauri ( 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 kine…
Dynamical model of the Milky Way using APOGEE and Gaia data
Maria Selina Nitschai, Anna-Christina Eilers, Nadine Neumayer +2
We construct a dynamical model of the Milky Way disk from a data set, which combines Gaia EDR3 and APOGEE data throughout Galactocentric radii between kpc. We m…
Three-dimensional analysis of the Minispiral at the Galactic Center: orbital parameters, periods and the mass of the black hole
Maria Selina Nitschai, Nadine Neumayer, Anja Feldmeier-Krause
In this paper we simultaneously fit the orbits and line-of-sight velocities of the ionized gas around the supermassive black hole, Sagittarius A (Sgr A), at the c…
First Gaia dynamical model of the Milky Way disc with six phase space coordinates: a test for galaxy dynamics
Maria Selina Nitschai, Michele Cappellari, Nadine Neumayer
We construct the first comprehensive dynamical model for the high-quality subset of stellar kinematics of the Milky Way disc, with full 6D phase-space coordinates, provided by the…