Results 1 to 10 of about 108,892 (343)
The “Building Blocks” of Stellar Halos [PDF]
Galaxies, 2017 The stellar halos of galaxies encode their accretion histories. In particular, the median metallicity of a halo is determined primarily by the mass of the most massive accreted object.
Kyle A. Oman +2 more
doaj +5 more sources
The Evolution of Stellar Populations [PDF]
Astrophysics and Space Science, 2001 We summarize the discussion section on ``Evolution of Stellar Populations'' we led on May 27, 2000 in Granada, Spain, as part of the Euroconference on The Evolution of Galaxies. I- Observational Clues.
Diaz, Angeles, Hardy, Eduardo
core +6 more sources
Stellar Populations in Normal Galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 I describe very briefly the new libraries of empirical spectra of stars covering wide ranges of values of the atmospheric parameters Teff, log g, [Fe/H], as well as spectral type, that have become available in the recent past, among them the HNGSL, MILES,
A, Gustavo Bruzual
core +5 more sources
A Multiwavelength Classification and Study of Red Supergiant Candidates in NGC 6946
The Astrophysical Journal, 2023 We have combined resolved stellar photometry from Hubble Space Telescope (HST), Spitzer, and Gaia to identify red supergiant (RSG) candidates in NGC 6946, based on their colors, proper motions, visual morphologies, and spectral energy distributions.
Jared R. Johnson +5 more
doaj +1 more source
Origins of the Evil Eye: M64's Stellar Halo Reveals the Recent Accretion of an SMC-mass Satellite
The Astrophysical Journal Letters, 2023 M64, often called the “Evil Eye” galaxy, is unique among local galaxies. Beyond its dramatic, dusty nucleus, it also hosts an outer gas disk that counter-rotates relative to its stars.
Adam Smercina +11 more
doaj +1 more source
Multiple Stellar Populations at Less Evolved Stages. III. A Possible Helium Spread in NGC 2210
The Astrophysical Journal, 2023 Helium variations are common features of globular clusters (GCs) with multiple stellar populations. All the formation scenarios predict that secondary population stars are enhanced in helium, but the exact helium content depends on the polluters ...
Chengyuan Li +8 more
doaj +1 more source
The Masses of Supernova Remnant Progenitors in M33
The Astrophysical Journal, 2023 Using resolved optical stellar photometry from the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region survey, we measured the star formation history near the position of 85 supernova remnants (SNRs) in M33.
Brad Koplitz +9 more
doaj +1 more source
RR Lyrae Variables as Tracers of the Galactic Bulge Kinematic Structure
Universe, 2022 RR Lyrae stars are recognized as some of the oldest stars in the Universe. In addition, they are some of the few old celestial objects for which distances can be reliably inferred.
Andrea M. Kunder
doaj +1 more source
Multiple Populations in Star Clusters
Universe, 2022 We review the multiple population (MP) phenomenon of globular clusters (GCs): i.e., the evidence that GCs typically host groups of stars with different elemental abundances and/or distinct sequences in photometric diagrams.
Antonino P. Milone, Anna F. Marino
doaj +1 more source
The Role of Bulge Formation in the Homogenization of Stellar Populations at $z\sim2$ as revealed by Internal Color Dispersion in CANDELS [PDF]
, 2015 We use data from the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey to study how the spatial variation in the stellar populations of galaxies relate to the formation of galaxies at $1.5 < z < 3.5$.
Boada, Steven +15 more
core +3 more sources