Results 61 to 70 of about 11,734 (199)

The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars

The Astrophysical Journal
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply ...
Li Wang, Licai Deng, Xiaoying Pang, Long Wang, Richard de Grijs, Antonino P. Milone, Chengyuan Li   +6 more
doaj   +1 more source

Detection of a Spatially Extended Stellar Population in M33: A Shallow Stellar Halo?

The Astrophysical Journal
We analyze the outer regions of M33, beyond 15 kpc in projected distance from its center, using Subaru/Hyper Suprime-Cam multicolor imaging. We identify red giant branch (RGB) stars and red clump (RC) stars using the surface-gravity-sensitive NB515 ...
Itsuki Ogami, Yutaka Komiyama, Masashi Chiba, Mikito Tanaka, Puragra Guhathakurta, Evan N. Kirby, Rosemary F. G. Wyse, Carrie Filion, Takanobu Kirihara, Miho N. Ishigaki, Kohei Hayashi   +10 more
doaj   +1 more source

The Stellar Population of R136 [PDF]

Symposium - International Astronomical Union, 1999
The luminous, compact star cluster R136 in the Large Magellanic Cloud is 300 times more spatially concentrated than a typical OB association and contains at least 39 O3 stars, the most massive of which is ~150 M⊙. Yet, the stellar IMF for 2.8–120 M⊙ is normal. The massive stars are 1–2 Myrs old, and Wolf-Rayet stars are not evolved.
openaire   +1 more source

New Stellar Parameters, Metallicities, and Elemental Abundance Ratios for 311 Metal-poor Stars

The Astronomical Journal
We present equivalent widths, improved model atmosphere parameters, and revised abundances for 14 species of 11 elements derived from high-resolution optical spectroscopy of 311 metal-poor stars.
Sanil Mittal, Ian U. Roederer
doaj   +1 more source

Spectropolarimetry for Discerning Geometry and Structure in Circumstellar Media of Hot Massive Stars

Galaxies
Spectropolarimetric techniques are a mainstay of astrophysical inquiry, ranging from Solar System objects to the Cosmic Background Radiation. This review highlights applications of stellar polarimetry for massive hot stars, particularly in the context of
Richard Ignace, Kenneth G. Gayley, Roberto Casini, Paul Scowen, Christiana Erba, Jeremy Drake   +5 more
doaj   +1 more source

Preliminary Classification of the Forms of Galaxies According to Their Stellar Population. II [PDF]

, 1959
W. W. Morgan
openalex   +1 more source

Stellar Mass Segregation in Dark Matter Halos

The Astrophysical Journal
We study the effect of stellar mass segregation driven by collisional relaxation within the potential well of a smooth dark matter halo. This effect is of particular relevance for old stellar systems with short crossing times, where small collisional ...
Raphaël Errani, Jorge Peñarrubia, Matthew G. Walker   +2 more
doaj   +1 more source

The Hertzsprung-Russell diagrams of old stellar Populations [PDF]

, 1959
W. A. Baum
openalex   +1 more source

Probing Populations of Dark Stellar Remnants in the Globular Clusters 47 Tuc and Terzan 5 Using Pulsar Timing

The Astrophysical Journal
We present a new method to combine multimass equilibrium dynamical models and pulsar timing data to constrain the mass distribution and remnant populations of Milky Way globular clusters (GCs).
Peter J. Smith, Vincent Hénault-Brunet, Nolan Dickson, Mark Gieles, Holger Baumgardt   +4 more
doaj   +1 more source

Stellar Groups in the Old Disk Population [PDF]

, 1969
O. J. Eggen
openalex   +1 more source