Results 101 to 110 of about 3,207 (171)

Collisions of Main-Sequence Stars and the Formation of Blue Stragglers in Globular Clusters [PDF]

, 1996
James C. Lombardi, Frederic A. Rasio, Stuart L. Shapiro   +2 more
openalex   +1 more source

UBVI CCD Photometry of the Old Open Cluster NGC 1193

, 2008
We present UBVI photometry of the old open cluster NGC 1193. Color-magnitude diagrams (CMDs) of this cluster show a well defined main sequence and a sparse red giant branch.
Hiriart, David, Kim, Sang Chul, Kyeong, Jaemann, Sung, Eon-Chang   +3 more
core   +1 more source

HST — WFPC2 Photometry of the Globular Cluster NGC 288: Binary Systems, Blue Stragglers and Very Blue Stars [PDF]

, 2000
M. Bellazzini, M. Messineo
openalex   +1 more source

HIP 8522: A Puzzling Young Solar Twin with the Lowest Detected Lithium Abundance

The Astrophysical Journal
We present HIP 8522, a young solar twin with the lowest detected lithium abundance, potentially a field blue straggler or the result of episodic early accretion. Its stellar parameters ( T _eff  = 5729 ± 7 K, $\mathrm{log}\,g$  = 4.532 ± 0.016 dex, [Fe/H]
Jhon Yana Galarza, Diego Lorenzo-Oliveira, Thiago Ferreira, Henrique Reggiani, Aida Behmard, Joshua D. Simon, Eder Martioli, Ricardo López-Valdivia, Leandro de Almeida, Emiliano Jofré, Kareem El-Badry   +10 more
doaj   +1 more source

A Galactic Center Origin for HE 0437-5439, the Hypervelocity Star near the Large Magellanic Cloud

, 2010
We use Hubble Space Telescope imaging to measure the absolute proper motion of the hypervelocity star (HVS) HE 0437-5439, a short-lived B star located in the direction of the Large Magellanic Cloud (LMC).
Anderson, Jay, Bond, Howard E., Brown, Warren R., Geller, Margaret J., Gnedin, Oleg Y., Kenyon, Scott J., Livio, Mario   +6 more
core   +1 more source

Ultra–Lithium‐deficient Halo Stars and Blue Stragglers: A Common Origin? [PDF]

, 2001
Sean G. Ryan, Timothy C. Beers, Toshitaka Kajino, Katarina Rosolankova   +3 more
openalex   +1 more source

Evidence for Blue Straggler Stars Rejuvenating the Integrated Spectra of Globular Clusters [PDF]

, 2008
A. J. Cenarro, J. L. Cervantes, Michael A. Beasley, A. Marín-Franch, A. Vazdekis   +4 more
openalex   +3 more sources

The Blue Lurker WOCS 14020: A Long-period Post-common-envelope Binary in M67 Originating from a Merger in a Triple System

The Astrophysical Journal Letters
We present Hubble Space Telescope far-ultraviolet (FUV) spectra of a blue lurker–white dwarf (BL–WD) binary system in the 4 Gyr open cluster M67. We fit the FUV spectrum of the WD, determining it is a C/O WD with a mass of $0.7{2}_{-0.04}^{+0.05}$ M _ ...
Emily M. Leiner, Natalie M. Gosnell, Aaron M. Geller, Meng Sun, Robert D. Mathieu, Alison Sills   +5 more
doaj   +1 more source

Bright Variable Stars in NGC 6819 - An Open Cluster in the Kepler Field

, 2010
We describe a variability study of the moderately old open cluster NGC 6819. We have detected 4 new detached eclipsing binaries near the cluster turnoff (one of which may be in a triple system). Several of these systems should be able to provide mass and
Antonio Talamantes, Auner, Bragaglia, David D. Balam, Eric L. Sandquist, Ferraro, Geller, Hartman, Hole, James L. Clem, Kalirai, Matthew Shetrone, Milone, Pamyatnykh, Pigulski, Rosvick, Rucinski, Russell M. Robb, Samus, Sanders, Sandquist, Shetrone, Stello, VandenBerg, Williams   +24 more
core   +1 more source

Blue Straggler Stars: A Direct Comparison of Star Counts and Population Ratios in Six Galactic Globular Clusters [PDF]

, 2003
F. R. Ferraro, Alison Sills, Robert T. Rood, B. Paltrinieri, R. Buonanno   +4 more
openalex   +1 more source