Results 61 to 70 of about 4,407 (194)

The Evolution of Blue Stragglers Formed Via Stellar Collisions [PDF]

, 1998
We have used the results of recent smoothed particle hydrodynamic simulations of colliding stars to create models appropriate for input into a stellar evolution code.
C. J. Pritchet, Cameron A. C., Hills J. G., J. A. Ouellette, Lauzeral C., Mathys G., Mestel L., Podsiadlowski P., Tassoul M., Tout C. A., Vogt H.   +10 more
core   +3 more sources

Blue Straggler Stars: Early Observations that Failed to Solve the Problem

, 2014
In this chapter, I describe early ideas on blue stragglers, and various observations (some published, some not) that promised but failed to resolve the question of their origin.
A. Miglio, A. R. Sandage, A. R. Sandage, A. R. Sandage, A. Sarajedini, B. Margon, B. Niss, C. A. Murray, C. D. Bailyn, D. C. Morton, D. Pooley, E. M. Burbidge, F. Fusi Pecci, F. Hoyle, F. Paresce, F. R. Ferraro, G. Meynet, G. W. Preston, H. C. Arp, H. C. Arp, H. C. Arp, H. E. Bond, H. E. Bond, H. L. Johnson, H. Spinrad, I. Iben, J. A. Ahumada, J. A. Crawford, J. C. Wheeler, J. Smak, K. A. Montgomery, K. C. Freeman, K. M. Cudworth, L. L. Stryker, M. Livio, N. G. Roman, O. J. Eggen, O. J. Eggen, O. J. Eggen, O. J. Eggen, P. Guhathakurta, P. Hut, P. J. T. Leonard, P. Pesch, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. D. Cannon, R. N. Manchester, R. P. Kraft, R.E. Cohen, T. A. Smecker-Hane, T. D. Kinman, V. Trimble, V. Trimble, W Hiltner, W. H. McCrea, W.L. W. Sargent, Y. Xin, Z. Kopal   +59 more
core   +1 more source

Comprehensive Analysis of NGC 6134: Structure, Dynamics, and Blue Straggler Star Candidates

The Astrophysical Journal Supplement Series
Open clusters play a critical role in the study of both stellar and Galactic evolution. We present a comprehensive analysis of the open cluster NGC 6134 using Gaia DR3 astrometric and photometric data, supplemented with multiwavelength observations from ...
Dexin Zeng, Ying Mei, Huanbin Chi, Hui Deng, Feng Wang   +4 more
doaj   +1 more source

Introduction to the Theory of Stellar Evolution

, 2014
In this chapter we briefly review the basics of the theory of stellar evolution.Comment: Chapter 1, in Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
Beccari, G., Carraro, G.
core   +1 more source

The lithium abundance of M67 blue stragglers - A constraint on the blue straggler phenomenon

The Astrophysical Journal, 1991
Upper limits have been placed on the line strength of the 6707 A Li I resonance doublet in seven blue stragglers in M67. The corresponding upper limits on abundances range from log N(Li) less than about 1.3 to less than about 2.3. This result is significantly below the level of log N(Li) about 3.1 + or {minus} 0.1 found in field main-sequence stars of ...
C. J. Pritchet, J. W. Glaspey
openaire   +1 more source

UOCS XIV: Study of the Open Cluster NGC 2627 Using UVIT/AstroSat

The Astronomical Journal
We study the intermediate-age open cluster NGC 2627, located at a distance of ∼2 kpc, using UVIT/AstroSat and other archival data. Using a machine learning-based algorithm, ML-MOC, on the Gaia DR3 data, we identify 422 cluster members, including four ...
Pinapati Saketh, Anju Panthi, Kaushar Vaidya   +2 more
doaj   +1 more source

A rotation-based census of blue lurker candidates in open clusters

Astronomy & Astrophysics
Aims. We have compiled a list of blue lurker (BL) candidates in open clusters using the available rotation catalogs. Blue lurkers are rejuvenated main-sequence stars hidden among normal main-sequence stars on color-magnitude diagrams of star clusters. In
Jadhav Vikrant V., Rao Khushboo K., Reggiani Elisabetta   +2 more
doaj   +1 more source

Characterization of Blue and Yellow Straggler Stars of Berkeley 39

The Astronomical Journal
We characterize blue straggler stars (BSSs) and yellow straggler stars (YSSs) of the open cluster (OC) Berkeley 39 using multiwavelength observations including the Swift/Ultraviolet and Optical Telescope (UVOT). Our analysis also makes use of ultraviolet
Komal Chand, Khushboo K. Rao, Kaushar Vaidya, Anju Panthi   +3 more
doaj   +1 more source

Young blue straggler stars in the Galactic field [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
In this study we present an analysis of a sample of field blue straggler (BS) stars that show high ultra violet emission in their spectral energy distributions (SED): indication of a hot white dwarf (WD) companion to BS. Using photometry available in the Sloan Digital Sky Survey (SDSS) and Galaxy Evolution Explorer (GALEX ) surveys we identified 80 ...
Ekanayake, Gemunu, Wilhelm, Ronald
openaire   +2 more sources

Contribution of primordial binary evolution to the two blue-straggler sequences in globular cluster M30

, 2017
Two blue-straggler sequences discovered in globular cluster M30 provide a strong constraint on the formation mechanisms of blue stragglers. We study the formation of the blue-straggler binaries through binary evolution, and find that binary evolution can
Chen, Xuefei, Han, Zhanwen, Jiang, Dengkai, Li, Lifang   +3 more
core   +1 more source