Results 1 to 10 of about 4,407 (194)

Spectroscopic and asteroseismic analysis of the remarkable main-sequence A star KIC 11145123 [PDF]

, 2017
A spectroscopic analysis was carried out to clarify the properties of KIC 11145123 -- the first main-sequence star with a determination of core-to-surface rotation -- based on spectra observed with the High Dispersion Spectrograph (HDS) of the Subaru ...
Kurtz, Donald W., Murphy, Simon J., Saio, Hideyuki, Sekii, Takashi, Shibahashi, Hiromoto, Takada-Hidai, Masahide, Takata, Masao   +6 more
core   +2 more sources

Blue Stragglers from Primordial Binary Evolution [PDF]

Proceedings of the International Astronomical Union, 2008
AbstractBinaries exist in all clusters and much evidence suggests that close-binary evolution makes an important contribution to the blue straggler population, at least in some clusters as well as in the field. Here we present different channels to blue stragglers from primordial binary evolution and examine their contributions to the integrated ...
Xuefei Chen, Zhanwen Han
openaire   +1 more source

Transitory Tidal Heating and Its Impact on Cluster Isochrones

The Astrophysical Journal
The kinetic energy in tidal flows, when converted into heat, can affect the internal structure of a star and shift its location on a color–magnitude diagram from that of standard models.
S. Jane Arthur, Gloria Koenigsberger, Kristin Brady, Diana Estrella-Trujillo, Catherine Pilachowski   +4 more
doaj   +1 more source

Multiple stellar populations and their influence on blue stragglers

, 2010
It has become clear in recent years that globular clusters are not simple stellar populations, but may host chemically distinct sub-populations, typically with an enhanced helium abundance. These helium-rich populations can make up a substantial fraction
Alexander, Alison Sills, Anders, Angulo, Bedin, Buchler, Böhm-Vitense, Campbell, Cassisi, Chen, Chen, Chen, D'Antona, D'Ercole, De Mink, Dearborn, Decressin, Eggleton, Eggleton, Eldridge, Evert Glebbeek, Ferraro, Ferraro, Ferraro, Formicola, Fujimoto, Fusi Pecci, Glebbeek, Glebbeek, Gratton, Han, Harris, Herwig, Härm, Iben, Iglesias, Kippenhahn, Kippenhahn, Knigge, Kroupa, Leigh, Leigh, Lejeune, Lejeune, Lombardi, Lombardi, Milone, Mocák, Nathan Leigh, Pancino, Piotto, Piotto, Piotto, Pols, Pols, Portegies Zwart, Refsdal, Renzini, Sandage, Saviane, Schlegel, Schröder, Schröder, Sills, Sills, Sills, Sills, Stancliffe, Stancliffe, Ventura, Ventura, Ventura, Ventura, Walker   +73 more
core   +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

Chemical composition of a palomar 12 blue straggler

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT With the equivalent area of a 16-m telescope, ESPRESSO in 4UT mode allows to inaugurate high resolution spectroscopy for solar-type stars belonging to extragalactic globular clusters. We determine the chemical composition of an extragalactic blue straggler (BS).
L Pasquini, P Bonifacio, L Pulone, A Modigliani, E Brocato, L Sbordone, S Randich, G Cupani   +7 more
openaire   +4 more sources

The First Detection of Blue Straggler Stars in the Milky Way Bulge

, 2011
We report the first detections of Blue Straggler Stars (BSS) in the bulge of the Milky Way galaxy. Proper motions from extensive space-based observations along a single sight-line allow us to separate a sufficiently clean and well-characterized bulge ...
Albrow, Alvio Renzini, Andronov, Aparicio, Brown, Brown, Bureau, Carney, Carrera, Clarkson, Combes, Dante Minniti, Davies, Ferraro, Freeman, Gilliland, Howard E. Bond, Jay Anderson, Kailash C. Sahu, Kroupa, Kuijken, Lanzoni, Latham, Livio, Manuela Zoccali, Mario Livio, Mateo, Mateo, McCrea, McWilliam, McWilliam, Nataf, Nataf, Perets, Piotto, Preston, R. Michael Rich, T. Ed. Smith, Thomas M. Brown, van der Marel, W. I. Clarkson   +40 more
core   +1 more source

Evolution of Mass Functions of Coeval Stars through Wind Mass Loss and Binary Interactions [PDF]

, 2015
Accurate determinations of stellar mass functions and ages of stellar populations are crucial to much of astrophysics. We analyse the evolution of stellar mass functions of coeval main sequence stars including all relevant aspects of single- and binary ...
de Mink, S. E., Izzard, R. G., Langer, N., Schneider, F. R. N.   +3 more
core   +2 more sources

Blue straggler stars

This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor F.R.N.
Wang, Chen, Ryu, Taeho
openaire   +2 more sources

Blue Stragglers: Spectra of Globular Clusters [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractThe integrated Balmer lines of unresolved stellar systems have been widely used as age indicators, since they are sensitive to the temperature of the main sequence turn-off. However, the existence of “non-canonical” stellar stages such as hot horizontal branch stars and blue straggler stars (BSSs) can lead to underestimations of the true ...
A. J. Cenarro, J. L. Cervantes, M. A. Beasley, A. Marin-Franch, A. Vazdekis   +4 more
openaire   +1 more source