Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Pols, Onno R."'
Publikováno v:
A&A 620, A63 (2018)
The chemical enrichments detected in CEMP-$s$ stars are believed to be the consequence of a mass-transfer episode from a now extinct AGB primary star. This hypothesis is borne out by the fact that most CEMP-$s$ stars exhibit RV variations suggesting
Externí odkaz:
http://arxiv.org/abs/1809.10157
Autor:
Mernier, François, de Plaa, Jelle, Pinto, Ciro, Kaastra, Jelle S., Kosec, Peter, Zhang, Yu-Ying, Mao, Junjie, Werner, Norbert, Pols, Onno R., Vink, Jacco
Publikováno v:
A&A 595, A126 (2016)
The hot intra-cluster medium (ICM) is rich in metals, which are synthesised by supernovae (SNe) and accumulate over time into the deep gravitational potential well of clusters of galaxies. Since most of the elements visible in X-rays are formed by ty
Externí odkaz:
http://arxiv.org/abs/1608.03888
CEMP-s stars are very metal-poor stars with enhanced abundances of carbon and s-process elements. They form a significant proportion of the very metal-poor stars in the Galactic halo and are mostly observed in binary systems. This suggests that the o
Externí odkaz:
http://arxiv.org/abs/1310.6859
In young dense clusters repeated collisions between massive stars may lead to the formation of a very massive star (above 100 Msun). In the past the study of the long-term evolution of merger remnants has mostly focussed on collisions between low-mas
Externí odkaz:
http://arxiv.org/abs/1307.2445
Autor:
Izzard, Robert G., de Mink, Selma E., Pols, Onno R., Langer, Norbert, Sana, Hugues, de Koter, Alex
Globular clusters contain many stars with surface abundance patterns indicating contributions from hydrogen burning products, as seen in the anti-correlated elemental abundances of e.g. sodium and oxygen, and magnesium and aluminium. Multiple generat
Externí odkaz:
http://arxiv.org/abs/1302.0725
Hierarchical triple systems are common among field stars yet their long-term evolution is poorly understood theoretically. In such systems Kozai cycles can be induced in the inner binary system during which the inner orbit eccentricity and the inclin
Externí odkaz:
http://arxiv.org/abs/1301.1469
Publikováno v:
A&A 547, A76, 2012
Most carbon-enhanced metal-poor (CEMP) stars are thought to result from past mass transfer of He-burning material from an asymptotic giant branch (AGB) star to a low-mass companion star, which we now observe as a CEMP star. Because AGB stars of inter
Externí odkaz:
http://arxiv.org/abs/1209.6082
Publikováno v:
AIPConf.Proc.948:79-83,2007
One possible scenario for the formation of carbon-enhanced metal-poor stars is the accretion of carbon-rich material from a binary companion which may no longer visible. It is generally assumed that the accreted material remains on the surface of the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702138
Publikováno v:
Mon.Not.Roy.Astron.Soc.363:293-314,2005
The old open cluster M67 is an ideal testbed for current cluster evolution models because of its dynamically evolved structure and rich stellar populations that show clear signs of interaction between stellar, binary and cluster evolution. Here we pr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0507239
Autor:
Hut, Piet, Shara, Michael M., Aarseth, Sverre J., Klessen, Ralf S., Lombardi Jr., James C., Makino, Junichiro, McMillan, Steve, Pols, Onno R., Teuben, Peter J., Webbink, Ronald F.
Publikováno v:
New Astron. 8 (2003) 337-370
We summarize the main results from MODEST-1, the first workshop on MOdeling DEnse STellar systems. Our goal is to go beyond traditional population synthesis models, by introducing dynamical interactions between single stars, binaries, and multiple sy
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207318