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pro vyhledávání: '"Abate C"'
We present new fluorine abundance estimations in two carbon enhanced metal-poor (CEMP) stars, HE 1429-0551 and HE 1305+0007. HE 1429-0551 is also enriched in slow neutron-capture process (s-process) elements, a CEMP-s, and HE 1305+0007 is enhanced in
Externí odkaz:
http://arxiv.org/abs/2008.10136
Publikováno v:
A&A 626, A68 (2019)
Wind mass transfer in binary systems with AGB donor stars plays a fundamental role in the formation of a variety of objects, including barium stars and CEMP stars. We carry out a comprehensive set of SPH simulations of wind-losing AGB stars in binari
Externí odkaz:
http://arxiv.org/abs/1903.04515
Autor:
Bonifacio, P., Caffau, E., Spite, M., Spite, F., Sbordone, L., Monaco, L., François, P., Plez, B., Molaro, P., Gallagher, A. J., Cayrel, R., Christlieb, N., Klessen, R. S., Koch, A., Ludwig, H. -G., Steffen, M., Zaggia, S., Abate, C.
Publikováno v:
A&A 612, A65 (2018)
Extremely metal-poor stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and to provide a chemical inventory that is as detailed as possible. S
Externí odkaz:
http://arxiv.org/abs/1801.03935
Publikováno v:
A&A 606, A137 (2017)
The chemically peculiar barium stars, CH stars, and most CEMP stars are all believed to be the products of mass transfer in binary systems from a now extinct AGB primary star. The mass of the AGB star and the orbital parameters of the system are the
Externí odkaz:
http://arxiv.org/abs/1707.08224
Autor:
Abate, C., Pols, O. R., Stancliffe, R. J., Izzard, R. G., Karakas, A. I., Beers, T. C., Lee, Y. S.
Publikováno v:
A&A 581, A62 (2015)
The stellar population in the Galactic halo is characterised by a large fraction of CEMP stars. Most CEMP stars are enriched in $s$-elements (CEMP-$s$ stars), and some of these are also enriched in $r$-elements (CEMP-$s/r$ stars). One formation scena
Externí odkaz:
http://arxiv.org/abs/1507.04969
Publikováno v:
A&A 581, A22 (2015)
Many observed CEMP stars are found in binary systems and show enhanced abundances of $s$-elements. The origin of the chemical abundances of these CEMP-$s$ stars is believed to be accretion in the past of enriched material from a primary star in the A
Externí odkaz:
http://arxiv.org/abs/1507.04662
Publikováno v:
A&A 576, A118 (2015)
AGB stars are responsible for producing a variety of elements, including carbon, nitrogen, and the heavy elements produced in the slow neutron-capture process ($s$-elements). There are many uncertainties involved in modelling the evolution and nucleo
Externí odkaz:
http://arxiv.org/abs/1502.07759
Carbon-enhanced metal-poor (CEMP) stars count for 9-25% of all the very metal-poor stars of the halo. In at least some CEMP stars the chemical enrichment is believed to be due to wind mass transfer in the past from an AGB donor star on to a low-mass
Externí odkaz:
http://arxiv.org/abs/1304.2570
Carbon-enhanced metal-poor stars (CEMP) are observed as a substantial fraction of the very metal-poor stars in the Galactic halo. Most CEMP stars are also enriched in s-process elements and these are often found in binary systems. This suggests that
Externí odkaz:
http://arxiv.org/abs/1302.4441
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