Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Israelian, Garik"'
Autor:
Adibekyan, Vardan, Dorn, Caroline, Sousa, Sérgio G., Santos, Nuno C., Bitsch, Bertram, Israelian, Garik, Mordasini, Christoph, Barros, Susana C. C., Mena, Elisa Delgado, Demangeon, Olivier D. S., Faria, João P., Figueira, Pedro, Hakobyan, Artur A., Oshagh, Mahmoudreza, Soares, Barbara M. T. B., Kunitomo, Masanobu, Takeda, Yoichi, Jofré, Emiliano, Petrucci, Romina, Martioli, Eder
Publikováno v:
Science, vol 374, issue 6565, pp. 330-332 (2021)
Stars and planets both form by accreting material from a surrounding disk. Because they grow from the same material, theory predicts that there should be a relationship between their compositions. In this study, we search for a compositional link bet
Externí odkaz:
http://arxiv.org/abs/2102.12444
This chapter discusses the implications of X-ray binaries on our knowledge of Type Ibc and Type II supernovae. X-ray binaries contain accreting neutron stars and stellar--mass black holes which are the end points of massive star evolution. Studying t
Externí odkaz:
http://arxiv.org/abs/1701.07450
Publikováno v:
2012, A&A, 544A, 122S
We present a new direct spectroscopic calibration for a fast estimation of the stellar metallicity [Fe/H]. These calibrations were computed using a large sample of 451 solar-type stars for which we have precise spectroscopic parameters derived from h
Externí odkaz:
http://arxiv.org/abs/1209.0342
Autor:
Carter-Bond, Jade C., O'Brien, David P., Mena, Elisa Delgado, Israelian, Garik, Santos, Nuno C., Hernandez, Jonay I. Gonzalez
Simulations have shown that a diverse range of extrasolar terrestrial planet bulk compositions are likely to exist, based on the observed variations in host star elemental abundances. Based on recent studies, it is expected that a significant proport
Externí odkaz:
http://arxiv.org/abs/1201.1939
To understand the formation and evolution of solar-type stars and planets in the solar neighborhood, we need to obtain their stellar parameters with high precision. We present a catalog of precise stellar parameters for low-activity FGK single stars
Externí odkaz:
http://arxiv.org/abs/1108.5279
Autor:
Hernández, Jonay I. González, Casares, Jorge, Rebolo, Rafael, Israelian, Garik, Filippenko, Alexei V., Chornock, Ryan
We present a chemical abundance analysis of the secondary star in the black hole binary V404 Cygni, using Keck I/HIRES spectra. We adopt a $\chi^2$-minimization procedure to derive the stellar parameters, taking into account any possible veiling from
Externí odkaz:
http://arxiv.org/abs/1106.4278
Autor:
Mena, Elisa Delgado, Israelian, Garik, Hernández, Jonay I. González, Santos, Nuno C., Rebolo, Rafael
We present new UVES spectra of a sample of 14 mostly cool unevolved stars with planetary companions with the aim of studying possible differences in Be abundance with respect to stars without detected planets. We determine Be abundances for these sta
Externí odkaz:
http://arxiv.org/abs/1012.4281
Autor:
Sousa, Sérgio G., Santos, Nuno C., Israelian, Garik, Lovis, C., Mayor, Michel, Silva, Pedro B., Udry, Stephane
Publikováno v:
Astronomy and Astrophysics, 2011, Volume 526, id.A99
Stellar metallicity strongly correlates with the presence of planets and their properties. To check for new correlations between stars and the existence of an orbiting planet, we determine precise stellar parameters for a sample of metal-poor solar-t
Externí odkaz:
http://arxiv.org/abs/1012.1528
Autor:
Mena, Elisa Delgado, Israelian, Garik, González-Hernández, Jonay I., Bond, Jade C., Santos, Nuno C., Udry, Stephane, Mayor, Michel
Theoretical studies suggest that C/O and Mg/Si are the most important elemental ratios in determining the mineralogy of terrestrial planets. The C/O ratio controls the distribution of Si among carbide and oxide species, while Mg/Si gives information
Externí odkaz:
http://arxiv.org/abs/1009.5224
Autor:
Israelian, Garik, Mena, Elisa Delgado, Santos, Nuno, Sousa, Sergio, Mayor, Michel, Udry, Stephane, Cerdeña, Carolina Dominguez, Rebolo, Rafael, Randich, Sofia
The surface abundance of lithium on the Sun is 140 times less than protosolar, yet the temperature at the base of the surface convective zone is not hot enough to burn Li. A large range of Li abundances in solar type stars of the same age, mass and m
Externí odkaz:
http://arxiv.org/abs/0911.4198