Tucci Maia, M.
Total Authors: 5
 Lab Nacl Astrofis, Rua Estados Unidos 154, BR-37504364 Itajuba, MG - Brazil
 Univ Diego Portales, Fac Ingn, Nucleo Astron, Ave Ejercito 441, Santiago - Chile
 Univ Sao Paulo, Dept Astron IAG USP, Sao Paulo, SP - Brazil
Total Affiliations: 3
Astronomy & Astrophysics;
AUG 20 2019.
Web of Science Citations:
The binary system 16 Cygni is key in studies of the planet-star chemical composition connection, as only one of the stars is known to host a planet. This allows us to better assess the possible influence of planet interactions on the chemical composition of stars that are born from the same cloud and thus should have a similar abundance pattern. In our previous work, we found clear abundance differences for elements with Z <= 30 between both components of this system and a trend of these abundances as a function of the condensation temperature (T-c), which suggests a spectral chemical signature related to planet formation. In this work we show that our previous findings are still consistent even if we include more species, such as the volatile N and neutron capture elements (Z > 30). We report a slope with T-c of 1.56 +/- 0.24 x 10(-5) dex K-1, that is good agreement with our previous work. We also performed some tests using ARES and iSpec to measure automatically the equivalent width and found T-c slopes in reasonable agreement with our results as well. In addition, we determined abundances for Li and Be by spectral synthesis, finding that 16 Cyg A is richer not only in Li but also in Be, when compared to its companion. This may be evidence of planet engulfment, indicating that the T-c trend found in this binary system may be a chemical signature of planet accretion in the A component, rather than an imprint of the giant planet rocky core formation on 16 Cyg B. (AU)