Zobrazeno 1 - 10
of 146 382
pro vyhledávání: '"H. Le"'
Autor:
VandenBerg, Don A.
Stellar evolutionary tracks for $0.12 \le M/M_\odot \le 1.0$ have been computed for each of several variations in the abundances of C, N, and O, assuming mass-fraction helium abundances $Y = 0.25$ and $0.29$, and 11 metallicities in the range $-1.5 \
Externí odkaz:
http://arxiv.org/abs/2211.03913
Autor:
Aguado, D., Molaro, P., Caffau, E., Hernández, J. I. González, Osorio, M. Zapatero, Bonifacio, P., Prieto, C. Allende, Rebolo, R., Damasso, M., Mascareño, A. Suárez, Howell, S. B., Furlan, E., Cristiani, S., Cupani, G., Di Marcantonio, P., D'Odorico, V., Lovis, C., Martins, C. J. A. P., Milakovic, D., Murphy, M. T., Nunes, N. J., Pepe, F., Santos, N. C., Schmidt, T. M., Sozzetti, A.
Publikováno v:
A&A 668, A86 (2022)
HE 0107$-$5240 is a hyper metal-poor star with $\rm [Fe/H]=-5.39$. We performed high-res observations with the ESPRESSO spectrograph at the VLT to constrain the kinematical properties of the binary system HE 0107$-$5240 and to probe the binarity of t
Externí odkaz:
http://arxiv.org/abs/2210.04910
Publikováno v:
Transactions of the Chinese Society of Agricultural Engineering. Aug2024, Vol. 40 Issue 15, p65-75. 11p.
Publikováno v:
2022 ApJ 928 18
We input solar wind parameters responsible for the main phases of 15 great geomagnetic storms (GGSs: $\Delta$SYM-H$\le-$200 nT) into the empirical formulae created by \cite{Burton1975}(hereafter Burton equation), and by \cite{OBrien2000}(hereafter OM
Externí odkaz:
http://arxiv.org/abs/2203.15278
We use $\Delta$SYM-H to capture the variation in the SYM-H index during the main phase of a geomagnetic storm. We define great geomagnetic storms as those with $\Delta$SYM-H $\le$ -200 nT. After analyzing the data that were not obscured by solar wind
Externí odkaz:
http://arxiv.org/abs/2009.05971
Autor:
de Bondt, Michiel
We compute by hand all quadratic homogeneous polynomial maps $H$ and all Keller maps of the form $x + H$, for which ${\rm rk} J H = 3$, over a field of arbitrary characteristic. Furthermore, we use computer support to compute Keller maps of the form
Externí odkaz:
http://arxiv.org/abs/1711.00904
Autor:
Zhao, G., Mashonkina, L., Yan, H. L., Alexeeva, S., Kobayashi, C., Pakhomov, Yu., Shi, J. R., Sitnova, T., Tan, K. F., Zhang, H. W., Zhang, J. B., Zhou, Z. M., Bolte, M., Chen, Y. Q., Li, X., Liu, F., Zhai, M.
For the first time, we present an extensive study of stars with individual non-local thermodynamic equilibrium (NLTE) abundances for 17 chemical elements from Li to Eu in a sample of stars uniformly distributed over the $-2.62 \le$ [Fe/H] $\le +0.24$
Externí odkaz:
http://arxiv.org/abs/1610.00193
Canonical grids of stellar evolutionary sequences have been computed for the helium mass-fraction abundances $Y = 0.25$, $0.29$, and $0.33$, and for iron abundances that vary from $-2.4$ to $+0.4$ (in 0.2 dex increments) when [$\alpha$/Fe] $= +0.4$,
Externí odkaz:
http://arxiv.org/abs/1409.1283
Autor:
Tschudi, C., Schmid, H. M., Nowak, M., Coroller, H. Le, Hunziker, S., van Holstein, R. G., Perrot, C., Mouillet, D., Augereau, J. -C., Bazzon, A., Beuzit, J. L., Boccaletti, A., Bonse, M. J., Chauvin, G., Desidera, S., Dohlen, K., Dominik, C., Engler, N., Feldt, M., Girard, J. H., Gratton, R., Henning, Th., Kasper, M., Kervella, P., Lagrange, A. -M., Langlois, M., Martinez, P., Ménard, F., Meyer, M. R., Milli, J., Pragt, J., Puget, P., Quanz, S. P., Roelfsema, R., Sauvage, J. -F., Szulagyi, J., Thalmann, Ch., Zurlo, A.
We carried out very deep VLT/SPHERE imaging polarimetry of the nearby system Eps Eri based on 38.5 hours of integration time with a 600 - 900 nm broadband filter to search for polarized scattered light from a planet or from circumstellar dust using A
Externí odkaz:
http://arxiv.org/abs/2404.19504