Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Maria Bergemann"'
Autor:
Justin L. Xie, Evan N. Kirby, Andrew McWilliam, Maria Bergemann, Rachel Guo, Mithi A. C. de los Reyes, Anthony L. Piro, Mikhail Kovalev, Ken J. Shen
Publikováno v:
The Astrophysical Journal
There is no consensus on the progenitors of Type Ia supernovae (SNe Ia) despite their importance for cosmology and chemical evolution. We address this question by using our previously published catalogs of Mg, Si, Ca, Cr, Fe, Co, and Ni abundances in
Autor:
Gregory R. Ruchti, Ralph Schoenrich, Rene Andrae, Remo Collet, Zazralt Magic, Mikhail Kovalev, C. J. Hansen, Maria Bergemann
Publikováno v:
Bergemann, M, Collet, R, Schönrich, R, Andrae, R, Kovalev, M, Ruchti, G, Hansen, C J & Magic, Z 2016, ' Non-local thermodynamic equilibrium stellar spectroscopy with 1D and 3D models-II. Chemical properties of the Galactic metal-poor disk and the halo ', arXiv .
NASA Astrophysics Data System
Aarhus University
Bergemann, M, Collet, R, Schoenrich, R, Andrae, R, Kovalev, M, Ruchti, G, Hansen, C J & Magic, Z 2017, ' Non-local Thermodynamic Equilibrium Stellar Spectroscopy with 1D and <3D > Models. II. Chemical Properties of the Galactic Metal-poor Disk and the Halo ', Astrophysical Journal, vol. 847, no. 1, 16 . https://doi.org/10.3847/1538-4357/aa88b5
NASA Astrophysics Data System
Aarhus University
Bergemann, M, Collet, R, Schoenrich, R, Andrae, R, Kovalev, M, Ruchti, G, Hansen, C J & Magic, Z 2017, ' Non-local Thermodynamic Equilibrium Stellar Spectroscopy with 1D and <3D > Models. II. Chemical Properties of the Galactic Metal-poor Disk and the Halo ', Astrophysical Journal, vol. 847, no. 1, 16 . https://doi.org/10.3847/1538-4357/aa88b5
From exploratory studies and theoretical expectations it is known that simplifying approximations in spectroscopic analysis (LTE, 1D) lead to systematic biases of stellar parameters and abundances. These biases depend strongly on surface gravity, tem
Autor:
M. Tucci Maia, M. Castro, Jacob L. Bean, Jorge Melendez, J. D. do Nascimento, Amanda I. Karakas, A. Alves-Brito, I. Ramirez, Martin Asplund, David Yong, M. Bazot, TalaWanda R. Monroe, Megan Bedell, Fabrício C. Freitas, Maria Bergemann
Publikováno v:
NASA Astrophysics Data System
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We study with unprecedented detail the chemical composition and stellar parameters of the solar twin 18 Sco in a strictly differential sense relative to the Sun. Our study is mainly based on high resolution (R ~ 110 000) high S/N (800-1000) VLT UVES
Autor:
J. Zachary Gazak, Ben Davies, Nate Bastian, Rolf Kudritzki, Eva Schinnerer, Bertrand Plez, Lee Patrick, Maria Bergemann, Chris Evans, Fabio Bresolin
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2014, 787 (2), pp.142
The Astrophysical Journal, American Astronomical Society, 2014, 787 (2), pp.142
We demonstrate how the metallicities of young super star clusters can be measured using novel spectroscopic techniques in the J-band. The near-infrared flux of super star clusters older than ~6 Myr is dominated by tens to hundreds of red supergiant s