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of 32
pro vyhledávání: '"Berke, Daniel"'
Autor:
Labrie, Kathleen, Simpson, Chris, Cardenes, Ricardo, Turner, James, Soraisam, Monika, Quint, Bruno, Oberdorf, Oliver, Placco, Vinicius M., Berke, Daniel, Smirnova, Olesja, Conseil, Simon, Vacca, William D., Thomas-Osip, Joanna
DRAGONS (Data Reduction for Astronomy from Gemini Observatory North and South) is a platform for the reduction and processing of astronomical data. The Python-based, open-source package includes infrastructure for automation and algorithms for the pr
Externí odkaz:
http://arxiv.org/abs/2310.03048
Autor:
Lehmann, Christian, Murphy, Michael T., Liu, Fan, Flynn, Chris, Smith, Daniel, Berke, Daniel A.
The Survey for Distant Solar Twins (SDST) aims to find stars very similar to the Sun at distances 1-4 kpc, several times more distant than any currently known solar twins and analogues. The goal is to identify the best stars with which to test whethe
Externí odkaz:
http://arxiv.org/abs/2302.00399
Autor:
Murphy, Michael T., Berke, Daniel A., Liu, Fan, Flynn, Chris, Lehmann, Christian, Dzuba, Vladimir A., Flambaum, Victor V.
The fine structure constant, $\alpha$, sets the strength of the electromagnetic force. The Standard Model of particle physics provides no explanation for its value, which could potentially vary. The wavelengths of stellar absorption lines depend on $
Externí odkaz:
http://arxiv.org/abs/2211.05150
Autor:
Liu, Fan, Murphy, Michael T., Lehmann, Christian, Flynn, Chris, Smith, Daniel, Kos, Janez, Berke, Daniel A., Martell, Sarah L.
Studies of solar twins have key impacts on the astronomical community, but only $\sim$100--200 nearby solar twins ($<$ 1 kpc) have been reliably identified over the last few decades. The aim of our survey (SDST) is to identify $\sim$150--200 distant
Externí odkaz:
http://arxiv.org/abs/2210.09776
The rich absorption spectra of Sun-like stars are enticing probes for variations in the fine-structure constant, $\alpha$, which gauges the strength of electromagnetism. While individual line wavelengths are sensitive to $\alpha$, they are also sensi
Externí odkaz:
http://arxiv.org/abs/2210.08275
Probing Galactic variations in the fine-structure constant using solar twin stars: systematic errors
Sun-like stars are a new probe of variations in the fine-structure constant, $\alpha$, via the solar twins approach: velocity separations of close pairs of absorption lines are compared between stars with very similar stellar parameters, i.e. effecti
Externí odkaz:
http://arxiv.org/abs/2210.08276
Solar twins are stars of key importance to the field of astronomy and offer a multitude of science applications. Only a small number ($\lesssim200$) of solar twins are known today, all of which are relatively close to our Sun ($\lesssim800\,pc$). The
Externí odkaz:
http://arxiv.org/abs/2202.06469
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