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Center-to-limb variation of intensity and polarization in continuum spectra of FGK stars for spherical atmospheres
N. M. Kostogryz, I. Milic, S. V. Berdyugina +1
One of the necessary parameters needed for the interpretation of the light curves of transiting exoplanets or eclipsing binaries, as well as interferometric measurements of a star…
M dwarfs and the fraction of high carbon-to-oxygen stars in the solar neighbourhood
John E. Gizis, Zachary Marks, Peter H. Hauschildt
We investigate the frequency of high carbon-to-oxygen (C/O ) M dwarf stars in the solar neighbourhood. Using synthetic spectra, we find that such M dwarfs would have weaker…
Search with UVES and XSHOOTER for signatures of the low-mass secondary in the post common-envelope binary AA Dor
D. Hoyer, T. Rauch, K. Werner +2
AA Dor is a close, totally eclipsing, post common-envelope binary with an sdOB-type primary and an extremely low-mass secondary, located close to the mass limit of stable central h…
Solar science with the Atacama Large Millimeter/submillimeter Array - A new view of our Sun
S. Wedemeyer, T. Bastian, R. Brajsa +35
The Atacama Large Millimeter/submillimeter Array (ALMA) is a new powerful tool for observing the Sun at high spatial, temporal, and spectral resolution. These capabilities can addr…
Identification of the feature that causes the I-band secondary maximum of a type Ia supernova
D. Jack, E. Baron, P. H. Hauschildt
We obtained a time series of spectra covering the secondary maximum in the I-band of the bright Type Ia supernova 2014J in M82 with the TIGRE telescope. Comparing the observations…
What causes the large extensions of red-supergiant atmospheres? Comparisons of interferometric observations with 1-D hydrostatic, 3-D convection, and 1-D pulsating model atmospheres
B. Arroyo-Torres, M. Wittkowski, A. Chiavassa +6
We present the atmospheric structure and the fundamental parameters of three red supergiants, increasing the sample of RSGs observed by near-infrared spectro-interferometry. Additi…