52 citations · 229 across the 13 of their papers we have counts for
13 papers
Using raytracing to derive the expected performance of STELLA's SES-VIS spectrograph
Michael Weber, Klaus Strassmeier, Manfred Woche +2
The visual STELLA echelle spectrograph (SES-VIS) is a new instrument for the STELLA-II telescope at the Izaña observatory on Tenerife. Together with the original SES spectrograph -…
Second generation spectroscopic instrumentation for the STELLA robotic observatory
Michael Weber, Manfred Woche, Klaus G. Strassmeier +2
The current STELLA Echelle spectrograph (SES), which records 390nm to 870nm in one shot at a spectral resolution of 55000, will be replaced by a suite of specialized spectrographs…
On the binary orbit of Henry Draper one (HD 1)
Klaus G. Strassmeier, Michael Weber
We present our final orbit for the late-type spectroscopic binary HD 1. Employed are 553 spectra from 13 years of observations with our robotic STELLA facility and its high-resolut…
Spatially Resolved Ultraviolet Spectroscopy of the Great Dimming of Betelgeuse
Andrea K. Dupree, Klaus G. Strassmeier, Lynn D. Matthews +9
The bright supergiant, Betelgeuse (Alpha Orionis, HD 39801) experienced a visual dimming during 2019 December and the first quarter of 2020 reaching an historic minimum 2020 Februa…
Spectangular: Disentangling variable spectra
Daniel P. Sablowski, Silva Järvinen, Michael Weber
Spectangular is a GUI based software package written in C++ designed for spectral disentangling on the wavelength scale. The code disentangles spectra of SB1 and SB2 systems and ca…
Contemporaneous Imaging Comparisons of the Spotted Giant Geminorum Using Interferometric, Spectroscopic, and Photometric Data
Rachael M. Roettenbacher, John D. Monnier, Heidi Korhonen +8
Nearby, active stars with relatively rapid rotation and large starspot structures offer the opportunity to compare interferometric, spectroscopic, and photometric imaging technique…
Spectral disentangling with Spectangular
Daniel P. Sablowski, Michael Weber
The paper introduces the software Spectangular for spectral disentangling via singular value decomposition with global optimisation of the orbital parameters of the stellar system…
The LEECH Exoplanet Imaging Survey: Orbit and Component Masses of the Intermediate Age, Late-Type Binary NO UMa
Joshua E. Schlieder, Andrew J. Skemer, Anne-Lise Maire +21
We present high-resolution Large Binocular Telescope LBTI/LMIRcam images of the spectroscopic and astrometric binary NO UMa obtained as part of the LBTI Exozodi Exoplanet Common Hu…
Stellar rotation, binarity, and lithium in the open cluster IC4756
Klaus G. Strassmeier, Joerg Weingrill, Thomas Granzer +3
An important aspect in the evolutionary scenario of cool stars is their rotation and the rotationally induced magnetic activity and interior mixing. Stars in open clusters are part…
Surface differential rotation of IL Hya from time-series Doppler images
Zsolt Kővári, Levente Kriskovics, Katalin Oláh +4
We present a time-series Doppler imaging study of the K-subgiant component in the RS CVn-type binary system IL Hya (P orb=12.905 d). From re-processing the unique long-term spectro…
Doppler imaging of stellar surface structure - XXIV. The lithium-rich single K-giants DP Canum Venaticorum and DI Piscium
Zs. Kovari, H. Korhonen, K. G. Strassmeier +3
We present the first Doppler imaging study of the two rapidly rotating, single K-giants DP CVn and DI Psc in order to study the surface spot configuration and to pinpoint their ste…
The spectroscopic orbit of Capella revisited
Michael Weber, Klaus G. Strassmeier
Context. Capella is among the few binary stars with two evolved giant components. The hotter component is a chromospherically active star within the Hertzsprung gap, while the cool…
Three years of experience with the STELLA robotic observatory
Thomas Granzer, Michael Weber, Klaus G. Strassmeier
Since May 2006, the two STELLA robotic telescopes at the Izana observatory in Tenerife, Spain, delivered an almost uninterrupted stream of scientific data. To achieve such a high l…