439 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GrazAT211 papers
- Graz University of TechnologyAT46 papers
- Austrian Academy of SciencesAT17 papers
- Centre National de la Recherche ScientifiqueFR16 papers
- University of ViennaAT16 papers
- Institute of High Energy PhysicsCN13 papers
- Justus-Liebig-Universität GießenDE13 papers
- Heidelberg UniversityDE11 papers
- European Southern ObservatoryCL8 papers
- GSI Helmholtz Centre for Heavy Ion ResearchDE7 papers
- Helmholtz-Zentrum Dresden-RossendorfDE7 papers
- Jožef Stefan InstituteSI7 papers
18 papers · 1 filter
Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
Nora L. Eisner, Cole Johnston, Silvia Toonen +37
We report the discovery and analysis of a massive, compact, hierarchical triple system (TIC 470710327) initially identified by citizen scientists in data obtained by NASA's Transit…
Weighing stars from birth to death: mass determination methods across the HRD
Aldo Serenelli, Achim Weiss, Conny Aerts +31
The mass of a star is the most fundamental parameter for its structure, evolution, and final fate. It is particularly important for any kind of stellar archaeology and characteriza…
A Hot Cusp-Shaped Confined Solar Flare
Aaron Hernandez-Perez, Yang Su, Julia K. Thalmann +5
We analyze a confined flare that developed a hot cusp-like structure high in the corona (H ~ 66 Mm). A growing cusp-shaped flare arcade is a typical feature in the standard model o…
Pre-eruption processes: heating, particle acceleration and the formation of a hot channel before the 2012 October 20 M9.0 limb flare
Aaron Hernandez-Perez, Yang Su, Astrid M. Veronig +3
We report a detailed study of the pre-eruption activities that led to the occurrence of an M9.0 flare/CME event on 2012 October 20 in NOAA AR 11598. This includes the study of the…
VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects
J. Varga, P. Ábrahám, L. Chen +13
Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially…
The Dependence of the Peak Velocity of High-Speed Solar Wind Streams as Measured in the Ecliptic by ACE and the STEREO satellites on the Area and Co-Latitude of their Solar Source Coronal Holes
Stefan J. Hofmeister, Astrid Veronig, Manuela Temmer +3
We study the properties of 115 coronal holes in the time-range from 2010/08 to 2017/03, the peak velocities of the corresponding high-speed streams as measured in the ecliptic at 1…
Generation mechanisms of quasi-parallel and quasi-circular flare ribbons in a confined flare
Aaron Hernandez-Perez, Julia K. Thalmann, Astrid M. Veronig +3
We analyze a confined multiple-ribbon M2.1 flare (SOL2015-01-29T11:42) that originated from a fan-spine coronal magnetic field configuration, within active region NOAA 12268. The o…
Mid-infrared interferometric variability of DG Tau: implications for the inner-disk structure
J. Varga, K. É. Gabányi, P. Ábrahám +12
Context. DG Tau is a low-mass pre-main sequence star, whose strongly accreting protoplanetary disk exhibits a so-far enigmatic behavior: its mid-infrared thermal emission is strong…
Mid-infrared characterization of the planetary-mass companion ROXs 42B b
Sebastian Daemgen, Kamen Todorov, Jasmin Silva +10
We present new Keck/NIRC2 35 m infrared photometry of the planetary-mass companion to ROXS 42B in , and for the first time in Brackett- (Br) and in $M_\mathrm…
Hunting for Stellar Coronal Mass Ejections
Heidi Korhonen, Krisztian Vida, Martin Leitzinger +2
Coronal mass ejections (CMEs) are explosive events that occur basically daily on the Sun. It is thought that these events play a crucial role in the angular momentum and mass loss…
Indications of stellar prominence oscillations on fast rotating stars: the cases of HK Aqr and PZ Tel
M. Leitzinger, P. Odert, T. V. Zaqarashvili +3
We present the analysis of six nights of spectroscopic monitoring of two young and fast rotating late-type stars, namely the dMe star HK Aqr and the dG/dK star PZ Tel. On both star…
Investigating magnetic activity in very stable stellar magnetic fields: long-term photometric and spectroscopic study of the fully convective M4 dwarf V374 Peg
K. Vida, L. Kriskovics, K. Oláh +8
The ultrafast-rotating () fully convective single M4 dwarf V374 Peg is a well-known laboratory for studying intense stellar activity in a stable magnet…
The Matryoshka Disk: Keck/NIRC2 Discovery of a Solar System-Scale, Radially Segregated Residual Protoplanetary Disk Around HD 141569A
Thayne Currie, Carol Grady, Ryan Cloutier +7
Using Keck/NIRC2 (3.78 ) data, we report the direct imaging discovery of a scattered light-resolved, solar system-scale residual protoplanetary disk around the young…
Orbits in the T Tauri triple system observed with SPHERE
R. Köhler, M. Kasper, T. M. Herbst +2
We present new astrometric measurements of the components in the T Tauri system, and derive new orbits and masses. T Tauri was observed during the science verification time of the…
DR Tau: Temporal variability of the brightness distribution in the potential planet-forming region
Robert Brunngräber, Sebastian Wolf, Thorsten Ratzka +1
We investigate the variability of the brightness distribution and the changing density structure of the protoplanetary disk around DR Tau, a classical T Tauri star. DR Tau is known…
The VISTA Carina Nebula Survey II. Spatial distribution of the infrared-excess-selected young stellar population
Peter Zeidler, Thomas Preibisch, Thorsten Ratzka +2
We performed a deep wide-field (6.76 deg^2) near-infrared survey with the VISTA telescope that covers the entire extent of the Carina nebula complex (CNC). The point-source catalog…
Improvements on coronal hole detection in SDO/AIA images using supervised classification
Martin A. Reiss, Stefan J. Hofmeister, Ruben De Visscher +5
We demonstrate the use of machine learning algorithms in combination with segmentation techniques in order to distinguish coronal holes and filaments in SDO/AIA EUV images of the S…
The Kelvin-Helmholtz Instability at CME-Boundaries in the Solar Corona: Observations and 2.5D MHD Simulations
U. V. Möstl, M. Temmer, A. M. Veronig
The Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory observed a coronal mass ejection with an embedded filament on 2011 February 24, reavealing quasi-periodic vo…