ProjecteRASSUCDs – Ein neues Fenster zur magnetischen Aktivität auf Ultrakühlen Zwergen: eROSITA in Synergie mit…

Basic data

Acronym:
eRASSUCDs
Title:
Ein neues Fenster zur magnetischen Aktivität auf Ultrakühlen Zwergen: eROSITA in Synergie mit Multiwellenlaengenbeobachtungen
Duration:
1/1/2022 to 12/31/2024
Abstract / short description:
Ultracool dwarfs (UCDs) are defined as objects with spectral type M7 and later. The advent of the (nearly) all-sky space missions eROSITA and TESS opens a new window to UCDs, providing for the first time statistical samples of coronal X-ray emission and photospheric optical activity measures and surface rotation periods. eROSITA will increase the number of X-ray detected UCDs by at least a factor of 10, and it will enable a systematic study of flare variability thanks to its multi-epoch data (8 visits over 4 years). TESS provides optical flares and rotation periods that – according to previous studies – appear to be crucial for determining the type of activity in UCDs. This will be complemented by an in-depth study of UCDs for which the applicant of this funding request has collected multi-wavelength observations of all critical parameters for activity (X-rays, radio and rotation).

Involved staff

Managers

Institute of Astronomy and Astrophysics (IAAT)
Department of Physics, Faculty of Science

Local organizational units

Institute of Astronomy and Astrophysics (IAAT)
Department of Physics
Faculty of Science

Funders

Bonn, Nordrhein-Westfalen, Germany
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