Joint Physics Dept.–Inst. for Space Weather Sci. Colloquium

April 30, Wednesday (** SPECIAL DAY**)

Sun-as-a-Star Flare Observations with High-Resolution Telescopes

Dr. Alexander Pietrow

Leibniz Institute for Astrophysics Potsdam, Germany

(Solar Physics, Host: Haimin Wang)

Room: ECE 202

Time: 11:45 am - 12:45 pm with 11:30 am teatime

*ZOOM Meeting ID for those who cannot attend in-person: 917 2169 7568

(APPROVAL by Prof Ahn REQUIRED for APPH/MTSE PhD Students to attend online)

*Password: check email or request from kenahn@njit.edu

Stellar flares cannot be spatially resolved, meaning we have to extract complex three-dimensional behavior from a one-dimensional disk-integrated spectral timeseries. Due to their proximity to Earth, solar flares can serve as a stepping stone for understanding their stellar counterparts, especially when using a Sun-as-a-star instrument in combination with spatially resolved observations. In this talk, I will discuss how high-resolution observations with a limited field-of-view can be converted into approximations of disk-integrated spectra using the newly developed Numerical Sun-as-a-Star Integrator (NESSI). Our findings suggest common patterns in the disk-integrated spectra between flares of different strengths and locations that can be used to better interpret stellar flares without resolved context.