Dartmouth Events

Physics & Astronomy Colloquium - Dr. Allison Youngblood, NASA GSFC

Title: "The ultraviolet view of stellar activity"

Friday, April 12, 2024
3:30pm – 4:30pm
Steele 006 & Zoom
Intended Audience(s): Public
Categories: Arts and Sciences, Lectures & Seminars

Abstract: Understanding the magnetic activity of low-mass stars (FGKM dwarfs) is a key component of the “Worlds and Suns in Context” priority area of the Astro2020 Decadal Survey. Stellar activity not only affects exoplanet discovery and characterization efforts, but also can alter the emergent spectra of exoplanets by driving atmospheric heating and photochemistry. Ultraviolet (UV) observations directly probe stellar activity and provide important inputs to exoplanet atmosphere models. I will describe large, multi-wavelength surveys designed to capture the high-energy spectral energy distributions and flaring behavior of low-mass stars, including a survey of the JWST Cycle 1 transiting exoplanet host stars and a survey of young and old M dwarfs. I will also describe how UV mission concepts currently in development, such as ESCAPE and HWO, can provide much-needed new information about stellar activity and the environments of exoplanets.

Hosted by PhD Graduate Student James Logan & Professor Elisabeth Newton

***Join before the Colloquium at 3:00 pm for coffee, cookies and brownies from Lou's in Wilder 103!***

Please click the link below to join the webinar:
Email Physics.Department@dartmouth.edu for passcode


For more information, contact:
Tressena Manning

Events are free and open to the public unless otherwise noted.