Astrophysics Science Division
 

Upcoming Events

Wednesday, April 30, 2025
02:00 PM - 03:30 PM
Engineering Colloquium
Applications and Hazards of Lithium-Ion Batteries
Jessica Gallo,Fire Protection Consultant at Fire & Risk Alliance (FRA)
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Thursday, May 01, 2025
12:00 PM - 01:00 PM
Special Seminar
Relativistically Broadened Line Emission Morphology: Encoding Black Hole & Accretion Disk Parameters
Delilah Gates (CfA Harvard, Black Hole Initiative)

Single-frequency emission from an accretion disk around a black hole is broadened into a line profile due to gravity and the motion of the disk relative to the observer. In this talk, I present unified analytical explanation for the line profile morphological features (i.e., its extent, kinks, and fall-off), and show how these features can be used to constrain black hole spin, observer inclination, and locations of the disk's inner and outer edges, working in the Standard disk model wherein particles in the disk travel on stable circular orbits. The line profile morphological features are model-dependent. Thus we also explore select models wherein disk particles deviate from stable circular orbits, demonstrating that our understanding of black hole and disk properties can be highly sensitive to the model assumptions made when interpreting measurements.

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Tuesday, May 06, 2025
03:00 PM - 04:00 PM
SED Town Hall
The agenda will be shared with the Teams link as we get closer to the event. Actual start time is 3:10 p.m.
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