Calendar

Aug
28
Tue
ASTR 620 – Planetary Processes
Aug 28 @ 8:55 am – 10:10 am
ASTR 555 – Galaxies I
Aug 28 @ 11:45 am – 1:00 pm
ASTR 555 - Galaxies I
Society of Astronomy Students Meeting
Aug 28 @ 4:00 pm – 5:00 pm
Aug
29
Wed
ASTR 545 – Stellar Spectroscopy
Aug 29 @ 11:00 am – 12:15 pm
ASTR 545 - Stellar Spectroscopy
Aug
30
Thu
ASTR 620 – Planetary Processes
Aug 30 @ 8:55 am – 10:10 am
ASTR 555 – Galaxies I
Aug 30 @ 11:45 am – 1:00 pm
ASTR 555 - Galaxies I
Aug
31
Fri
Colloquium: Don Terndrup (Host: Nancy Chanover)
Aug 31 @ 3:15 pm – 4:15 pm
Colloquium: Don Terndrup (Host: Nancy Chanover) @ BX102

Stellar Winds and Stellar Rotation

Don Terndrup, Ohio State University

For more than 50 years, we have known that stars rotate quickly when they are young and slow down as they age.  This process gives us important clues about magnetic field strength and geometry, as well as the nature of stellar winds, in solar-like stars.  We have been working to put the analysis of stellar rotation on a modern statistical footing, and in this talk I will give you an update on our efforts.  There are a number of critical observational problems that must be considered in calibrating models of angular momentum loss, especially problems of data censorship (older or less active stars are not detected in studies of rotation).  I will conclude by evaluating the prospects for using stellar rotation as an age indicator, and demonstrate that such ages are far less precise – though still useful – than our group and others have previously claimed.

 

 

Sep
4
Tue
ASTR 620 – Planetary Processes
Sep 4 @ 8:55 am – 10:10 am
ASTR 555 – Galaxies I
Sep 4 @ 11:45 am – 1:00 pm
ASTR 555 - Galaxies I
Society of Astronomy Students Meeting
Sep 4 @ 4:00 pm – 5:00 pm