Ninth Annual
C
of
I
S
T
U
D
E
N
T
R
E
S
E
A
R
C
H
C
O
N
F
E
R
E
N
C
E
2014 Archive
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Author(s): Rebecca Cook , Derek Tropf , Emanuil Yanev , Gary Parkinson , Scott Truksa
Presentation: poster
Two-color photometric measurements in V and B for 71 stars in globular cluster M92 were obtained on October 17, 2013 using the 0.35 m robotic telescope at The College of Idaho observatory. The images were calibrated in the usual manner and a color-magnitude diagram was constructed. The color-magnitude diagram clearly shows the horizontal, asymptotic giant, and the red giant sequences. Unfortunately, the data is insufficient to find the turn-off point of the main sequence, so an accurate age determination is not possible. An estimated age of 7.4 +/- 0.8 kpc was determined for M92 using a linear transformation to determine the V magnitudes for the horizontal branch stars, and an average absolute magnitude determined from the literature for eight different globular clusters.
The College of Idaho 2112 Cleveland Blvd Caldwell, ID 8360 USA 208-459-5011 800-2C-IDAHO