effectiveness of phase dispersion minimization in gyrochronology by: jeremy stone
DESCRIPTION
Effectiveness Of Phase Dispersion Minimization In Gyrochronology By: Jeremy Stone. Introduction. Simulated Data Barry Lutz Telescope (BLT) Data Catalina Sky Survey Data. Example Light Curve. Period = 7 days Amplitude = .05 Random error = 2%. Magnitude. Period (Minutes). Light Curve. - PowerPoint PPT PresentationTRANSCRIPT
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Effectiveness Of Phase Dispersion Minimization In Gyrochronology
By: Jeremy Stone
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Introduction
Simulated Data
Barry Lutz Telescope (BLT) Data
Catalina Sky Survey Data
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Example Light Curve
• Period = 7 days
• Amplitude = .05
• Random error = 2%M
agni
tude
Period (Minutes)0 1 2 3 4 5 6 7 8 9 101112131415161718192021222324252627282930
2.94
2.96
2.98
3
3.02
3.04
3.06
3.08
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Light Curve
0 1 2 3 4 5 6 7 8 9 10 11 122.94
2.96
2.98
3
3.02
3.04
3.06
Period (Days)
Mag
nitu
de
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Period
0 2 4 6 8 10 Period (days)
1
.9
.8
Thet
a
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HIP 19859
Target Star
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HIP 19859 Light Curve
2455980 2455985 2455990 2455995 2456000 2456005 2456010 24560152.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3
Date (HJD)
Rel
ativ
e M
agni
tude
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HIP 19859 Period
0 2 4 6 8 10
Period (Days)
1
.8
.6
.4
.2
Thet
a
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Problems and Difficulties
Weather
Technical Issues
Errors
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Catalina Sky Survey
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Catalina Sky Survey
Started in 2005
Searching for near Earth objects
Photometry on 198 million objects
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HIP 3998 Light Curve
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PDM
.4 .6 .8 1 Period (Days)
1.5
1
.95
.9
.85
Thet
a
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Comparing Ages
Collected ages from published papers
Gyrochonology equation P(B-V,t) = f(B-V) * g(t)
Where f(B-V) = (0.7725 ± 0.011) (B-V0-0.4)0.601±0.024
And g(t)=t0.5189±0.0070
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Thanks
NASA Space Grant
Northern Arizona University
Dr. Koerner
Dr. Barlow and Kathleen Stigmon