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Questions tagged [light-curve]

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4
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2answers
67 views

Classification and discovery of stars

How do astronomers find the difference between a 'Cephid Variable Star' and distinct normal stars with opaque objects blocking it's light, like stars with planets revolving around them while both ...
1
vote
0answers
31 views

Sinusoidal Light curve of an eclipsing binary

This light curve seems really weird to me, I'm used to seeing light curves where the barycenter is a straight line. It either stays at a place, moves at a constant speed or slowly increases its speed. ...
2
votes
2answers
210 views

Python: Find brightest pixel in fits-file and ignore brighter artefacts

I have 4000 fits-files images from SPITZER, each containing the same star over a time period. Each image is a photmetry cube of 32 pixel * 32 pixel * 64 consequent time frames. I need to look through ...
2
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0answers
71 views

How does the size of a naked black hole effect its photon sphere?

What effect does the size of a black hole have on the size or density photon sphere and proximity to the horizon? If a person is in space looking at 2 black holes (one of them big and the other ...
0
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0answers
78 views

About photometry and spectroscopy of eclipsing binaries

Suppose an eclipsing binary system whose orbital plane is inclined i=90º. What are the optimal conditions to measure the light curve? Would it be easy to measure radial velocities?
1
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0answers
112 views

Photometry data from Gaia

I am trying to get data from Gaia. Especially for Cepheids or RR Lyrae. On Gaia websites it say they have released some of the data however I cannot find it. I am looking for two columns with time and ...
1
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0answers
71 views

Where can I find detail on interpreting the exo-planet transit-data graphics used in the Zooniverse Project?

I'm participating in the Zooniverse Exoplanet-explorers project (transit method), which provides only minimal guidance on interpreting their light curve and transit data graphics, as visible here: ...
6
votes
1answer
95 views

What caused instant jumps and exactly flat periods in Kepler's light curves?

Last 65 days of Kepler's light curve for the infamous KIC 8462852 star is shown below from the published paper's graph. Skip the dips here, I wonder about two other features: Day 1559, during a ...