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https://github.com/bmorris3/salter

Stellar Active Latitudes with Transiting Exoplanet Residuals

https://github.com/bmorris3/salter

Science Score: 10.0%

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Stellar Active Latitudes with Transiting Exoplanet Residuals

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Created over 8 years ago · Last pushed almost 8 years ago

https://github.com/bmorris3/salter/blob/master/ 

# salter
Stellar Active Latitudes with Transiting Exoplanet Residuals

![](logo.png)

### The Problem
Do other stars have active latitudes, as we seen on [the Sun](https://en.wikipedia.org/wiki/Sprer%27s_law)? If so, it's something very basic and important related to the dynamo and convection properties.

One of the best (only?) other determinations of this is from analysis of *Kepler* data for Hat-P-11 by [Morris et al.](https://arxiv.org/abs/1708.02583) This system is very unique, in both geometry and brightness.

How else can we constrain the starspots/activity as a function of latitude?!

### Idea
Let's use ensemble transit data. If we use transits with many different impact parameters, we'll be sensitive to a wide range of latitudes. Now the game is measuring the in- vs. out-of-transit scatter as a function of latitude due to starspot occultations.

### Prep your local data cache
1. First open and run the notebook `choose_targets.ipynb`.

2. In the repo, run this to construct and cache the database of kepler light curves (runtime = ~1 hr on conference wifi)
```
python -c "from salter import cache_light_curves; cache_light_curves()"
```
3. Run this to cache a local copy of the joined tables from the NASA Exoplanet Archive and the Exoplanet Orbit Database:
```
python -c "from salter import cache_planets_table; cache_planets_table()"
```

### Example notebook:

Open up the notebook `show_lc.ipynb` to see what the package can do.

### Dependencies

* numpy
* matplotlib
* scipy
* h5py, hdf5
* astropy
* batman
* kplr
* astroquery

Owner

  • Name: Brett M. Morris
  • Login: bmorris3
  • Kind: user
  • Location: Baltimore, MD
  • Company: @SpaceTelescope

Software engineer & astronomer.

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Dependencies

requirements.txt pypi
  • astropy *
  • astroquery *
  • batman-package *
  • h5py *
  • kplr *
  • matplotlib *
  • numpy *
  • scipy *
setup.py pypi
  • astropy *
  • s.strip *