Catwoman: A transit modelling Python package for asymmetric light curves
When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in time, owing to the planet being modelled as a circular area occulting the stellar surface. However, this signature might be asymmetric due to di...
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| Published in | arXiv.org |
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| Main Authors | , |
| Format | Paper Journal Article |
| Language | English |
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29.06.2021
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| ISSN | 2331-8422 |
| DOI | 10.48550/arxiv.2106.15643 |
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| Abstract | When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in time, owing to the planet being modelled as a circular area occulting the stellar surface. However, this signature might be asymmetric due to different temperature/pressure and/or chemical compositions in the different terminator regions of the transiting planet. catwoman is a Python package that allows to model these asymmetric transit lightcurves, calculating lightcurves for any radially symmetric stellar limb darkening law, and where planets are modelled as two semi-circles, of different radii, using the integration algorithm developed in arXiv:1507.08285 and implemented in the batman library, from which catwoman builds upon. |
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| AbstractList | Journal of Open Source Software, 2020, vol. 5, issue 55, id. 2382 When exoplanets pass in front of their stars, they imprint a transit
signature on the stellar light curve which to date has been assumed to be
symmetric in time, owing to the planet being modelled as a circular area
occulting the stellar surface. However, this signature might be asymmetric due
to different temperature/pressure and/or chemical compositions in the different
terminator regions of the transiting planet. catwoman is a Python package that
allows to model these asymmetric transit lightcurves, calculating lightcurves
for any radially symmetric stellar limb darkening law, and where planets are
modelled as two semi-circles, of different radii, using the integration
algorithm developed in arXiv:1507.08285 and implemented in the batman library,
from which catwoman builds upon. When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in time, owing to the planet being modelled as a circular area occulting the stellar surface. However, this signature might be asymmetric due to different temperature/pressure and/or chemical compositions in the different terminator regions of the transiting planet. catwoman is a Python package that allows to model these asymmetric transit lightcurves, calculating lightcurves for any radially symmetric stellar limb darkening law, and where planets are modelled as two semi-circles, of different radii, using the integration algorithm developed in arXiv:1507.08285 and implemented in the batman library, from which catwoman builds upon. |
| Author | Espinoza, Néstor Jones, Kathryn |
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| BackLink | https://doi.org/10.21105/joss.02382$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.2106.15643$$DView paper in arXiv |
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| Snippet | When exoplanets pass in front of their stars, they imprint a transit signature on the stellar light curve which to date has been assumed to be symmetric in... Journal of Open Source Software, 2020, vol. 5, issue 55, id. 2382 When exoplanets pass in front of their stars, they imprint a transit signature on the stellar... |
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| SubjectTerms | Algorithms Asymmetry Chemical composition Extrasolar planets Light curve Limb darkening Physics - Earth and Planetary Astrophysics Physics - Instrumentation and Methods for Astrophysics Stellar surfaces Transit |
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| Title | Catwoman: A transit modelling Python package for asymmetric light curves |
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