Distribution of Eclipsing Binaries in the SMC and LMC

There are some awesome surveys of variability that are being under utilized. One such gem is OGLE, which now has a catalog of over 48k eclipsing binary star systems in the SMC and LMC!

With such a large sample, and near complete coverage of SMC/LMC (and in-between….) it would be amazing to see: are there variations of the eclipsing binary star population over an entire galaxy?

To do so, you might combine this variability survey with other spatial surveys that have traced the star formation history of the LMC/SMC… here’s a more recent paper on the subject.

We (or at least I) might naively expect that the orbital period distribution would be changed as a function of mean age of the stars in a spatial bin - in other words, dynamic processing would harden (shorten) the periods over time. Long period, detached systems would become more rare over time, and so also increasing the fraction of W UMa type systems.

Here’s a catalog with some updated fits to the light curves for the OGLE-III LMC systems.

Finally, working in the temporal-spatial domain is good practice for the forthcoming “LSST era”. As they say, publish early, publish often!