From fa12bff0d4886e64bdcb82078e505e94608d9d02 Mon Sep 17 00:00:00 2001 From: przemekmroz Date: Fri, 28 May 2021 12:04:01 +0200 Subject: [PATCH] eclipsing variable star guide --- config.defaults.yaml | 4 ++ data/golden/eclipsing.csv | 100 ++++++++++++++++++++++++++++++++++ doc/field_guide__eclipsing.md | 32 +++++++++++ 3 files changed, 136 insertions(+) create mode 100644 data/golden/eclipsing.csv create mode 100644 doc/field_guide__eclipsing.md diff --git a/config.defaults.yaml b/config.defaults.yaml index 1cd788b7..cd4b5b91 100644 --- a/config.defaults.yaml +++ b/config.defaults.yaml @@ -105,3 +105,7 @@ docs: srv: coordinates: [330.302266, 66.153712] title: Semi Regular Variable + eclipsing: + coordinates: [13.572527, 8.874651] + period: 1.739625 + title: Eclipsing variable diff --git a/data/golden/eclipsing.csv b/data/golden/eclipsing.csv new file mode 100644 index 00000000..6b9cc4d6 --- /dev/null +++ b/data/golden/eclipsing.csv @@ -0,0 +1,100 @@ +274.146463,-11.304450 +299.123212,22.256431 +299.937024,36.814352 +287.900210,12.052041 +272.476947,8.065136 +290.223264,22.898495 +297.565665,36.039720 +299.394481,12.683093 +287.814253,1.040708 +291.524111,21.124597 +312.714137,33.676498 +62.164659,52.399149 +295.240507,38.108905 +285.846845,-6.103430 +294.619528,34.983123 +298.554180,17.973026 +325.951714,46.814714 +297.496568,27.683638 +331.906743,52.762615 +283.987243,-2.104873 +293.916020,23.191226 +289.935838,24.505788 +294.872445,27.314646 +335.163847,48.169566 +72.920711,54.668397 +332.418060,50.449305 +94.665614,21.043275 +293.648889,14.307628 +44.026125,63.856213 +300.008086,36.311764 +271.770552,3.299863 +285.124653,13.537304 +330.564459,49.332061 +317.917853,46.636967 +295.925777,29.422887 +296.875210,48.483398 +290.851681,23.131892 +276.961671,-6.238794 +294.877270,18.282953 +285.000444,16.456491 +95.387552,18.200595 +293.389604,16.613031 +287.477976,-2.279015 +294.638968,13.291402 +286.630881,2.389807 +296.002730,47.411598 +23.999596,57.215157 +287.920100,-1.730727 +297.095942,16.051791 +311.409500,36.020147 +286.776135,0.599607 +286.388330,-3.110564 +294.287901,23.528234 +286.447203,36.109189 +277.089832,-8.190509 +297.750232,17.243874 +303.543340,17.510479 +295.265102,16.537755 +297.349782,19.324243 +296.611745,32.744883 +275.093695,17.921072 +296.944836,30.618820 +299.908811,40.651812 +23.023140,52.201994 +292.834122,20.521963 +293.550161,47.587135 +285.120962,-2.202684 +294.633675,24.850993 +19.831804,60.073749 +289.843487,14.753683 +294.849534,25.563400 +293.757945,14.457332 +316.743447,56.059025 +283.909221,40.982551 +301.455248,35.386098 +283.304396,10.992555 +273.264710,-5.679077 +300.852949,22.434963 +296.056701,40.678053 +285.387382,-6.251603 +262.801902,3.530161 +290.121515,24.825112 +290.895606,23.868921 +306.978154,14.255226 +286.724912,19.212971 +275.422753,-14.404162 +295.240086,30.741167 +283.024534,-13.033560 +337.108420,49.349435 +310.263868,30.108541 +285.343810,11.409299 +13.572527,8.874651 +321.378594,44.533548 +293.192381,-7.433488 +295.486916,37.054133 +292.021086,0.698696 +292.817703,19.223730 +294.725792,15.377641 +295.466481,31.984389 +293.945801,28.674912 diff --git a/doc/field_guide__eclipsing.md b/doc/field_guide__eclipsing.md new file mode 100644 index 00000000..49bff6a0 --- /dev/null +++ b/doc/field_guide__eclipsing.md @@ -0,0 +1,32 @@ +## Eclipsing variables (ecl) + +Eclipsing variables are binary stars systems in which the orbital plane lies nearly in the line of sight of the observer. The binary components pass in front of one another from observer's perspective and so their combined brightness decreases periodically. + +### Classification and numbers +- Supertypes + - variable + - periodic +- Subtypes + - EA + - EB + - EW +- Occurrence rate: very common, about 106 expected in ZTF data + +### ZTF light curves +![ZTF eclipsing](data/eclipsing.png) + +#### Description +Eclipsing variables show regular, periodic "V-shape" dips in their phase folded light curves, which may be sharp or rounded, depending on the system. Their periods may range from minutes to years. Eclipse amplitudes vary from ~0.1 to several magnitudes. + +#### Light curve characteristics +- periodic variable +- Range of amplitudes (~0.1 to >1 mag) +- Periods (from minutes to years) + +![HR diagram of eclipsing variables](data/hr__eclipsing.png) + +![Period histogram of eclipsing variables](data/period__eclipsing.png) + +### References and further reading: +- Graczyk et al. (2011) The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. XII. Eclipsing Binary Stars in the Large Magellanic Cloud +- Soszynski et al. (2015) The OGLE Collection of Variable Stars. Over 450 000 Eclipsing and Ellipsoidal Binary Systems Toward the Galactic Bulge