# Summary of K2 Program GO5083

Title: The effect of wide binaries on planet occurrence - K2 Campaigns 4&5

PI: Deacon, Niall R (Max Planck Institute for Astronomy)
CoIs: Mann, Andrew Withycombe; Kraus, Adam L

We plan to observe a sample of wide binaries spread across the K2 fields to constrain the effect of wide multiplicity on planet occurrence and to provide benchmark systems for gyrochronology.  Science Goal 1: Probe the effect of wide multiplicity on planet occurrence. Wide companions are common in the field; Raghavan et al (2010) found that >20% of solar-type stars have a companion wider than 100 AU. Any link between planet occurrence and wide multiplicity will have a significant effect on the number of habitable planets in the Galaxy. We propose to test the disruption of planetary systems caused by a wide companion proposed by Kaib et al. (2013). In this theory, wide companions interact with field stars and are sent into elliptical orbits bringing them close to their primary star, possibly close enough to disrupt a planetary system. This could eject planets from the system or provide an instigator for migration, moving giant planets closer to their parent star.  Science Goal 2: Provide benchmark gyrochronology systems. Wide binary systems contain stars which are physically isolated from each other yet share common metallicity and age. This means that the stars in these systems can be used to test age relations, which should give similar ages for both components. Kepler has already been used to accurately measure the rotation periods of thousands of stars. By including wide binary components as Kepler targets, we will produce a valuable legacy product to test and recalibrate gyrochronology relations allowing the ages of field stars to be more accurately determined.  
We have used the proper motion catalog of Kraus et al. (2014) to select pairs of objects with common proper motion. We have restricted ourselves to objects with significant proper motions above 30 milliarcseconds per year and have also set a condition of common distance (using distance moduli derived from SED fitting). In Fields 4 and 5 we also specifically exclude objects in the Pleiades and Praesepe which could contaminate our sample. We then restricted our sample to pairs which were close enough to make them unlikely to be purely coincident pairings between unrelated field stars. This resulted in 246 targets on silicon in fields 4 and 5.
 Over the course of the next two years we will target approximately 1000 stars across the 10 K2 fields yielding approximately 20 planets. We already have 116 targets accepted for Field 1 with 98 targets proposed for Field 3 (Field 2 suffers from crowding making clean target selection difficult). This will allow us to measure the occurrence of short period planets around stars in wide binaries and to test whether this deviates significantly from the field population. This will constrain the potential systematic bias on planet occurrence rates caused by multiplicity.

# Targets requested by this program that have been observed (115)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
211305600, 131.805201, 9.963297, 13.399, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211310148, 130.373596, 10.054744, 11.141, GO5020_LC|GO5104_LC|GO5106_LC|GO5083_LC
211325490, 126.135319, 10.361187, 15.776, GO5060_LC|GO5083_LC
211333883, 132.069998, 10.518812, 15.469, GO5083_LC
211354252, 132.078222, 10.891461, 14.924, GO5083_LC
211355256, 132.103147, 10.908845, 15.663, GO5083_LC
211358479, 134.129464, 10.963373, 15.685, GO5097_LC|GO5083_LC
211364959, 126.586583, 11.07537, 14.734, GO5020_LC|GO5060_LC|GO5083_LC
211370687, 134.1901, 11.170076, 15.69, GO5006_LC|GO5083_LC
211385861, 127.622842, 11.417546, 13.629, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211386686, 128.24379, 11.42995, 15.046, GO5083_LC|GO5006_LC
211387132, 128.252733, 11.437232, 15.613, GO5006_LC|GO5083_LC
211396082, 130.505146, 11.581516, 10.479, GO5007_LC|GO5029_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5083_LC
211396228, 130.503554, 11.583605, 12.349, GO5007_LC|GO5033_LC|GO5083_LC
211508015, 135.276231, 13.25258, 13.12, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211514036, 123.259797, 13.336807, 14.372, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211515573, 130.086541, 13.358313, 10.659, GO5007_LC|GO5033_LC|GO5104_LC|GO5023_LC|GO5083_LC
211515812, 130.088363, 13.361969, 11.624, GO5033_LC|GO5060_LC|GO5083_LC
211518952, 123.968692, 13.406159, 14.353, GO5006_LC|GO5020_LC|GO5060_LC|GO5083_LC
211519241, 123.96427, 13.410095, 15.763, GO5097_LC|GO5083_LC
211539827, 126.456087, 13.699605, 10.71, GO5020_LC|GO5089_LC|GO5104_LC|GO5083_LC
211571712, 123.553601, 14.1472, 15.1, GO5006_LC|GO5020_LC|GO5060_LC|GO5054_LC|GO5083_LC
211576951, 136.071347, 14.219963, 14.033, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211583213, 129.762744, 14.309504, 14.993, GO5007_LC|GO5083_LC
211599802, 125.920146, 14.536862, 13.901, GO5020_LC|GO5023_LC|GO5083_LC|GO5006_LC
211610401, 136.427347, 14.680091, 15.157, GO5083_LC
211612015, 135.963995, 14.701443, 14.232, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211625302, 131.364607, 14.89023, 13.212, GO5007_LC|GO5060_LC|GO5083_LC|GO5082_LC
211625718, 131.35894, 14.896325, 13.33, GO5007_LC|GO5060_LC|GO5083_LC
211638996, 129.198845, 15.083822, 10.315, GO5007_LC|GO5033_LC|GO5023_LC|GO5060_LC|GO5083_LC
211639080, 129.202264, 15.085172, 11.989, GO5007_LC|GO5033_LC|GO5083_LC
211641201, 130.138644, 15.11412, 13.939, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211642246, 124.93435, 15.128631, 15.915, GO5006_LC|GO5083_LC
211643845, 127.769078, 15.149973, 15.367, GO5046_LC|GO5083_LC
211689659, 123.648965, 15.775865, 12.362, GO5007_LC|GO5029_LC|GO5060_LC|GO5083_LC
211690043, 123.647135, 15.781116, 14.571, GO5007_LC|GO5020_LC|GO5083_LC|GO5011_LC
211694840, 125.074331, 15.846263, 14.871, GO5060_LC|GO5083_LC
211695388, 125.067891, 15.85395, 15.228, GO5060_LC|GO5083_LC
211695551, 125.365997, 15.856144, 12.417, GO5007_LC|GO5029_LC|GO5106_LC|GO5060_LC|GO5083_LC
211697006, 125.367258, 15.87552, 15.563, GO5083_LC
211708534, 124.911215, 16.028455, 14.51, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211712081, 127.32217, 16.077018, 15.994, GO5046_LC|GO5083_LC
211728461, 132.5425, 16.303496, 12.261, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5106_LC|GO5083_LC
211729649, 132.556703, 16.320425, 10.265, GO5007_LC|GO5029_LC|GO5033_LC|GO5060_LC|GO5083_LC
211729812, 127.995429, 16.322401, 14.864, GO5006_LC|GO5020_LC|GO5060_LC|GO5054_LC|GO5011_LC|GO5083_LC
211730296, 127.99872, 16.329411, 14.238, GO5006_LC|GO5020_LC|GO5060_LC|GO5011_LC|GO5083_LC|GO5054_LC
211739076, 134.248826, 16.453347, 13.639, GO5007_LC|GO5101_LC|GO5060_LC|GO5083_LC
211753284, 132.431056, 16.654026, 15.47, GO5060_LC|GO5054_LC|GO5083_LC
211756062, 124.359864, 16.692535, 14.756, GO5046_LC|GO5060_LC|GO5083_LC
211760168, 125.011329, 16.75051, 15.732, GO5046_LC|GO5083_LC
211772033, 123.191263, 16.919545, 13.538, GO5007_LC|GO5060_LC|GO5083_LC
211780879, 132.687602, 17.04518, 14.32, GO5083_LC
211781801, 129.807806, 17.057921, 15.048, GO5097_LC|GO5083_LC
211782303, 129.805418, 17.065189, 15.904, GO5083_LC|GO5097_LC|GO5011_LC
211783749, 130.273484, 17.085361, 14.523, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
211787098, 131.346644, 17.132441, 15.923, GO5083_LC
211788733, 125.270747, 17.155417, 11.952, GO5020_LC|GO5023_LC|GO5081_LC|GO5083_LC|GO5109_LC|GO5006_LC|GO5011_LC
211795497, 123.373075, 17.253136, 11.533, GO5007_LC|GO5029_LC|GO5104_LC|GO5106_LC|GO5060_LC|GO5083_LC
211796051, 123.378065, 17.261328, 11.124, GO5007_LC|GO5029_LC|GO5052_LC|GO5104_LC|GO5106_LC|GO5060_LC|GO5083_LC
211822497, 134.233946, 17.636142, 14.335, GO5020_LC|GO5060_LC|GO5054_LC|GO5083_LC
211822537, 134.245777, 17.636608, 15.718, GO5083_LC|GO5097_LC|GO5006_LC
211836516, 123.876018, 17.833903, 14.391, GO5006_LC|GO5020_LC|GO5097_LC|GO5060_LC|GO5083_LC|GO5011_LC
211836629, 127.988142, 17.83554, 9.122, GO5007_LC|GO5033_LC|GO5104_LC|GO5023_LC|GO5060_LC|GO5083_LC
211837237, 123.852676, 17.843986, 14.288, GO5020_LC|GO5083_LC|GO5097_LC|GO5011_LC|GO5006_LC
211837554, 127.9864, 17.8482, 10.504, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5083_LC
211839986, 134.018509, 17.881572, 12.937, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5060_LC|GO5083_LC
211842051, 126.213902, 17.909111, 14.47, GO5020_LC|GO5060_LC|GO5083_LC
211845605, 129.944581, 17.957939, 12.152, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5106_LC|GO5060_LC|GO5083_LC
211848700, 124.794535, 18.000296, 15.377, GO5083_LC|GO5054_LC
211889717, 127.982068, 18.575859, 15.649, GO5083_LC|GO5097_LC
211889763, 127.985325, 18.576417, 14.731, GO5020_LC|GO5023_LC|GO5083_LC|GO5006_LC
211913137, 134.136407, 18.921886, 12.843, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5060_LC|GO5083_LC
211922575, 136.325573, 19.062302, 11.717, GO5007_LC|GO5029_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5083_LC
211930757, 130.947874, 19.186065, 15.732, GO5083_LC
211931372, 124.66123, 19.195619, 14.746, GO5060_LC|GO5083_LC
211932361, 124.661057, 19.210736, 13.898, GO5007_LC|GO5060_LC|GO5083_LC
211939835, 124.259962, 19.322267, 12.167, GO5007_LC|GO5020_LC|GO5029_LC|GO5106_LC|GO5060_LC|GO5083_LC
211941940, 124.302085, 19.354274, 14.224, GO5020_LC|GO5083_LC
211946900, 131.197479, 19.427133, 9.21, GO5007_LC|GO5033_LC|GO5104_LC|GO5083_LC|GO5060_LC
211949026, 131.178085, 19.458394, 10.809, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5083_LC
211953174, 133.333474, 19.520553, 15.141, GO5083_LC
211953335, 133.336353, 19.522673, 15.555, GO5097_LC|GO5083_LC
211977175, 125.101222, 19.887985, 15.701, GO5006_LC|GO5083_LC
211978143, 126.449159, 19.903421, 14.697, GO5006_LC|GO5007_LC|GO5020_LC|GO5083_LC
211986015, 134.457957, 20.028736, 15.694, GO5011_LC|GO5083_LC
211986696, 129.364456, 20.039963, 15.567, GO5006_LC|GO5083_LC
211986729, 129.360303, 20.040419, 14.838, GO5007_LC|GO5083_LC|GO5011_LC
211993383, 130.958542, 20.145567, 15.27, GO5083_LC
211994203, 130.958464, 20.15955, 12.131, GO5007_LC|GO5029_LC|GO5033_LC|GO5060_LC|GO5083_LC
211996329, 132.242252, 20.193749, 15.292, GO5006_LC|GO5083_LC|GO5011_LC
211997008, 132.245652, 20.204441, 15.042, GO5007_LC|GO5011_LC|GO5083_LC
212001507, 123.377007, 20.279071, 11.895, GO5007_LC|GO5029_LC|GO5052_LC|GO5104_LC|GO5060_LC|GO5083_LC
212005512, 126.978288, 20.346737, 12.98, GO5007_LC|GO5029_LC|GO5060_LC|GO5083_LC
212006344, 126.476311, 20.359569, 12.466, GO5006_LC|GO5020_LC|GO5106_LC|GO5083_LC
212006673, 126.474777, 20.364943, 14.409, GO5020_LC|GO5083_LC|GO5097_LC
212010108, 124.525282, 20.422056, 15.101, GO5006_LC|GO5011_LC|GO5083_LC
212010313, 130.629674, 20.425761, 15.65, GO5083_LC
212012534, 133.455511, 20.461379, 14.256, GO5006_LC|GO5020_LC|GO5060_LC|GO5083_LC|GO5064_LC
212012682, 133.45418, 20.463806, 14.256, GO5007_LC|GO5060_LC|GO5083_LC
212013243, 133.717105, 20.473819, 13.736, GO5007_LC|GO5083_LC
212016355, 132.32343, 20.526308, 14.784, GO5007_LC|GO5083_LC
212016569, 132.326226, 20.529899, 13.448, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
212021516, 135.786015, 20.61213, 14.54, GO5020_LC|GO5083_LC|GO5006_LC
212026577, 132.099962, 20.696475, 8.777, GO5007_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5072_LC|GO5083_LC
212032728, 125.161843, 20.799846, 15.136, GO5083_LC
212038855, 127.834122, 20.904025, 13.018, GO5007_LC|GO5060_LC|GO5083_LC
212075723, 126.463456, 21.560683, 13.631, GO5007_LC|GO5020_LC|GO5060_LC|GO5083_LC
212090115, 128.201972, 21.829079, 12.032, GO5007_LC|GO5020_LC|GO5029_LC|GO5033_LC|GO5106_LC|GO5060_LC|GO5083_LC
212120283, 132.811931, 22.421972, 15.733, GO5006_LC|GO5083_LC
212150572, 134.399617, 23.043907, 10.589, GO5007_LC|GO5029_LC|GO5033_LC|GO5104_LC|GO5060_LC|GO5083_LC
212150698, 134.391951, 23.04705, 15.617, GO5083_LC
212152325, 131.55645, 23.083641, 12.336, GO5007_LC|GO5029_LC|GO5033_LC|GO5060_LC|GO5083_LC
212160810, 131.283808, 23.271938, 15.067, GO5007_LC|GO5083_LC
212168163, 126.366995, 23.443201, 14.547, GO5020_LC|GO5083_LC
212168267, 126.436046, 23.445654, 14.179, GO5046_LC|GO5060_LC|GO5083_LC