# Summary of K2 Program GO11036

Title: Searching For Planets In Binary Stars

PI: Wang, Ji (California Institute of Technology)
CoIs: Riddle, Reed L; Baranec, Christoph; Law, Nicholas M; Jensen-Clem, Rebecca; Salama, Maissa; Mawet, Dimitri Paul Quentin; Huang, Xu; Duev, Dmitry

Prior to the launch of the Kepler mission, we already knew that there are hundreds of binary stars in its field of view. For these binary stars, we find a striking deficiency of small planets. We propose to observe more known binary stars to confirm the deficiency. We consider only S-type circumstellar planet system, in which a planet orbits one of the binary stars, NOT circumbinary planets (P-type).

Our sample consists of 1208 binary stars, which represents the largest sample of binary stars for planet search. This sample will allow us to study small and large planets in binary stars. The former can be uniquely probed by the K2 mission. We will reduce the measurement uncertainty by a factor of 2-3, which will place better constraints on the occurrence rate of planets in binary stars

Targeting binary stars with no prior information of planet helps to unambiguously address the planet occurrence rate in binary stars. Increasing the sample size helps not only to confirm the deficiency of planets in binary stars but also study the influence of stellar companions on planets with different sizes and orbital separations. Future NASA mission in search of habitable worlds will inevitably encounter with this question: to select binary stars or not, which account for 33% of stars in the solar neighborhood. This proposal will pave the way to solve this question.

# Targets requested by this program that have been observed (67)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
203281988, 253.805647, -26.646044, 10.26, GO11049_LC|GO11071_LC|GO11122_LC|GO11036_LC|GO11019_LC
203282012, 253.805395, -26.645961, 11.607, GO11071_LC|GO11002_LC|GO11036_LC|GO11019_LC
203896658, 253.738214, -24.50827, 8.237, GO11071_LC|GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC|GO11052_LC|GO11902_LC
204227757, 253.370493, -23.163968, 11.081, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
204231196, 254.200145, -23.150342, 6.393, GO11122_LC|GO11002_LC|GO11036_LC|GO11039_LC|GO11019_LC
204510816, 253.66676, -22.043317, 9.217, GO11071_LC|GO11122_LC|GO11036_LC|GO11019_LC
204510921, 253.666901, -22.042927, 9.092, GO11049_LC|GO11071_LC|GO11002_LC|GO11036_LC|GO11050_LC|GO11052_LC|GO11019_LC
204623925, 253.88557, -21.569507, 6.752, GO11122_LC|GO11002_LC|GO11036_LC|GO11019_LC|GO11127_LC
204680129, 252.985028, -21.330622, 9.677, GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC
221875561, 265.327649, -28.332742, 10.637, GO11071_LC|GO11002_LC|GO11036_LC|GO11052_LC
223001881, 268.349952, -26.664816, 9.956, GO11002_LC|GO11036_LC|GO11019_LC
223260213, 266.683841, -26.263463, 10.256, GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC
223532062, 267.919426, -25.817359, 9.989, GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC|GO11052_LC|GO11019_LC
225048843, 264.585096, -23.207986, 9.547, GO11049_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11050_LC|GO11052_LC|GO11019_LC
225199200, 262.527195, -22.951338, 8.863, GO11012_LC|GO11049_LC|GO11071_LC|GO11002_LC|GO11036_LC|GO11050_LC|GO11052_LC|GO11019_LC
226501546, 263.627457, -20.431024, 11.412, GO11071_LC|GO11036_LC|GO11052_LC|GO11019_LC
226501636, 263.627238, -20.430818, 11.11, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
227969244, 263.303039, -16.619545, 9.244, GO11002_LC|GO11036_LC
229409753, 253.491464, -28.952263, 8.515, GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
230742347, 257.710481, -19.567871, 10.294, GO11071_LC|GO11122_LC|GO11036_LC
230742389, 257.710641, -19.567549, 10.294, GO11071_LC|GO11002_LC|GO11036_LC
230822970, 257.062064, -18.781953, 11.095, GO11014_LC|GO11049_LC|GO11123_LC|GO11071_LC|GO11002_LC|GO11024_LC|GO11036_LC
231248891, 256.708281, -23.792309, 9.929, GO11123_LC|GO11122_LC|GO11002_LC|GO11036_LC
231248897, 256.708567, -23.792272, 9.929, GO11123_LC|GO11036_LC
231267979, 256.328425, -23.648275, 10.996, GO11002_LC|GO11036_LC
231380348, 256.821788, -22.714521, 10.78, GO11002_LC|GO11098_LC|GO11036_LC|GO11019_LC
231383045, 257.624973, -22.688826, 10.15, GO11049_LC|GO11071_LC|GO11002_LC|GO11036_LC|GO11050_LC|GO11019_LC
231458648, 257.763432, -29.978557, 9.409, GO11002_LC|GO11036_LC
231605800, 257.913531, -29.392149, 9.864, GO11122_LC|GO11002_LC|GO11036_LC
231865825, 255.54821, -28.326764, 10.111, GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
232145212, 256.751437, -27.091841, 9.246, GO11071_LC|GO11036_LC|GO11052_LC
232145336, 256.751233, -27.091356, 9.246, GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC
232201328, 257.152526, -26.836748, 8.942, GO11122_LC|GO11002_LC|GO11101_LC|GO11056_LC|GO11036_LC|GO11052_LC|GO11127_LC
232230874, 257.903177, -26.702511, 8.078, GO11002_LC|GO11036_LC|GO11052_LC
232334288, 257.385167, -26.207976, 11.558, GO11071_LC|GO11002_LC|GO11036_LC
233404113, 259.252412, -17.979073, 8.636, GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
233466131, 261.63188, -17.587074, 10.092, GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
233500958, 261.793947, -17.338346, 10.937, GO11071_LC|GO11002_LC|GO11036_LC
233563389, 261.535164, -16.870976, 9.841, GO11071_LC|GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC|GO11019_LC
233920056, 258.775046, -21.928694, 8.661, GO11002_LC|GO11036_LC
233961676, 260.904264, -21.716106, 9.165, GO11071_LC|GO11036_LC|GO11052_LC|GO11019_LC
233961734, 260.904202, -21.715838, 8.66, GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
233997386, 259.993625, -21.53062, 9.408, GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11065_LC|GO11036_LC|GO11039_LC
234151618, 260.51649, -20.741409, 9.127, GO11123_LC|GO11122_LC|GO11002_LC|GO11056_LC|GO11036_LC|GO11052_LC|GO11019_LC
234204668, 259.735704, -20.48546, 11.274, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC
234222973, 260.691414, -20.396947, 10.323, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC
234426374, 259.11943, -19.337108, 8.627, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC
234431291, 258.663487, -19.309249, 9.833, GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC
234441334, 259.709226, -19.25184, 9.267, GO11071_LC|GO11002_LC|GO11036_LC|GO11052_LC
234441378, 259.709408, -19.251602, 9.267, GO11071_LC|GO11122_LC|GO11036_LC|GO11052_LC
234483865, 258.606535, -19.011425, 10.111, GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC
234539589, 260.085353, -18.700745, 10.209, GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC
234634096, 258.930541, -18.180772, 9.071, GO11071_LC|GO11122_LC|GO11036_LC
234634121, 258.930205, -18.180641, 9.071, GO11071_LC|GO11002_LC|GO11036_LC
235057273, 261.71409, -24.385504, 9.351, GO11012_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11065_LC|GO11024_LC|GO11036_LC
235393998, 260.405084, -22.873684, 9.551, GO11071_LC|GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC|GO11052_LC|GO11019_LC
235542983, 258.744357, -22.159159, 12.347, GO11002_LC|GO11036_LC
235595645, 261.807931, -29.942356, 9.595, GO11012_LC|GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC
236406950, 260.227753, -27.344462, 8.274, GO11122_LC|GO11002_LC|GO11024_LC|GO11036_LC|GO11039_LC|GO11052_LC|GO11019_LC
236490904, 258.045563, -27.04236, 6.624, GO11002_LC|GO11036_LC|GO11019_LC
236508082, 258.051045, -26.980252, 9.135, GO11123_LC|GO11002_LC|GO11024_LC|GO11036_LC
238277236, 262.331424, -16.791418, 9.679, GO11071_LC|GO11122_LC|GO11002_LC|GO11098_LC|GO11024_LC|GO11036_LC|GO11039_LC|GO11052_LC
240261123, 262.887724, -29.967313, 9.404, GO11049_LC|GO11071_LC|GO11122_LC|GO11002_LC|GO11036_LC|GO11052_LC
240651150, 264.072923, -28.571904, 9.626, GO11002_LC|GO11036_LC|GO11052_LC|GO11019_LC
242084843, 263.036156, -30.474636, 9.886, GO11002_LC|GO11036_LC
242088762, 263.074211, -30.460823, 8.817, GO11122_LC|GO11036_LC|GO11052_LC|GO11019_LC
242136287, 262.89916, -30.292855, 8.067, GO11002_LC|GO11036_LC