# Summary of K2 Program GO4101

Title: Wide Stellar Binaries in Kepler: Calibrating Gyrochronology Models and Constraining Planetary Properties

PI: West, Andrew A (Boston Univeristy)
CoIs: 

The ability to estimate the age of a star is a crucial step in understanding the evolution of stellar, Galactic and planetary phenomena. One method of stellar age determination, gyrochronology, relies on the color and rotation period of a star; rotation rate offers direct insight into the evolution of stellar angular momentum and decreases with stellar age. Previous studies have found that wide binaries are an ideal sample for constraining gyrochronology models and are particularly useful for age-dating older and low-mass stars (i.e., where empirical methods of age determination are most needed). Using the Ecliptic Plane Input Catalog and the fourth U.S. Naval Observatory CCD Astrograph Catalog, we identified 9786 common proper motion binaries in K2 Fields 4 and 5 and will use long-cadence observations of a subset of these pairs to measure photometric rotation periods and recalibrate the age-rotation relationship. Additionally, given well-determined ages for a sample of binaries with attending planets, we can also extrapolate planetary ages and begin to constrain planet formation and evolution scenarios using an absolute timescale.

# Targets requested by this program that have been observed (57)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
210356639, 61.794809, 12.403232, 13.321, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210366266, 62.516578, 12.652633, 10.764, GO4020_LC|GO4101_LC|GO4104_LC
210401543, 64.024055, 13.503217, 11.886, GO4020_LC|GO4101_LC|GO4104_LC
210408943, 54.820255, 13.670281, 13.247, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210409766, 54.819134, 13.689177, 14.79, GO4060_LC|GO4101_LC
210425963, 57.823431, 14.042497, 12.274, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210479151, 64.980062, 15.055379, 12.724, GO4020_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210489254, 62.664972, 15.228926, 13.01, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210507393, 55.159005, 15.536274, 10.677, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC|GO4052_LC|GO4082_LC
210507827, 60.044275, 15.543292, 14.443, GO4020_LC|GO4060_LC|GO4011_LC|GO4101_LC
210535619, 64.444466, 15.992176, 12.603, GO4020_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210545274, 60.771602, 16.143505, 13.234, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210558578, 52.532048, 16.346867, 10.876, GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC
210559259, 59.475854, 16.357698, 13.699, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210594088, 60.642046, 16.879071, 8.963, GO4020_LC|GO4101_LC|GO4104_LC
210658447, 55.94111, 17.783611, 14.03, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210669534, 59.687516, 17.937295, 13.007, GO4020_LC|GO4007_LC|GO4101_LC
210674696, 65.419115, 18.006855, 12.889, GO4020_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210675159, 65.409594, 18.01374, 12.883, GO4020_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210680151, 55.317939, 18.08406, 11.592, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC
210680508, 55.040917, 18.088595, 12.317, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210698564, 65.096851, 18.342063, 11.574, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC
210719749, 65.02869, 18.650985, 10.527, GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC|GO4082_LC
210721966, 65.100107, 18.684814, 13.578, GO4020_LC|GO4007_LC|GO4101_LC
210736198, 51.283513, 18.898601, 15.551, GO4006_LC|GO4101_LC|GO4022_LC
210743536, 51.896844, 19.009993, 12.058, GO4033_LC|GO4007_LC|GO4101_LC
210743959, 64.479476, 19.016648, 13.371, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210744875, 51.843366, 19.030879, 12.049, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4106_LC|GO4022_LC
210748444, 64.522701, 19.085093, 12.937, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
210748873, 54.618984, 19.091618, 14.528, GO4060_LC|GO4054_LC|GO4101_LC
210750050, 54.654604, 19.109648, 13.932, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210764570, 55.962663, 19.331286, 13.212, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210764876, 51.457943, 19.336032, 13.683, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
210798254, 51.980473, 19.84204, 10.628, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4104_LC
210798903, 51.97271, 19.852032, 13.797, GO4060_LC|GO4007_LC|GO4101_LC
210897435, 56.921472, 21.351345, 12.605, GO4020_LC|GO4101_LC
210906085, 58.065993, 21.484744, 12.43, GO4020_LC|GO4060_LC|GO4101_LC|GO4106_LC
211006411, 64.996617, 23.076568, 12.216, GO4020_LC|GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC
211008133, 63.803416, 23.102826, 15.311, GO4060_LC|GO4083_LC|GO4054_LC|GO4101_LC
211008736, 63.775295, 23.112528, 14.154, GO4020_LC|GO4060_LC|GO4007_LC|GO4083_LC|GO4101_LC
211009722, 52.23129, 23.129269, 15.113, GO4006_LC|GO4101_LC
211021332, 57.601747, 23.310449, 12.662, GO4020_LC|GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4106_LC
211028812, 55.361164, 23.428023, 14.85, GO4020_LC|GO4060_LC|GO4101_LC
211030439, 55.902482, 23.45394, 13.903, GO4020_LC|GO4018_LC|GO4057_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4011_LC|GO4006_LC|GO4054_LC|GO4091_LC|GO4101_LC|GO4024_LC
211054632, 55.832175, 23.849214, 14.495, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
211055134, 55.846889, 23.857128, 14.799, GO4060_LC|GO4101_LC
211055290, 55.830021, 23.859565, 13.275, GO4020_LC|GO4060_LC|GO4007_LC|GO4101_LC
211074151, 56.605809, 24.16014, 14.913, GO4020_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4097_LC|GO4006_LC|GO4054_LC|GO4091_LC|GO4101_LC|GO4024_LC
211076042, 56.566661, 24.189932, 8.666, GO4018_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4086_LC|GO4064_LC|GO4101_LC|GO4035_LC|GO4024_LC
211079719, 57.038164, 24.246389, 12.49, GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4082_LC
211087128, 56.600566, 24.361223, 12.429, GO4020_LC|GO4060_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4101_LC|GO4106_LC
211087985, 56.531347, 24.374378, 14.064, GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4054_LC|GO4091_LC|GO4101_LC|GO4024_LC
211111670, 63.937004, 24.750681, 13.141, GO4020_LC|GO4060_LC|GO4101_LC
211112686, 56.103394, 24.768413, 14.496, GO4039_SC|GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4011_LC|GO4054_LC|GO4039_LC|GO4101_LC|GO4024_LC
211112974, 56.085442, 24.772859, 10.867, GO4032_SC|GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4091_LC|GO4101_LC|GO4104_LC|GO4037_LC|GO4024_LC
211122237, 56.667738, 24.931072, 13.411, GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4091_LC|GO4101_LC|GO4024_LC
211123901, 56.661561, 24.959642, 10.172, GO4074_SC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4064_LC|GO4101_LC|GO4104_LC|GO4024_LC