# Summary of K2 Program GO4074

Title: An asteroseismic study with K2 of solar-like oscillators in four open clusters

PI: Basu, Sarbani (Yale University)
CoIs: 

K2 fields 4 and 5 offer us the unprecedented opportunity to study four very interesting open clusters: Pleiades, Hyades, M44 and M67. We propose to do an asteroseismic study of stars in these clusters using solar-type oscillators.
 While all four clusters have been well studied, most depend on isochrone fitting to determine cluster properties. The properties therefore depend on the assumed distance to the cluster and the extinction too. Asteroseismic studies will allow us to determine properties of the cluster that do not depend on the distances and are only indirectly dependent on the extinction.  Since these stars in each cluster should have a very small spread of ages and metallicities, an ensemble study of these stars will also allow us to test different aspects of the theory of stellar structure and evolution.
 The targets of our study are predominantly main-sequence and subgiant stars. Consequently, all our targets need to be observed in the short cadence.  The proposal team covers all the expertise needed: time series analysis, peak-bagging to determine frequencies, asteroseismic analyses of the frequencies, expertise on rotation and stellar activities which might make interpretation difficult as well as abundance analyses needed for the complete analysis of the asteroseismic data.

# Targets requested by this program that have been observed (31)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
210444167, 65.394979, 14.409788, 6.545, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4033_LC|GO4074_LC|GO4024_LC
210455478, 63.606878, 14.625035, 8.57, GO4074_SC|GO4018_LC|GO4032_LC|GO4060_LC|GO4067_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4064_LC|GO4012_LC|GO4072_LC|GO4104_LC|GO4024_LC
210499243, 63.942852, 15.400696, 6.264, GO4074_SC|GO4018_LC|GO4057_LC|GO4032_LC|GO4023_LC|GO4048_LC|GO4033_LC|GO4074_LC|GO4086_LC|GO4024_LC
210517342, 61.567198, 15.698118, 8.395, GO4074_SC|GO4018_LC|GO4032_LC|GO4067_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4072_LC|GO4104_LC|GO4024_LC
210675409, 66.448161, 18.017272, 8.774, GO4074_SC|GO4018_LC|GO4032_LC|GO4023_LC|GO4060_LC|GO4067_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4072_LC|GO4104_LC|GO4024_LC
210703831, 65.384451, 18.417581, 8.118, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4033_LC|GO4074_LC|GO4086_LC|GO4024_LC
210758134, 65.05403, 19.233479, 8.318, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4072_LC|GO4104_LC|GO4024_LC
210905362, 55.599987, 21.473494, 9.811, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4072_LC|GO4104_LC|GO4024_LC
210969800, 54.594079, 22.499685, 10.005, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4104_LC|GO4024_LC
211015348, 57.48539, 23.218624, 10.111, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4064_LC|GO4024_LC
211023213, 56.541842, 23.340007, 10.013, GO4074_SC|GO4018_LC|GO4057_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4104_LC|GO4024_LC
211029232, 57.143783, 23.434788, 10.212, GO4074_SC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4104_LC|GO4024_LC
211033155, 56.667685, 23.49774, 11.867, GO4074_SC|GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4074_LC|GO4091_LC|GO4106_LC|GO4104_LC|GO4037_LC|GO4024_LC
211037886, 63.634651, 23.574944, 9.046, GO4074_SC|GO4018_LC|GO4032_LC|GO4067_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4095_LC|GO4012_LC|GO4072_LC|GO4104_LC|GO4024_LC
211038389, 56.723929, 23.583556, 10.387, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4104_LC|GO4024_LC
211041683, 57.070427, 23.636785, 10.029, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4024_LC
211049709, 62.150884, 23.768613, 10.273, GO4074_SC|GO4020_LC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4095_LC|GO4104_LC|GO4024_LC
211056809, 55.99501, 23.88273, 9.653, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4104_LC|GO4024_LC
211060621, 56.968856, 23.94124, 9.828, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4024_LC
211067419, 57.109027, 24.048372, 9.963, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4104_LC|GO4035_LC|GO4024_LC
211078009, 56.435057, 24.2203, 10.429, GO4074_SC|GO4020_LC|GO4018_LC|GO4057_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4104_LC|GO4024_LC
211091768, 56.235002, 24.432601, 10.31, GO4074_SC|GO4018_LC|GO4057_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4104_LC|GO4024_LC
211100565, 56.594455, 24.570141, 10.34, GO4074_SC|GO4018_LC|GO4057_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4064_LC|GO4104_LC|GO4024_LC|GO4082_LC
211104312, 57.389272, 24.629785, 9.658, GO4074_SC|GO4020_LC|GO4074_LC|GO4104_LC
211114317, 56.083695, 24.796175, 10.556, GO4032_SC|GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4090_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4104_LC|GO4024_LC|GO4082_LC
211114329, 56.728825, 24.796353, 10.477, GO4074_SC|GO4018_LC|GO4032_LC|GO4060_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4104_LC|GO4024_LC
211115638, 56.169805, 24.818538, 9.847, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4064_LC|GO4012_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
211133821, 56.613949, 25.135532, 10.411, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4029_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4091_LC|GO4064_LC|GO4104_LC|GO4024_LC|GO4082_LC
211138217, 57.070315, 25.215127, 9.166, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4086_LC|GO4064_LC|GO4012_LC|GO4024_LC
211147023, 57.573633, 25.379574, 9.542, GO4074_SC|GO4018_LC|GO4032_LC|GO4048_LC|GO4033_LC|GO4007_LC|GO4074_LC|GO4012_LC|GO4104_LC|GO4024_LC