# Summary of K2 Program GO5021

Title: Probing the Planetary Population of High-Mass Stars

PI: Cochran, William D. (The University of Texas at Austin)
CoIs: Shporer, Avi; Johnson, Marshall C

Stars with masses greater than ~1.5 times that of the Sun are typically avoided in planet surveys, as these stars' rapid rotation and paucity of spectral lines make follow-up radial velocity observations difficult. Instead, Doppler tomography (where we spectroscopically resolve the distortions in the spectral line shape during the transit of a planet around a rapidly rotating star) and analysis of the orbital phase curve (where we detect the combined effects of Doppler beaming and ellipsoidal variations of the host star and reflected light from the planet) can be used to validate planet candidates around these stars. We propose to use K2 to search for transiting planet candidates around a sample of main sequence A and early F stars in order to expand the sample of known planets around these stars and enable statistical investigations of this largely unexplored population; we will then validate the resulting planet candidates using Doppler tomography and phase curve analysis. Doppler tomography also allows the measurement of the (mis)alignment between the stellar spin and the planetary orbital plane, an important parameter for investigating planetary migration processes. This investigation will not only discover and characterize new planets around massive stars but also provide insight into the planetary population, planet formation, and planet migration around these stars. It will thus address two of the science goals of NASA's Astrophysics program, namely, "Explore the origin and evolution of the galaxies, stars, and planets that make up our universe" and "Discover and study planets around other stars."

# Targets requested by this program that have been observed (86)
EPIC ID, RA (J2000) [deg], Dec (J2000) [deg], magnitude, Investigation IDs
211304154, 131.847201, 9.93233, 12.711, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC
211326009, 131.077357, 10.371065, 10.758, GO5021_LC|GO5033_LC
211326087, 126.678777, 10.372724, 11.341, GO5007_LC|GO5021_LC
211349593, 129.229693, 10.806237, 10.761, GO5007_LC|GO5021_LC|GO5033_LC
211351144, 127.178889, 10.835307, 9.571, GO5021_LC
211354585, 128.839125, 10.8973, 10.964, GO5021_LC|GO5033_LC
211358306, 127.508612, 10.96106, 11.511, GO5007_LC|GO5021_LC|GO5033_LC
211385811, 131.93724, 11.416724, 10.778, GO5021_LC|GO5033_LC
211386895, 126.092821, 11.433424, 11.801, GO5007_LC|GO5021_LC
211389052, 130.192049, 11.467751, 10.564, GO5021_LC|GO5033_LC|GO5096_LC
211390221, 129.149973, 11.486844, 9.428, GO5021_LC|GO5033_LC
211431042, 128.107519, 12.109804, 11.005, GO5021_LC|GO5033_LC
211436265, 126.204559, 12.189957, 11.567, GO5021_LC|GO5104_LC
211478023, 130.119863, 12.821725, 9.328, GO5021_LC|GO5033_LC
211480847, 127.096957, 12.862516, 11.814, GO5021_LC
211483359, 124.699337, 12.898138, 11.285, GO5021_LC
211485900, 130.051878, 12.935071, 11.897, GO5007_LC|GO5021_LC|GO5033_LC|GO5104_LC
211488900, 126.96839, 12.978844, 10.721, GO5021_LC
211492667, 124.342217, 13.033823, 12.484, GO5021_LC
211497399, 128.211667, 13.102989, 11.69, GO5021_LC
211506513, 135.305919, 13.231415, 12.03, GO5007_LC|GO5021_LC|GO5033_LC
211513786, 127.763862, 13.333482, 11.983, GO5021_LC|GO5033_LC
211514479, 130.083152, 13.34298, 10.821, GO5021_LC|GO5033_LC
211523171, 127.730711, 13.466164, 12.056, GO5007_LC|GO5021_LC|GO5033_LC
211535724, 123.979752, 13.641886, 12.161, GO5007_LC|GO5021_LC
211536941, 123.689972, 13.659305, 11.375, GO5007_LC|GO5021_LC|GO5029_LC
211537138, 126.539796, 13.662155, 12.003, GO5007_LC|GO5021_LC
211544213, 136.24202, 13.760876, 9.412, GO5021_LC
211547853, 130.840834, 13.813153, 10.843, GO5007_LC|GO5021_LC|GO5033_LC
211550648, 125.242302, 13.850463, 10.537, GO5007_LC|GO5021_LC
211555248, 127.594483, 13.914701, 11.367, GO5007_LC|GO5021_LC|GO5033_LC|GO5104_LC
211566937, 124.776666, 14.081147, 11.518, GO5021_LC
211569097, 127.702066, 14.111802, 10.06, GO5021_LC
211581468, 124.783906, 14.284811, 11.665, GO5021_LC
211587705, 127.709012, 14.373949, 9.535, GO5007_LC|GO5021_LC|GO5033_LC
211592851, 126.369362, 14.442857, 9.732, GO5007_LC|GO5021_LC
211600949, 135.567859, 14.551625, 12.088, GO5007_LC|GO5021_LC|GO5033_LC
211606027, 127.767552, 14.621177, 10.08, GO5021_LC
211629834, 127.283701, 14.954459, 11.699, GO5021_LC
211636994, 128.021978, 15.055692, 11.568, GO5021_LC|GO5033_LC|GO5104_LC
211640119, 126.980018, 15.099, 8.996, GO5021_LC
211681365, 132.935122, 15.664954, 11.727, GO5021_LC|GO5033_LC
211692281, 128.349984, 15.811946, 10.266, GO5021_LC|GO5033_LC
211728117, 130.766266, 16.298241, 11.719, GO5021_LC
211729742, 124.103657, 16.321417, 10.438, GO5021_LC
211742901, 131.953838, 16.508227, 9.932, GO5021_LC|GO5033_LC
211759541, 124.787122, 16.742064, 12.754, GO5007_LC|GO5021_LC
211760296, 126.348602, 16.752128, 11.925, GO5007_LC|GO5021_LC
211779946, 132.63871, 17.032015, 8.627, GO5021_LC|GO5033_LC
211793574, 132.785947, 17.225405, 11.558, GO5021_LC|GO5033_LC|GO5104_LC
211816477, 126.522033, 17.54912, 10.448, GO5007_LC|GO5021_LC
211819373, 129.921634, 17.591433, 10.39, GO5021_LC|GO5033_LC
211823930, 132.094203, 17.655951, 8.946, GO5021_LC|GO5033_LC
211845879, 123.284016, 17.961539, 9.194, GO5021_LC
211891898, 133.663671, 18.607397, 10.691, GO5021_LC|GO5033_LC
211896911, 123.97535, 18.681696, 11.672, GO5021_LC
211910450, 129.200014, 18.882806, 8.976, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5045_LC|GO5048_LC|GO5057_LC|GO5086_LC
211914223, 130.860815, 18.937768, 11.842, GO5021_LC|GO5033_LC
211914580, 129.998209, 18.943263, 10.071, GO5021_LC|GO5033_LC
211922096, 137.35316, 19.055824, 12.788, GO5021_LC|GO5033_LC
211931309, 130.137336, 19.194326, 8.929, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5040_LC|GO5048_LC|GO5086_LC
211937198, 125.954175, 19.28238, 10.961, GO5021_LC
211937323, 125.198612, 19.284215, 9.258, GO5021_LC
211940932, 130.708048, 19.339224, 12.3, GO5021_LC|GO5033_LC
211960331, 124.382153, 19.6298, 11.381, GO5007_LC|GO5021_LC
211963425, 133.658655, 19.677509, 10.521, GO5007_LC|GO5021_LC|GO5033_LC
211972282, 126.126612, 19.813074, 12.394, GO5021_LC
211979345, 130.307389, 19.921995, 8.337, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5048_LC|GO5086_LC
211982003, 131.358818, 19.963506, 11.709, GO5007_LC|GO5021_LC|GO5033_LC|GO5104_LC
211983602, 129.657758, 19.989753, 8.616, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5040_LC|GO5048_LC|GO5086_LC
211983916, 130.063954, 19.994291, 8.743, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5045_LC|GO5048_LC|GO5086_LC
211985076, 129.390897, 20.013674, 8.633, GO5018_LC|GO5021_LC|GO5024_LC|GO5033_LC|GO5035_LC|GO5048_LC|GO5086_LC
212008291, 135.164864, 20.39189, 10.826, GO5007_LC|GO5021_LC|GO5033_LC
212032055, 130.642162, 20.78929, 12.304, GO5021_LC|GO5033_LC
212070326, 133.658843, 21.461675, 11.957, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC|GO5104_LC
212092446, 128.288888, 21.875895, 9.012, GO5021_LC|GO5033_LC|GO5045_LC
212095687, 132.614816, 21.937191, 12.113, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC
212112291, 127.624855, 22.263894, 12.422, GO5021_LC|GO5033_LC
212114592, 132.630831, 22.309535, 11.557, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC
212119288, 130.567265, 22.402868, 11.286, GO5007_LC|GO5021_LC|GO5033_LC
212154902, 133.147844, 23.140584, 11.877, GO5007_LC|GO5021_LC|GO5033_LC
212155124, 126.859135, 23.145463, 9.73, GO5021_LC
212158629, 127.070736, 23.223802, 12.309, GO5007_LC|GO5021_LC|GO5029_LC
212169226, 128.005283, 23.468423, 11.302, GO5007_LC|GO5021_LC|GO5033_LC
212169652, 134.500517, 23.478811, 11.604, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC|GO5096_LC
212173173, 130.836776, 23.563073, 12.032, GO5007_LC|GO5021_LC|GO5029_LC|GO5033_LC