# TESS Program G06188

Title: Using TESS To Search For Companions To Several New Pulsating Hot Subdwarf Stars Using Pulse-Timing Analysis

PI: Lopez, Isaac - Iowa State University

Type: SMALL

Summary: Hot subdwarf stars are the exposed helium-fusing cores of giant stars that have experienced a significant episode of mass-loss. Recently, a new class of pulsating hot subdwarf stars has been discovered with pulsation periods around 5 minutes. The exact nature of these stars is still unknown; the main unsolved problem is whether or not these stars harbor helium fusion cores. Here we propose to use TESS 20-second cadence observations to search for binary companions around several of these stars by looking for subtle variations in the arrival times of the pulsations. Because of the short period of the pulsations, the continuous short-cadence TESS observations are particularly well-suited for this study. To confirm binary detections with TESS, we propose to obtain follow-up spectroscopic obser


# Sector 071 targets observed (2 min: 3, 20 s: 0)
673946269,79.9019,16.994,18.54,G06188
155313989,102.9554,16.0574,12.02,G06188
155457780,103.6288,17.164,11.95,G06188

# Sector 072 targets observed (2 min: 3, 20 s: 0)
155313989,102.9554,16.0574,12.02,G06188
155457780,103.6288,17.164,11.95,G06188
333801260,130.7663,16.2982,11.62,G06188

# Sector 073 targets observed (2 min: 5, 20 s: 0)
367083346,100.735,45.9715,16.11,G06188
368835265,80.2808,45.8322,9.45,G06188
238975905,79.0137,37.9159,9.78,G06188
743755468,110.1667,85.4955,16.64,G06188
1271391576,251.8986,81.8242,18.62,G06188

# Sector 074 targets observed (2 min: 8, 20 s: 0)
1271391576,251.8986,81.8242,18.62,G06188
743755468,110.1667,85.4955,16.64,G06188
23174151,274.6722,34.8957,16.09,G06188
169733765,297.6846,37.4,11.05,G06188
1866624401,296.6008,30.2145,17.11,G06188
30789906,289.7398,32.0013,16.76,G06188
395202217,291.9136,30.9803,10.25,G06188
395204823,291.8208,30.4976,17.24,G06188

# Sector 075 targets observed (2 min: 6, 20 s: 1)
341650611,171.0006,54.0918,11.8,G06188
1271391576,251.8986,81.8242,18.62,G06188
169733765,297.6846,37.4,11.05,G06188
1866624401,296.6008,30.2145,17.11,G06188
1958242853,319.7546,35.2077,16.68,G06188
236108710,313.2538,34.7567,15.83,G06188;20SECONDTARGET

# Sector 076 targets observed (2 min: 1, 20 s: 0)
249699428,339.2893,48.9864,11.5,G06188

# Sector 077 targets observed (2 min: 3, 20 s: 0)
1000656229,205.524,28.3178,18.39,G06188
249699428,339.2893,48.9864,11.5,G06188
313566148,345.1317,54.2336,12.81,G06188

# Sector 079 targets observed (2 min: 3, 20 s: 0)
1309031655,251.6309,19.0534,18.46,G06188
1271391576,251.8986,81.8242,18.62,G06188
743755468,110.1667,85.4955,16.64,G06188