# TESS Program G03060 Title: Why Do Some Am Stars Pulsate? Characterizing Variability For Am Stars Having Detailed Spectroscopic Abundances PI: Guzik, Joyce - New Mexico Consortium & Los Alamos National Laboratory Type: SMALL Summary: Metallic-line A (Am) stars show abundance anomalies produced by diffusive settling and radiative levitation which should reduce the He abundance in the pulsation driving region and inhibit pulsations. Nevertheless, many Am stars show gamma Dor, delta Sct, and higher frequency roAp-star like modes, and some also show magnetic activity. Neither the pulsation driving mechanisms, nor the origin of the magnetic fields or abundance anomalies are well understood. This proposal is a follow-on to our TESS Cycle 2 proposal, for which 2-min cadence data is being taken on Am stars having detailed spectroscopic abundance determinations. For Cycle 3, we propose to extend observations to 49 additional chemically-peculiar stars to provide a definitive set of constraints to address these problems. # Sector 027 targets observed (2 min: 2, 20 s: 0) 1992751647,309.1312,-26.5414,9.55,G03255;G03060 1992945158,311.8337,-26.4152,7.25,G03255;G03060 # Sector 028 targets observed (2 min: 7, 20 s: 0) 137837596,335.5904,-18.2772,9.85,G03060 206464379,331.0413,-21.7799,7.64,G03060 69750857,336.8,-19.4433,8.36,G03251;G03060 1992873233,318.6896,-25.9113,8.31,G03060 29671013,315.4388,-26.8811,6.02,G03060 300272058,321.0626,-25.5613,7.82,G03060 302334615,320.5273,-24.2259,9.16,G03060 # Sector 029 targets observed (2 min: 2, 20 s: 0) 176299362,1.8468,-11.613,8.04,G03255;G03251;G03060 146165482,342.1489,-17.2563,8.13,G03255;G03060 # Sector 030 targets observed (2 min: 3, 20 s: 0) 248946257,20.4519,-1.9971,8.17,G03251;G03060 212982053,9.7901,-3.9927,8.69,G03060 333557388,11.9115,-4.4976,9.03,G03060 # Sector 031 targets observed (2 min: 2, 20 s: 0) 365425158,48.2266,11.1323,7.66,G03252;G03060 416713269,53.1499,9.3732,5.84,G03060 # Sector 032 targets observed (2 min: 5, 20 s: 0) 436723855,73.959,15.0402,5.87,G03060 245794190,67.2096,13.0475,4.86,G03255;G03156;G03252;G03060;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25 245819988,67.6627,15.6917,5.27,G03255;G03060 245911904,69.7887,15.7995,5.0,G03252;G03060 245936817,70.0142,12.1975,5.56,G03060 # Sector 033 targets observed (2 min: 2, 20 s: 0) 155463738,103.6614,13.1774,4.41,G03156;G03251;G03060;G_NONSTANDARDMASK;G_NOPHOTOMETRY;G_SPECIAL_APERTURE_25_25 437984134,94.5453,15.952,8.16,G03060 # Sector 034 targets observed (2 min: 2, 20 s: 0) 286055622,137.9812,5.4686,6.02,G03251;G03060 334411408,122.8191,9.8211,6.17,G03060 # Sector 035 targets observed (2 min: 2, 20 s: 0) 277799104,155.8641,2.2539,8.39,G03060 344859175,150.7216,1.4858,8.34,G03252;G03060 # Sector 036 targets observed (2 min: 3, 20 s: 1) 152803777,181.0013,-10.2961,6.3,G03060 152828580,181.8412,-10.7395,7.89,G03251;G03060 38116680,170.1334,-2.8982,8.87,G03278;G03060;20SECONDTARGET # Sector 037 targets observed (2 min: 4, 20 s: 0) 203359870,204.5399,-19.1888,8.28,G03251;G03060 220100344,209.3592,-22.3148,9.34,G03251;G03060 220103475,209.311,-18.447,9.47,G03060 32181648,203.6008,-20.4584,8.76,G03060 # Sector 038 targets observed (2 min: 7, 20 s: 0) 186695235,233.8356,-29.0507,7.43,G03251;G03060 23441813,236.5531,-28.0616,6.06,G03251;G03252;G03060 23757609,237.559,-29.4227,9.32,G03060 442720907,238.2567,-30.2513,9.16,G03060 322925297,218.6075,-25.2784,9.1,G03060 48324,220.3538,-25.8384,9.35,G03060 70022193,219.1079,-22.7343,9.36,G03251;G03060 # Sector 039 targets observed (2 min: 4, 20 s: 0) 191625825,252.8351,-30.081,8.0,G03060 204723714,247.6748,-29.4832,7.48,G03251;G03060 97329765,251.7204,-31.4531,7.54,G03060 98316704,252.2964,-30.7809,8.3,G03060