# TESS Program G08020

Title: Understanding The Origin And Evolutionary Context Of Variability In Alpha Cygni Variables

PI: Guzik, Joyce - Los Alamos National Laboratory

Type: SMALL

Summary: This project leverages TESS s photometry to observe 75 Alpha Cygni variables luminous B- and A-type supergiants exhibiting quasi-periodic or aperiodic low-amplitude brightness variations (0.01 0.1 mag) on timescales of days to months. Ground-based observations lack the cadence, precision, and continuity to characterize the variability and detect transient phenomena. Using TESS Cycle 8 s observations for an extended 56-day sector and subsequent overlapping sectors, we will quantify light curve properties including searching for recurrent phenomena such as those reported in the prototype, Deneb. We will use TESS data in conjunction with 1-D evolution and pulsation models to investigate causes of variability and to determine interior properties and evolutionary state of these stars.


# Sector 097 targets observed (2 min: 40, 20 s: 0)
179204401,79.3231,-69.7789,10.35,G08020;G08137
179304683,79.5801,-69.1946,9.37,G08020
179307922,79.6603,-69.5387,10.32,G08020;G08137
179508685,80.3136,-69.4449,11.37,G08020;G08137
179508746,80.3434,-69.4522,10.63,G08020;G08137
179639066,80.7528,-67.1895,11.59,G08020;G08017;G08158
231743280,78.0712,-67.324,11.33,G08020;G08017
276787778,83.2546,-69.3748,11.56,G08020;G08137
276864037,83.5936,-67.0232,9.77,G08020;G08137
276864600,83.5769,-67.3038,11.15,G08020;G08017;G08137
276869010,83.5416,-68.9868,10.3,G08020
277024372,84.0188,-69.4023,10.36,G08020;G08017
277100123,83.9008,-67.3397,12.0,G08020;G08017;G08137
277173617,84.1576,-69.4927,10.96,G08020
277297046,84.6118,-69.7642,10.74,G08020;G08137
279952228,81.9837,-67.3462,10.0,G08020;G08137
294977451,72.3294,-69.4318,11.71,G08020
30106140,73.4304,-68.7148,11.04,G08020;G08017;G08137
30759304,75.4383,-70.5978,11.61,G08020;G08137
30764640,75.9412,-70.1993,11.33,G08020
30848631,75.8068,-68.5598,11.79,G08020;G08137
31017680,76.5669,-70.4932,11.53,G08020
373593938,80.928,-66.6525,11.66,G08020
373598194,81.0573,-66.4247,12.44,G08020;G08017
373682056,81.284,-69.8954,11.14,G08020;G08017;G08137
373839861,81.6454,-68.8687,9.09,G08020;G08137
373843852,81.5634,-67.5,10.77,G08020;G08017
389328766,85.7053,-69.5478,11.57,G08020;G08137
389564948,86.2187,-67.3331,12.27,G08020;G08017;G08137
389570429,86.4943,-67.8392,11.5,G08020;G08017;G08137
391809072,82.5653,-67.5394,11.24,G08020;G08017;G08137
40347835,77.4108,-69.3104,12.23,G08020
404768475,84.7224,-69.0336,11.03,G08020;G08137
404796860,84.6771,-69.3859,11.52,G08020;G08017;G08137
40515236,77.6142,-69.1532,11.44,G08020;G08137
40795195,78.6316,-69.2315,9.77,G08020;G08017;G08137
425083634,83.1205,-67.532,12.14,G08020;G08137
425084139,83.0033,-67.3397,12.19,G08020;G08017;G08137
425084965,83.0798,-66.9979,11.51,G08020;G08017;G08137
55758135,75.3062,-65.811,11.28,G08020;G08017

# Sector 098 targets observed (2 min: 33, 20 s: 1)
427451176,84.0534,-1.202,2.69,G08020
231308237,78.6345,-8.2017,0.71,G08020;20SECONDTARGET
66651575,86.9391,-9.6696,8.28,G08020
373593938,80.928,-66.6525,11.66,G08020
373598194,81.0573,-66.4247,12.44,G08020;G08017
55758135,75.3062,-65.811,11.28,G08020;G08017
179204401,79.3231,-69.7789,10.35,G08020;G08137
179304683,79.5801,-69.1946,9.37,G08020
179307922,79.6603,-69.5387,10.32,G08020;G08137
179508685,80.3136,-69.4449,11.37,G08020;G08137
179508746,80.3434,-69.4522,10.63,G08020;G08137
276787778,83.2546,-69.3748,11.56,G08020;G08137
276869010,83.5416,-68.9868,10.3,G08020
277024372,84.0188,-69.4023,10.36,G08020;G08017
277173617,84.1576,-69.4927,10.96,G08020
277297046,84.6118,-69.7642,10.74,G08020;G08137
294977451,72.3294,-69.4318,11.71,G08020
30106140,73.4304,-68.7148,11.04,G08020;G08017;G08137
30759304,75.4383,-70.5978,11.61,G08020;G08137
30764640,75.9412,-70.1993,11.33,G08020
30848631,75.8068,-68.5598,11.79,G08020;G08137
31017680,76.5669,-70.4932,11.53,G08020
373682056,81.284,-69.8954,11.14,G08020;G08017;G08137
373839861,81.6454,-68.8687,9.09,G08020;G08137
389328766,85.7053,-69.5478,11.57,G08020;G08137
389564948,86.2187,-67.3331,12.27,G08020;G08017;G08137
389570429,86.4943,-67.8392,11.5,G08020;G08017;G08137
40347835,77.4108,-69.3104,12.23,G08020
404768475,84.7224,-69.0336,11.03,G08020;G08137
404796860,84.6771,-69.3859,11.52,G08020;G08017;G08137
40515236,77.6142,-69.1532,11.44,G08020;G08137
40795195,78.6316,-69.2315,9.77,G08020;G08017;G08137
425083634,83.1205,-67.532,12.14,G08020;G08137

# Sector 099 targets observed (2 min: 28, 20 s: 7)
1084245,130.9265,-25.1197,12.29,G08020
375353623,152.085,-43.1944,12.03,G08020
290678431,173.9263,-61.2879,6.04,G08020
304894154,165.6925,-59.741,6.56,G08020
317046099,172.313,-63.5539,4.83,G08020
317937518,172.8126,-61.2785,5.68,G08020;20SECONDTARGET
451959707,172.9532,-59.5156,4.56,G08020;20SECONDTARGET
457766442,158.1991,-58.6667,5.61,G08020;20SECONDTARGET
457803940,158.3557,-58.1901,5.62,G08020;20SECONDTARGET
458076250,158.9249,-58.1929,6.64,G08020
458231448,159.3627,-58.7333,4.92,G08020
458533793,160.221,-57.9356,5.61,G08020;20SECONDTARGET
458704469,160.6689,-59.2157,5.16,G08020
459133606,161.8294,-57.3254,6.81,G08020
459537285,162.9841,-58.4154,6.3,G08020
459637433,163.1284,-57.2404,5.07,G08020;20SECONDTARGET
460279488,157.2052,-60.8947,7.32,G08020
465384125,163.3128,-60.8148,7.34,G08020
466911307,167.1416,-61.9472,4.91,G08020;G08158
467058752,167.5345,-60.1523,11.95,G08020
467274664,168.15,-60.3176,4.01,G08020;20SECONDTARGET
208101888,207.8915,-58.5395,8.41,G08020
436284921,193.4067,-60.3571,6.76,G08020
311729566,181.4578,-69.5731,7.29,G08020
325794885,187.3795,-66.8605,6.98,G08020
382515892,183.5704,-64.4085,6.26,G08020
443528451,199.5285,-63.6871,7.1,G08020
400700797,220.0731,-64.8335,8.71,G08020