2019MNRAS.487.4695S

Query : 2019MNRAS.487.4695S

2019MNRAS.487.4695S - Mon. Not. R. Astron. Soc., 487, 4695-4710 (2019/August-3)

MOBSTER - II. Identification of rotationally variable A stars observed with TESS in sectors 1-4.

SIKORA J., DAVID-URAZ A., CHOWDHURY S., BOWMAN D.M., WADE G.A., KHALACK V., KOBZAR O., KOCHUKHOV O., NEINER C. and PAUNZEN E.

Abstract (from CDS):

Recently, high-precision optical 2-min cadence light curves obtained with TESS for targets located in the mission's defined first four sectors have been released. The majority of these high-cadence and high-precision measurements currently span ∼28 d, thereby allowing periodic variability occurring on time-scales ≲14 d to potentially be detected. Magnetic chemically peculiar (mCP) A-type stars are well known to exhibit rotationally modulated photometric variability that is produced by inhomogeneous chemical abundance distributions in their atmospheres. While mCP stars typically exhibit rotation periods that are significantly longer than those of non-mCP stars, both populations exhibit typical periods ≲10 d; therefore, the early TESS releases are suitable for searching for rotational modulation of the light curves of both mCP and non-mCP stars. We present the results of our search for A-type stars that exhibit variability in their TESS light curves that is consistent with rotational modulation based on the first two data releases obtained from sectors 1 to 4. Our search yielded 134 high-probability candidate rotational variables - 60 of which have not been previously reported. Approximately half of these stars are identified in the literature as Ap (mCP) stars. Comparisons between the subsample of high-probability candidate rotationally variable Ap stars and the subsample of stars that are not identified as Ap reveal that the latter subsample exhibits statistically (i) shorter rotation periods and (ii) significantly lower photometric amplitudes.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: early-type - stars: magnetic field - stars: rotation

VizieR on-line data: <Available at CDS (J/MNRAS/487/4695): table1.dat>

Simbad objects: 134

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Number of rows : 134
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 225119 SB* 00 03 37.0980677520 -28 25 01.690509684   8.07 8.18     ApSi 52 0
2 HD 225264 SB* 00 04 50.8236837768 -29 37 58.940860980   8.28 8.28     A0IV 80 0
3 HD 1860 PM* 00 22 34.1773037760 -61 02 05.417186928   7.32 7.29     A0V 18 0
4 HD 1948 * 00 23 27.6025067424 -53 50 23.400018456   8.25 8.10     A2/3V 17 0
5 HD 2957 a2* 00 32 44.0827348344 -13 29 13.458487488   8.527 8.49     ApCrEu 45 0
6 HD 3885 a2* 00 41 18.3104448120 -19 51 45.840287520   9.70 9.80     ApSi 39 0
7 * ksi Phe a2* 00 41 46.3972997520 -56 30 04.738422240   5.90 5.70     A3VpSrCr_Ksn 137 0
8 V* BC Cet a2* 00 57 32.5147526784 -10 28 32.790510984   7.59 7.63     ApSi 50 0
9 HD 5823 a2* 00 59 39.2890094040 -11 56 01.275803196   10.21 9.98     ApSrEu(Cr) 17 0
10 HD 6208 * 01 02 30.2135334384 -48 12 03.960320616   9.47 9.38     A0V 18 0
11 HD 6783 Ro* 01 05 31.3085270352 -77 35 04.749438588   7.89 7.94     ApSi 40 0
12 V* AP Scl a2* 01 05 55.6980950160 -26 43 44.007202704   8.60 8.40     A2Vp 121 0
13 HD 7454 SB* 01 13 56.2013070168 -46 26 29.620228272   9.70 9.46     A5IV 19 0
14 V* VV Scl EB* 01 16 06.8199004056 -34 08 55.745106432   8.59 8.37     ApSrCrEu 56 0
15 HD 8700 * 01 22 59.7154703136 -73 35 01.997948400   9.60 9.55     ApSi 24 0
16 HD 8783 a2* 01 24 00.4281100128 -72 19 27.858040284     7.81     ApSrCrEu 52 0
17 HD 9335 SB* 01 31 47.7522302664 -10 15 26.377336188   7.74 7.47     A5/7III 15 0
18 HD 10081 a2* 01 36 15.0992522760 -68 15 05.376629016   9.62 9.61     ApSr(Eu) 24 0
19 HD 10038 SB* 01 37 18.5920112088 -40 10 38.455531068   8.40 8.14     A2mA5-F0 32 0
20 HD 10653 * 01 43 52.5885120096 -07 28 45.695899524   7.77 7.71     A1IV 15 0
21 V* BM Hyi a2* 01 44 32.9704165392 -61 01 07.339971828   6.71 6.79     ApSi 44 0
22 HD 11090 * 01 46 35.1250758792 -67 28 06.552616008   11.05 10.78     ApSr 14 0
23 HD 11346 * 01 47 55.3684296672 -74 04 53.320760004   10.18 9.90     ApSrEuCr 13 0
24 HD 11620 EB* 01 50 24.3129199632 -73 46 13.284923376   8.77 8.54     A4III 24 0
25 HD 12671 * 02 02 35.0073280464 -52 31 57.351760284   8.78 8.48     A8III 22 0
26 HD 13467 * 02 11 43.4165146488 +03 27 09.763146792   6.83 6.66     A2IV 19 0
27 * mu. For * 02 12 54.4699976208 -30 43 25.773757068   5.243 5.260   5.26 A0V 86 0
28 HD 15144 a2* 02 26 00.3479612520 -15 20 28.495226652 6.06 5.97 5.83 5.71 5.67 A3VpSrCrEu 185 0
29 HD 16145 a2* 02 35 04.2033589392 -17 17 22.334930808   7.75 7.64     ApCrEuSr 29 0
30 HD 16504 Pu* 02 35 21.6967090320 -68 09 39.952812384   9.00 9.04     ApSi 24 0
31 HD 17450 * 02 45 45.4028120616 -56 15 59.307903576   8.92 8.85     A0IV/V 12 0
32 BD+07 442 ** 02 53 09.2180016240 +07 42 20.870456724   9.86 9.43     A7IV 7 0
33 HD 18796 * 02 58 57.0562634712 -57 46 11.576768268   8.92 8.78     A1V 13 0
34 HD 19398 * 03 03 42.3267645672 -64 49 21.676776204   9.09 8.78     A9III/IV 18 0
35 HD 19228 * 03 05 45.6114380832 +06 31 15.069345096   9.41 9.35     A0 7 0
36 HD 19782 * 03 05 47.3803145760 -72 12 47.597840712   9.73 9.51     A1IV/V 9 0
37 HD 19695 * 03 06 56.8664447160 -63 42 57.589810668   9.72 9.41     A9V 6 0
38 HD 20434 * 03 11 31.6999519320 -73 26 15.641182176   9.66 9.47     A3V 10 0
39 HD 20505 a2* 03 15 03.1823813400 -59 11 36.054414636   9.90 9.82     ApCrSr 12 0
40 HD 20880 * 03 16 08.0442591552 -73 32 56.337092952   8.15 7.95     ApSr(EuCr) 16 0
41 HD 21360 * 03 24 36.2020781304 -51 03 45.573534684   6.51 6.53     A0V 16 0
42 HD 21799 * 03 30 44.4910083432 -01 59 46.335226236   9.69 9.28     ApSrCrEu 11 0
43 HD 22378 Pe* 03 36 02.6746936584 -02 21 42.827601852   9.28 9.33     B8VSi 14 0
44 V* CT Hyi a2* 03 45 23.7356758848 -71 39 29.274503652   6.137 6.255     ApSi 59 0
45 HD 24825 * 03 55 15.5399249952 -38 45 33.282650268   6.77 6.81     ApCrEu(Sr) 24 0
46 * tau09 Eri a2* 03 59 55.4837679360 -24 00 58.377195468 4.11 4.52 4.66 4.64 4.77 ApSi 172 0
47 HD 26726 a2* 04 12 46.6381745712 -24 47 48.555909384   10.14 9.85     ApSr 14 0
48 HD 27211 * 04 15 18.5069682288 -52 09 49.294200600   9.47 9.44     ApSrCrEu 13 0
49 HD 27463 a2* 04 16 20.9736650 -60 56 54.520969   6.444 6.366     ApEuCr(Sr) 60 0
50 HD 27342 EB* 04 17 14.7416253504 -38 50 39.008822784   8.92 8.82     A2/3V 16 0
51 HD 27997 SB* 04 20 00.0605768112 -68 42 02.762864712   8.25 8.04     A2mA5-A9 23 0
52 HD 27952 * 04 21 23.9570794536 -57 32 30.112198116   9.74 9.39     A4mA7-A9 14 0
53 HD 28299 * 04 25 46.4824198320 -44 51 15.492242592   7.44 7.58     ApSi 24 0
54 HD 28430 * 04 27 22.5239719440 -40 11 49.923765384   8.42 8.20     ApEuCrSr 19 0
55 HD 30374 a2* 04 39 01.5645464016 -75 06 10.160708832   10.11 10.05     ApSrEuCr 22 0
56 HD 30296 * 04 42 09.7990528704 -62 23 06.079159248   9.03 8.72     A9V 13 0
57 HD 31230 * 04 44 00.9979148328 -78 01 17.558469948   8.66 8.55     A1V 15 0
58 HD 30335 * 04 44 30.8050085808 -44 25 06.838412448   9.82 9.67     A4IVSr 14 0
59 HD 30609 * 04 45 26.7305637144 -59 48 46.700704188   8.93 8.78     A2IV/V 4 0
60 V* SY Pic a2* 04 48 38.5184339256 -49 10 11.844118056   9.16 8.85     ApSrCrEu 54 0
61 HD 31973 * 04 57 49.6687899096 -44 37 45.553291356   9.59 9.40     ApSrCrEu 10 0
62 HD 35361 * 05 15 51.1241299536 -75 06 11.095176240   10.17 9.87     ApCrEu 11 0
63 V* TT Pic a2* 05 16 37.8202440768 -45 54 49.444218684   6.92 7.01     ApSi 40 0
64 HD 34870 SB* 05 17 16.9597923528 -55 34 07.714756416   9.92 9.78     A2V 13 0
65 HD 35402 * 05 20 28.2030783033 -60 46 47.447665050   7.18 7.09     A3V 20 0
66 HD 38471 * 05 43 26.6718841296 -49 50 32.612897976   7.46 7.59     ApSi 22 0
67 HD 38719 * 05 44 20.1168246792 -56 54 57.815287488   7.57 7.50     ApCrSrEu 28 0
68 HD 40277 * 05 51 26.3291677848 -70 28 45.809430600   8.49 8.33     ApSrCr(Eu)pec 35 0
69 HD 39979 * 05 51 31.0262045157 -63 31 52.442321123   8.15 7.94     A6IV 19 0
70 HD 41613 * 05 55 50.7380474136 -77 50 43.863367380   10.00 9.67     ApEuCr 16 0
71 HD 43226 Ce* 06 08 29.2831427928 -71 07 11.885081484   9.18 8.94     ApSr(Eu) 24 0
72 HD 44532 ** 06 17 34.0817675393 -64 36 09.705419428   8.90 8.80 9.484   A2V 7 0
73 HD 54558 * 07 03 10.2323393184 -70 32 29.846575176   7.85 7.79     A1V 15 0
74 V* V386 Car a2* 07 04 18.3094021056 -56 44 58.928100288   5.13 5.17     ApSi 120 0
75 HD 54399 a2* 07 04 38.7355434312 -61 50 38.190497244   9.97 9.72     ApSr(CrEu) 18 0
76 HD 56981 * 07 12 41.0982289896 -72 00 10.819886832   9.98 9.59     ApSr 12 0
77 CD-67 516 * 07 17 16.4925956712 -67 53 47.763335688   9.42 9.19     ~ 6 0
78 HD 57642 Er* 07 18 30.8084786688 -59 44 07.711024020   8.83 8.52     A8IV/V 24 0
79 V* V389 Car a2* 07 21 41.0894124288 -61 57 05.082209676   6.83 6.91     ApSi 42 0
80 V* V388 Car a2* 07 21 51.4372227120 -55 46 15.933953712   7.92 7.92     ApSi 35 0
81 V* V409 Car a2* 07 30 56.9886639144 -57 59 28.238685684   9.13 8.89     ApSr(Eu) 132 0
82 HD 61968 * 07 37 53.5994718096 -62 18 18.499150908   9.36 9.20     A3V 11 0
83 HD 63087 * 07 42 57.4853013528 -63 42 07.224778728   9.69 9.41     A7IV 13 0
84 HD 63204 a2* 07 43 36.9592254720 -63 23 57.069272220   8.27 8.31     ApSi 19 0
85 HD 63728 a2* 07 46 38.4117107664 -61 43 54.280595856   9.39 9.36     ApEuCr 29 0
86 HD 64369 a2* 07 50 03.9310894128 -60 40 01.544664864   8.80 8.84     ApSi 27 0
87 HD 66082 * 07 54 39.1242250704 -75 07 43.960859976   9.529 9.562 9.811   A0/1V 8 0
88 V* V607 Car a2* 07 56 22.6795854768 -61 17 02.136961464   9.365 9.340     ApSi 54 0
89 HD 66195 * 07 56 46.9122700944 -70 42 58.878826416   8.76 8.65     ApSrCrEu 22 0
90 HD 66318 * 07 59 27.4731907320 -60 47 47.144978988   9.69 9.56   9.555 A2:IV:pSiSrCr 99 0
91 V* WY Vol a2* 08 07 51.2904872016 -69 53 57.338577312   7.93 7.99     ApSi 31 0
92 HD 69784 * 08 12 22.6122380928 -73 10 55.608832380   8.73 8.65     A0V 14 0
93 HD 69862 a2* 08 15 29.3098391592 -61 51 09.443817900   10.35 10.11     ApSrEuCr 14 0
94 HD 70623 SB* 08 18 59.7203240472 -65 16 41.320777476   9.08 8.75     A8IV 12 0
95 HD 71006 * 08 20 28.0852067112 -68 09 38.658703212   9.21 9.24     ApSi 10 0
96 HD 72634 a2* 08 29 42.9352173072 -67 08 23.261586108   7.29 7.27     ApCrEuSr 28 0
97 HD 73373 * 08 32 44.6020153872 -71 47 43.590515856   8.22 8.13     A0V 13 0
98 HD 74388 EB* 08 39 14.4374906592 -69 16 26.100000948   6.85 6.97     ApSi 21 0
99 HD 198966 * 20 54 42.3060821136 -26 00 57.330983052   9.61 9.25     A9V 9 0
100 HD 199917 * 21 01 03.2987240880 -29 43 43.174833528   7.23 7.08     A2III/IV 16 0
101 HD 200299 SB* 21 03 17.8201869624 -25 04 27.003795564   7.92 7.69     A3III 13 0
102 V* CI Mic a2* 21 05 34.8826296120 -35 42 07.666501248   9.25 9.07     ApSrEuCr 23 0
103 HD 201801 * 21 13 47.7565327200 -50 55 27.165801180   9.18 8.85     A9V 21 0
104 * tet Ind ** 21 19 51.9894566760 -53 26 57.933870576   4.641 4.483 5.82   A5IV-V 91 0
105 * tet01 Mic a2* 21 20 45.6194367384 -40 48 34.620146136 4.77 4.84 4.82 4.73 4.69 ApCrEuSr 142 0
106 * tet02 Mic ** 21 24 24.8179591 -41 00 24.103339   5.725 5.775     ApSi 58 0
107 V* BI Mic a2* 21 26 03.8683509936 -29 55 48.145296468   9.10 8.81     ApSrEu 87 0
108 HD 203898 * 21 26 29.1659289744 -44 35 52.117382364   9.57 9.25     A9V 7 0
109 HD 204367 * 21 28 41.1925287768 -25 38 38.596969140   7.91 7.83     A(pSrEuCr) 16 0
110 HD 206497 ** 21 42 59.5429389024 -20 24 43.145617500   8.84 8.64     A3V 8 0
111 V* BC Ind a2* 21 46 37.9166070984 -67 35 46.856471892   7.13 7.20     ApSi 50 0
112 V* CE Ind a2* 21 51 43.4734294656 -73 10 10.347587400   9.13 8.83     ApEuSrCr 17 0
113 V* BD Ind a2* 21 56 56.6970333720 -61 50 46.320856080   7.42 7.19     ApSrEuCr 66 0
114 HD 208489 * 21 58 00.7149987816 -53 32 57.554121300   8.73 8.71     A0V 15 0
115 HD 208759 * 22 00 54.6053978976 -64 57 41.301416880   10.18 9.98     ApSrEuCr 15 0
116 HD 209133 * 22 01 40.7700918288 -24 51 56.358053856   8.66 8.34     A9V 21 0
117 HD 209605 a2* 22 05 14.2340191200 -26 50 56.014433988   9.87 9.58     ApSrEuCr 15 0
118 HD 209468 Er* 22 06 22.8587088648 -68 44 29.120945064   7.58 7.54     A1V 22 0
119 V* BK Gru a2* 22 24 37.6103122272 -39 07 37.475207724   7.00 6.84     ApSrEuCr 66 0
120 HD 213230 * 22 30 58.8732593016 -48 18 56.775258540   7.91 7.69     A5/6V 13 0
121 HD 214582 Pu* 22 40 28.8885803736 -57 50 23.162465580   9.70 9.48     F0VkA2.5mA2.5_lB 11 0
122 HD 214985 * 22 42 21.8006769264 -20 37 32.318409972   10.76 11.12     ApSi 14 0
123 HD 215559 Pu* 22 46 42.9145618632 -44 17 00.846515148   10.019 9.693     A7V 12 0
124 * eps Gru SB* 22 48 33.2980615128 -51 19 00.713323272   3.556 3.466     A2IVn 137 0
125 HD 215983 * 22 49 28.7371464288 -32 33 34.819762284   9.82 9.66     ApSrEuCr 16 0
126 * gam PsA * 22 52 31.5301572432 -32 52 31.657761516 4.28 4.46 4.51     A0VpSrCrEu 74 0
127 HD 216485 * 22 54 02.6214563616 -49 32 11.743190340   9.00 8.93     A1V 10 0
128 HD 217448 * 23 01 00.7431987888 -22 24 10.386093132   10.00 9.57     A8V+(G/K) 8 0
129 HD 217684 ** 23 02 37.7951057995 -18 32 30.138649921           A2/3V 16 0
130 V* CN Tuc a2* 23 09 27.7123518144 -63 39 12.107929716   9.62 9.38     ApEuSr 48 0
131 HD 220455 * 23 24 01.5808269744 -27 16 51.047151816   7.75 7.77 8.72   A0V 18 0
132 V* CG Tuc a2* 23 29 00.9815552856 -63 06 38.359594512   5.51 5.68     ApSi 99 0
133 HD 222638 * 23 42 33.9703705848 -57 28 40.880024040   8.71 8.63     ApSrEuCr 20 0
134 * i03 Aqr Pe* 23 51 21.3383366673 -18 54 32.990905266 4.62 5.04 5.18     A0VpSiSr 207 0

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