2021MNRAS.506.5328K

Query : 2021MNRAS.506.5328K

2021MNRAS.506.5328K - Mon. Not. R. Astron. Soc., 506, 5328-5344 (2021/October-1)

TESS survey of rotational and pulsational variability of mercury-manganese stars.

KOCHUKHOV O., KHALACK V., KOBZAR O., NEINER C., PAUNZEN E., LABADIE-BARTZ J. and DAVID-URAZ A.

Abstract (from CDS):

Mercury-manganese (HgMn) stars are late-B upper main sequence chemically peculiar stars distinguished by large overabundances of heavy elements, slow rotation, and frequent membership in close binary systems. These stars lack strong magnetic fields typical of magnetic Bp stars but occasionally exhibit non-uniform surface distributions of chemical elements. The physical origin and the extent of this spot formation phenomenon remain unknown. Here, we use 2-min cadence light curves of 64 HgMn stars observed by the Transiting Exoplanet Survey Satellite (TESS) during the first 2 yr of its operation to investigate the incidence of rotational modulation and pulsations among HgMn stars. We found rotational variability with amplitudes of 0.1-3 mmag in 84 per cent of the targets, indicating ubiquitous presence of star-spots on HgMn-star surfaces. Rotational period measurements reveal six fast-rotating stars with periods below 1.2 d, including one ultra-fast rotator (HD 14228) with a 0.34-d period. We also identify several HgMn stars showing multiperiodic g-mode pulsations, tidally induced variation and eclipses in binary systems.

Abstract Copyright: © The Author(s) 2021. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): binaries: close - stars: chemically peculiar - stars: early-type - stars: oscillations - stars: rotation - starspots

Simbad objects: 79

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Number of rows : 79
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 V* V567 Cas a2* 00 05 06.1508805192 +61 18 50.292327564   5.710 5.791     B6III 64 0
2 * alf And a2* 00 08 23.25988 +29 05 25.5520 1.48 1.95 2.06 2.09 2.19 B8IV-VHgMn 479 1
3 HD 1009 Pu* 00 14 42.7102819992 +64 33 58.128697980   8.54 8.38     B8pMn 25 0
4 HD 1279 * 00 17 09.0440331312 +47 56 50.661966660 5.36 5.764 5.852     B7III 73 0
5 * 23 Cas SB* 00 47 46.0538925192 +74 50 51.251241300   5.338 5.413     B8III 83 0
6 HD 5408 ** 00 56 46.97166 +60 21 46.2192   5.500 5.566     B7Vn+B9VHgMn+A1V 133 1
7 * 2 Per SB* 01 52 09.3723086736 +50 47 34.054111608 5.38 5.623 5.689     B9pHgMn 99 0
8 * phi Phe SB* 01 54 22.0319152104 -42 29 48.942141036   5.055 5.109     A3V 120 0
9 HD 11921 * 01 58 38.8629616368 +56 04 18.198295320   9.46 9.42     A0 5 0
10 * phi Eri PM* 02 16 30.5860916570 -51 30 43.794586801 3.06 3.45 3.57 3.64 3.75 B8IV 161 0
11 * 11 Per * 02 43 02.8380253536 +55 06 21.666195864 5.13 5.639 5.753     B8IV 82 0
12 * tet Hyi ** 03 02 15.4488409848 -71 54 08.839047780   5.365 5.499     B8III/IV 102 0
13 HD 22128 SB* 03 33 37.9173806232 -07 24 54.019826100   7.97 7.56     kA5hF2mF3(V)Eu 52 0
14 * 20 Tau PM* 03 45 49.6081548365 +24 22 03.877565838 3.40 3.80 3.87 3.85 3.90 B7III 451 1
15 * ups04 Eri SB* 04 17 53.6624004496 -33 47 54.052408258 3.07 3.44 3.56 3.57 3.68 B8V+B9.5V? 168 0
16 HD 28217 ** 04 27 28.7694788712 +11 12 44.209409004 5.58 5.902 5.870     B8IV 79 0
17 HD 28929 * 04 34 37.9927914408 +28 57 40.141956564   5.82 5.9     B8/9 88 0
18 * 93 Tau Pu* 04 40 03.4199311320 +12 11 51.406702908   5.319 5.445     B8IV 83 0
19 HD 30963 * 04 51 39.2470961616 -10 17 25.211906700   7.17 7.23     B9III 26 0
20 HD 31373 * 04 55 50.1515237736 +15 02 24.942409800   5.701 5.776     B9V 72 0
21 * 66 Eri a2* 05 06 45.6527881872 -04 39 18.601025148 4.89 5.06 5.12     B9V 157 1
22 * mu. Lep a2* 05 12 55.9029641016 -16 12 19.668599100 2.78 3.18 3.29 3.30 3.42 B9IV:HgMn 294 1
23 * 17 Aur SB* 05 18 18.8960529504 +33 46 02.516925540   6.102 6.144     B9V+B9.5V 308 0
24 HD 34923 Em* 05 22 22.1388710136 +34 31 27.528427992   9.85 9.73     A1V 7 0
25 HD 36881 SB* 05 35 13.2466726656 +10 14 24.278794332 5.66 5.734 5.638     B9IIIp 70 0
26 HD 37437 Pe* 05 40 03.5663593656 +31 53 57.807479472   8.13 8.13     B9 17 0
27 HD 37519 V* 05 40 35.9073397656 +31 21 29.518273512 5.88 6.09 6.04 5.93 5.88 B9.5III-IVp:(Hg?) 67 0
28 HD 37886 * 05 41 32.0065124640 -02 58 26.602064364   8.956 8.979 9.67 9.51 B8III 37 0
29 * 129 Tau * 05 46 45.4968290688 +15 49 20.982467280   5.913 5.994     B8IIIpHg(Mn) 80 0
30 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A0mA1Va 1610 0
31 * 33 Gem Pe* 06 49 49.8362378064 +16 12 10.382708016 5.24 5.72 5.87     B9III 158 0
32 V* V680 Mon EB* 06 59 30.7167318552 +09 18 59.694186996   10.05 10.11     B8 20 0
33 * gam CMa * 07 03 45.4934693195 -15 37 59.833212992 3.52 4.00 4.12 4.13 4.23 B8II 193 0
34 CPD-60 944B Pu* 07 56 46.2620797099 -60 48 58.296559706   8.77 8.76     B8III 53 0
35 HD 65950 V* 07 57 45.2194757688 -60 55 35.265618408 6.56 6.86 6.87     B8III 104 0
36 HD 66409 Ro* 07 59 57.8067802465 -60 44 48.469843598 8.08 8.38 8.37     B8IV/V 64 0
37 HD 69028 SB* 08 16 25.8822070704 +35 33 02.521171764   7.96 7.99     B9 23 0
38 * kap02 Vol * 08 20 00.5275254216 -71 30 19.361671236   5.496 5.608     B9/A0IV 77 0
39 CD-71 464 * 08 20 04.5379925904 -71 29 46.936479120   8.81 7.90     ~ 4 0
40 * 14 Hya a2* 08 49 21.7258429872 -03 26 34.891438308 4.87 5.22 5.31     B8IIIpHgMn 154 0
41 * c Car PM* 08 55 02.8480985300 -60 38 40.594250640 3.28 3.74 3.80     B8II-III 83 0
42 * nu. Cnc SB* 09 02 44.2677118128 +24 27 10.392222600   5.404 5.447     A0III 205 0
43 HD 80078 * 09 14 37.3580978544 -64 09 12.880110600   8.25 8.20     BpHgMn 11 0
44 HD 82984B * 09 33 44.4154142928 -49 00 19.838608092   6.10 6.21     ~ 7 0
45 HD 87240 * 10 01 44.0901709680 -59 51 00.176879232   9.69 9.91     ApSi 46 0
46 V* ET UMa a2* 10 24 07.8468791760 +65 33 59.121373140   4.889 4.930     A1:VpSiSrHg 284 0
47 HD 93549 SB* 10 46 29.5881441504 -64 15 47.653678296 4.69 5.136 5.229     B6-7V 93 0
48 HD 99803 Pu* 11 28 35.0787698304 -42 40 27.140015424   5.104 5.136     B9V 53 0
49 HIP 56001 * 11 28 35.3162772816 -42 40 39.926670240   7.84 7.68     ~ 24 0
50 HD 101189 PM* 11 38 07.2695736768 -61 49 35.512404852 4.96 5.13 5.14     ApHgMn 85 0
51 HD 101391 * 11 40 27.4302004704 +57 58 13.458822204   6.242 6.335     B9VpHgMn 54 0
52 * gam Crv PM* 12 15 48.37081 -17 32 30.9496 2.12 2.47 2.58 2.62 2.71 B8III 249 1
53 * l Cen ** 12 39 52.5291353564 -39 59 14.286324017 4.16 4.56 4.64 4.66 4.75 B8II/III 122 0
54 HD 133833 * 15 08 43.2448848192 -53 48 10.021448088   8.26 8.23     B9IV 6 0
55 * chi Lup SB* 15 50 57.5453432166 -33 37 37.728345509 3.77 3.909 3.946     B9III 318 0
56 * iot CrB SB* 16 01 26.5649192496 +29 51 03.819408336   4.921 4.971     A0IIIspHgMnEu 275 0
57 * ups Her PM* 16 02 47.8978183032 +46 02 12.133917132 4.33 4.616 4.709     B9.5III 248 0
58 * phi Her a2* 16 08 46.1762180496 +44 56 05.661355344 3.92 4.20 4.27 4.27 4.36 B9VspHgMn 304 1
59 * tet Nor PM* 16 15 15.3177605472 -47 22 19.271560980   5.007 5.124     B8V 51 0
60 HD 156127 Pe* 17 12 22.8711955320 +57 13 24.382039440   8.25 8.29     B9 21 0
61 HD 156678 Pe* 17 15 48.4139719080 +56 04 39.246208248   8.62 8.59     A0 14 0
62 * 38 Dra Pe* 18 16 58.7416416552 +68 44 29.241767436   6.707 6.785     A0VpHgMnZr 68 0
63 V* V4050 Sgr a2* 18 22 53.0754352224 -36 40 10.400061108   5.20 5.34     B7Ib/II 168 0
64 HD 171301 * 18 32 49.9577254800 +30 33 15.151676292 4.93 5.381 5.468     B8V 64 0
65 HD 172044 SB* 18 36 37.3442332272 +33 28 08.537976300 4.8 5.301 5.410     B8IIpHgMn 156 0
66 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
67 HD 172728 PM* 18 37 33.5174187456 +62 31 35.673279564 5.530 5.690 5.740     A0V 82 0
68 * c Dra SB* 18 42 37.9596158552 +55 32 22.007313973   4.94 5.02     A0IIIpHgMn 196 0
69 * 112 Her SB* 18 52 16.4279808528 +21 25 30.512193132 4.83 5.304 5.393     B9pHg 207 0
70 HD 179709B * 19 12 23.0783175264 +30 20 59.182864368   9.09 9.08     ~ 6 0
71 KOI-6124 EB* 19 49 36.0925401744 +40 08 58.193357820   11.55 11.34     A2III 31 0
72 HD 193772 Pu* 20 21 10.6695232440 +27 31 01.751729124   8.61 8.63     B9.5pSr 22 0
73 HD 198174 SB* 20 49 17.6130920568 -25 46 52.479584364   5.766 5.849     B8II 53 0
74 HD 202033 Pe* 21 12 31.1624265816 +32 01 49.844850888   8.42 8.44     B9 13 0
75 HD 212093 Pe* 22 20 26.4299125176 +55 41 03.277094748 7.95 8.23 8.28     B9 24 0
76 HD 216831 Pu* 22 55 44.5079270976 +36 21 05.025021984   5.665 5.725     B7III 89 0
77 HD 219485 * 23 14 37.1050796664 +74 13 52.577578380 5.850 5.870 5.890     A0V 57 0
78 * 13 And a2* 23 27 07.4001167376 +42 54 43.235672544   5.726 5.736     B9III 66 0
79 * bet Scl PM* 23 32 58.2607029954 -37 49 05.825575113 3.92 4.28 4.37 4.37 4.44 B9.5IIIpHgMnSi 194 0

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