2017MNRAS.466..738S


Query : 2017MNRAS.466..738S

2017MNRAS.466..738S - Mon. Not. R. Astron. Soc., 466, 738-748 (2017/March-3)

SALT observations of the chromospheric activity of transiting planet hosts: mass-loss and star-planet interactions.

STAAB D., HASWELL C.A., SMITH G.D., FOSSATI L., BARNES J.R., BUSUTTIL R. and JENKINS J.S.

Abstract (from CDS):

We measured the chromospheric activity of the four hot Jupiter hosts WASP-43, WASP-51/HAT-P-30, WASP-72 and WASP-103 to search for anomalous values caused by the close-in companions. The Mount Wilson Ca II H & K S-index was calculated for each star using observations taken with the Robert Stobie Spectrograph at the Southern African Large Telescope. The activity level of WASP-43 is anomalously high relative to its age and falls among the highest values of all known main-sequence stars. We found marginal evidence that the activity of WASP-103 is also higher than expected from the system age. We suggest that for WASP-43 and WASP-103 star-planet interactions (SPI) may enhance the Ca II H & K core emission. The activity levels of WASP-51/HAT-P-30 and WASP-72 are anomalously low, with the latter falling below the basal envelope for both main-sequence and evolved stars. This can be attributed to circumstellar absorption due to planetary mass-loss, though absorption in the interstellar medium may contribute. A quarter of known short-period planet hosts exhibit anomalously low activity levels, including systems with hot Jupiters and low-mass companions. Since SPI can elevate and absorption can suppress the observed chromospheric activity of stars with close-in planets, their Ca II H & K activity levels are an unreliable age indicator. Systems where the activity is depressed by absorption from planetary mass-loss are key targets for examining planet compositions through transmission spectroscopy.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: activity - circumstellar matter - stars: individual: (WASP-43, WASP-51, WASP-72, WASP-103) - stars: individual: (WASP-43, WASP-51, WASP-72, WASP-103)

Simbad objects: 57

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Number of rows : 57
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 WASP-1 V* 00 20 40.0745768856 +31 59 23.954809596   12.06 11.31     F7V 109 1
2 HD 9562 PM* 01 33 42.8357181696 -07 01 31.238801760 6.61 6.40 5.76     G1V 250 0
3 HD 10069 * 01 37 25.0332798696 -45 40 40.374717456   9.74 9.30     F6IV/V 188 1
4 * tau Cet PM* 01 44 04.0831371922 -15 56 14.927607677 4.43 4.22 3.50 2.88 2.41 G8V 1176 1
5 NAME Cetus Field reg 02 05 20 -04 55.0           ~ 27 0
6 HAT-P-29 * 02 12 31.4787454416 +51 46 43.563748620   12.30 11.83 11.82   ~ 27 1
7 HAT-P-38 PM* 02 21 31.9803537360 +32 14 46.093339140   13.34 12.51 12.36   G 17 0
8 HD 16160 PM* 02 36 04.9013368983 +06 53 12.383654295   6.81   5.2   K3V 515 1
9 CD-30 1019 * 02 44 09.6096023424 -30 10 08.563662228   11.454 10.960 10.47 10.428 ~ 29 1
10 NAME G Cloud Cld 03 00 +50.2           ~ 67 0
11 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1808 1
12 Cl Melotte 22 OpC 03 46 24 +24 06.8           ~ 3208 0
13 HD 26913 BY* 04 15 25.7871375264 +06 11 58.751401236 7.790 7.580 6.920 6.554 6.195 G8V 210 0
14 HD 26923 PM* 04 15 28.8004060272 +06 11 12.698572488 6.910 6.860   5.9   G0IV 201 0
15 NAME Auriga reg 04 20 00.0 +38 05 00           ~ 188 0
16 Cl Melotte 25 OpC 04 29 47 +16 56.9           ~ 2860 0
17 NAME LIC Cld 04 41 +31.           ~ 274 0
18 WASP-12 ** 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 272 2
19 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 672 1
20 CoRoT-1 * 06 48 19.1723766840 -03 06 07.710745140     13.6 13.44 12.88 G0V 114 2
21 XO-4 * 07 21 33.1602434760 +58 16 05.109533364   11.15 10.81     ~ 55 1
22 BD+20 1790 BY* 07 23 43.5893479416 +20 24 58.650645816   11.08 10.001 9.43 8.522 K5e 85 0
23 HAT-P-35 * 08 13 00.1784913648 +04 47 13.416267948   12.84 11.59 12.38   ~ 24 1
24 BD+06 1909 * 08 15 47.9802408792 +05 50 12.350816484   10.95 10.35     G0 51 1
25 HAT-P-13 * 08 39 31.8072358440 +47 21 07.273799280   11.15 10.42 10.40   G4 124 2
26 BD+34 1976 V* 09 20 24.7145388600 +33 52 56.696039796   11.21 10.42     G1V 61 1
27 HD 86856 PM* 10 02 28.3492141104 +44 34 42.628744596   10.11   8.4   K0 55 0
28 WASP-43 PM* 10 19 38.0088913464 -09 48 22.605801336   13.4 12.4 12.08 11.10 K7V 115 1
29 WASP-43b Pl 10 19 38.0089444408 -09 48 22.603103969           ~ 292 1
30 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 710 1
31 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1106 0
32 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 943 1
33 HAT-P-12 PM* 13 57 33.4668726399 +43 29 36.601508739   12.6 12.84     K5 70 1
34 HAT-P-44 * 14 12 34.5714083256 +47 00 53.044781616   13.2 13.21 12.83 12.31 ~ 19 1
35 CD-27 10695 * 15 59 50.9491505016 -28 03 42.312819096   11.83 11.59 11.31 10.92 F4 100 1
36 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1235 1
37 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3373 1
38 WASP-103b Pl 16 37 15.5753608801 +07 11 00.119024745           ~ 144 1
39 WASP-103 * 16 37 15.5765824488 +07 11 00.109678740     12.1     F8V 54 1
40 TrES-4 Pl 17 53 13.0490781575 +37 12 42.586106196           ~ 192 2
41 HAT-P-46 * 18 01 46.6085289960 -02 58 15.458098944   12.9 11.94 11.62 11.07 ~ 21 1
42 HAT-P-31 * 18 06 09.0498478464 +26 25 35.989962204   12.02 11.67 11.49   ~ 24 2
43 HAT-P-45 * 18 17 29.5774338144 -03 22 51.737462436   13.7 12.79 12.32 11.68 ~ 14 1
44 Kepler-25 Ro* 19 06 33.2141354736 +39 29 16.358725104   11.32 10.77 10.598   ~ 132 1
45 HD 179949 BY* 19 15 33.2300695008 -24 10 45.671448072   6.772 6.237     F8V 378 1
46 HD 182101 PM* 19 22 48.3509531208 +09 54 47.340798372   6.789 6.346     F6V 117 0
47 BD+48 2893 Ro* 19 24 07.7659706688 +49 02 24.928348272   10.73 10.08     G1V 112 1
48 WASP-48 * 19 24 38.9614451424 +55 28 23.332107108   12.31 11.65 11.61   ~ 40 1
49 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 808 1
50 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1268 1
51 HD 358155 ** 21 01 54.480000 -13 25 59.71008   11.75 10.79 11.12   G4+K3 21 1
52 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1685 1
53 HAT-P-40 * 22 22 03.0875673648 +45 27 26.518064616   12.19 11.34     ~ 22 1
54 * 34 Peg SB* 22 26 37.3705884794 +04 23 37.605589572   6.37 5.81 5.4   F7V 145 0
55 NAME Hyades Cloud Cld ~ ~           ~ 23 0
56 NAME Mic Void ? ~ ~           ~ 4 0
57 NAME Aql Region reg ~ ~           ~ 354 0

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2022.08.10-03:07:14

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