2022MNRAS.510.5348Z

Query : 2022MNRAS.510.5348Z

2022MNRAS.510.5348Z - Mon. Not. R. Astron. Soc., 510, 5348-5361 (2022/March-2)

Dynamo activity of the K dwarf KOI-883 from transit photometry mapping.

ZALESKI S.M., VALIO A., CARTER B.D. and MARSDEN S.C.

Abstract (from CDS):

The Kepler mission target star KOI-883 is notable in being a low-mass K2V dwarf with moderately fast 8.99-d rotation and hosting a single transiting hot Jupiter in a 2.69-d orbit. This combination thus presents a particular opportunity to study star-spot activity by using the many deep planetary transits apparent in the light curve to map the stellar surface. The data have been analysed using spot modelling and temporal mapping methods we have used for other Kepler host stars, and a search for flares was conducted. Our results indicate a low-latitude region of the photosphere marked by distinct areas of individual or grouped star-spots with moderately high solar-type differential rotation of 0.102 ± 0.011 rad d–1, but with just two major flares observed across 400 d. These results imply a rotational shear significantly greater than that of our slower rotating Sun. The observed flares are more energetic than typical solar flares, but similar to those of other magnetically active cool dwarfs.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): stars: flare - stars: low-mass - stars: rotation - stars: solar-type - star-spots

Simbad objects: 22

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Number of rows : 22
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* VY Ari RS* 02 48 43.7287198695 +31 06 54.592461256   7.72   6.4   G9 241 0
2 V* IN Vir RS* 13 24 24.1561749744 -02 18 54.937707948   10.33 9.131   7.900 K2III 73 0
3 V* OT Ser PM* 15 21 52.9325510712 +20 58 39.910874376 12.662 11.522 10.003 8.993 7.843 M1.0V 170 0
4 Kepler-411 Er* 19 10 25.3469947368 +49 31 23.712634632   13.70 12.55 12.26   K3V 129 0
5 Kepler-411b Pl 19 10 25.3469947368 +49 31 23.712634632           ~ 59 0
6 Kepler-411c Pl 19 10 25.3469947368 +49 31 23.712634632           ~ 47 0
7 Kepler-63 Er* 19 16 54.2861367672 +49 32 53.451062520   12.449 11.733 11.701   G2V 145 1
8 Kepler-45 Ro* 19 31 29.4966491088 +41 03 51.356401092     16.88 16.63   M1V 120 1
9 Kepler-71 Ro* 19 39 27.7155573840 +46 17 08.941351920       15.35   G8V 78 1
10 WASP-67 * 19 42 58.5218345280 -19 56 58.521259680   12.90 12.54     K0V 39 1
11 KOI-883 BY* 19 46 43.9374116784 +42 58 04.356492672           K2V 49 0
12 KOI-883.01 Pl? 19 46 43.9374116784 +42 58 04.356492672           ~ 23 0
13 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 359 1
14 Kepler-17 Ro* 19 53 34.8643397568 +47 48 54.049530564   14.6   13.6   G5V 175 1
15 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 991 1
16 Qatar 1 PM* 20 13 31.6172746704 +65 09 43.492226796   13.90 12.84 12.65 11.71 ~ 71 1
17 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 357 1
18 WASP-6 * 23 12 37.7368282608 -22 40 26.273805024   12.90 11.91     G8V 112 1
19 WASP-52b Pl 23 13 58.7576098848 +08 45 40.572305352           ~ 155 1
20 WASP-52 * 23 13 58.7576098848 +08 45 40.572305352   12.9 12.0 12.03   K2V 106 1
21 WASP-59 * 23 18 29.5474746528 +24 53 21.438581712   14.01 12.78 12.37   K5V 30 1
22 HD 224085 RS* 23 55 04.0520383542 +28 38 01.245426862 8.88 8.20   6.9   K2+IVeFe-1 756 0

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