2016A&A...594A..41I


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.27CET23:37:17

2016A&A...594A..41I - Astronomy and Astrophysics, volume 594A, 41-41 (2016/10-1)

Glimpses of stellar surfaces. I. Spot evolution and differential rotation of the planet host star Kepler-210.

IOANNIDIS P. and SCHMITT J.H.M.M.

Abstract (from CDS):

We use high accuracy photometric data obtained with the Kepler satellite to monitor the activity modulations of the Kepler-210 planet host star over a time span of more than four years. Following the phenomenology of the star's light curve in combination with a five spot model, we identify six different so-called spot seasons. A characteristic, which is common in the majority of the seasons, is the persistent appearance of spots in a specific range of longitudes on the stellar surface. The most prominent period of the observed activity modulations is different for each season and appears to evolve following a specific pattern, resembling the changes in the sunspot periods during the solar magnetic cycle. Under the hypothesis that the star exhibits solar-like differential rotation, we suggest differential rotation values of Kepler-210 that are similar to or smaller than that of the Sun. Finally, we estimate spot life times between ∼60 days and ∼90 days, taking into consideration the evolution of the total covered stellar surface computed from our model.

Abstract Copyright: © ESO, 2016

Journal keyword(s): stars: activity - starspots - stars: rotation

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 CoRoT-2 * 19 27 06.4944821296 +01 23 01.357597206   13.422 12.568 12.204 11.49 G7V+K9V 214 2
2 Kepler-210 Ro* 19 30 00.8101566734 +43 04 59.362696026           M0V 47 1
3 Kepler-210b Pl 19 30 00.8101566734 +43 04 59.362696026           ~ 19 0

    Equat.    Gal    SGal    Ecl

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2020.11.27-23:37:17

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