2009A&A...506..263F


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST06:57:28

2009A&A...506..263F - Astronomy and Astrophysics, volume 506, 263-268 (2009/10-4)

On the differential rotation of CoRoT-2a.

FROEHLICH H.-E., KUEKER M., HATZES A.P. and STRASSMEIER K.G.

Abstract (from CDS):

We apply a robust spot model to fit the light curve of CoRoT-2a. The spots are assumed to be long-living and each has its own rotation period. A model with three circular spots reproduces the basic features of the longitude-time spot coverage map. One of the spots exhibits a noticeably lower rotational frequency than the other two. From the rotational frequencies of the three dark features we infer a differential rotation of above 0.11rad/d, in rough agreement with theoretical models. Mean field models of angular momentum transport by convection and meridional flow lead to an equatorial rotational frequency that exceeds that of the poles by 0.09 rad/d. The spot decay corresponds to a turbulent magnetic diffusivity of (1.2±0.1)x1013cm2/s.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: individual: CoRoT-2a - stars: interiors - stars: late-type - stars: rotation - starspots

Simbad objects: 2

goto Full paper

goto View the reference in ADS

Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 HD 50773 * 06 54 37.0338198405 -00 27 09.477956333   9.50 9.36     ApSr 19 0
2 CoRoT-2 * 19 27 06.4944821296 +01 23 01.357597206   13.422 12.568 12.204 11.49 G7V+K9V 201 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009A&A...506..263F and select 'bookmark this link' or equivalent in the popup menu


2019.10.18-06:57:28

© Université de Strasbourg/CNRS

    • Contact