2009A&A...506..245M


Query : 2009A&A...506..245M

2009A&A...506..245M - Astronomy and Astrophysics, volume 506, 245-254 (2009/10-4)

Short-lived spots in solar-like stars as observed by CoRoT.

MOSSER B., BAUDIN F., LANZA A.F., HULOT J.C., CATALA C., BAGLIN A. and AUVERGNE M.

Abstract (from CDS):

CoRoT light curves have an unprecedented photometric quality, having simultaneously a high signal-to-noise ratio, a long time span and a nearly continuous duty-cycle. We analyse the light-curves of four bright targets observed in the seismology field and study short-lived small spots in solar-like stars. We present a simple spot modeling by iterative analysis. Its ability to extract relevant parameters is ensured by implementing relaxation steps to avoid convergence to local minima of the sum of the residuals between observations and modeling. The use of Monte-Carlo simulations allows us to estimate the performance of the fits. Our starspot modeling gives a representation of the spots on these stars in agreement with other well tested methods. Within this framework, parameters such as rigid-body rotation and spot lifetimes seem to be precisely determined. Then, the lifetime/rotation period ratios are in the range 0.5-2, and there is clear evidence for differential rotation.

Abstract Copyright:

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

Simbad objects: 6

goto Full paper

goto View the references in ADS

Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 860 0
2 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 1837 1
3 HD 49933 PM* 06 50 49.8309774552 -00 32 27.167495244   6.147 5.771 7.04   F3V 364 2
4 HD 175726 PM* 18 56 37.1723923656 +04 15 54.462836664   7.28 6.71     G0V 107 0
5 HD 181420 PM* 19 20 27.0720449304 -01 18 35.132869692   6.98 6.55     F6V 85 0
6 HD 181906 PM* 19 22 21.3624224688 +00 22 58.628902908   8.11 7.65     F5V 60 0

To bookmark this query, right click on this link: simbad:objects in 2009A&A...506..245M and select 'bookmark this link' or equivalent in the popup menu


2023.01.27-22:05:15

© Université de Strasbourg/CNRS

    • Contact