2002A&A...396..203A


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.26CET00:02:36

2002A&A...396..203A - Astronomy and Astrophysics, volume 396, 203-211 (2002/12-2)

Starspots and active regions on the emission red dwarf star LQ Hydrae.

ALEKSEEV I.Y. and KOZLOVA O.V.

Abstract (from CDS):

The quasi-simultaneous electrophotometric, polarimetric and spectroscopic observations of the single active spotted star LQ Hya are presented. The photometric variability of the star can be described completely by a zonal starspots model. Spotted regions occupy up to 23% of the total stellar surface. The temperature difference between the unspotted photosphere and starspots is about 800K. Starspots are localized at the low and middle latitudes. We find for the first time broad-band linear polarization of the stellar light and its rotational modulation connected to the local magnetic region on the stellar surface. We suspect that there is a spacial connection between plages, magnetic regions and the mostly spotted stellar longitudes.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: chromospheres - stars: magnetic fields - starspots

Simbad objects: 4

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Number of rows : 4

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 G 272-61B Er* 01 39 01.6334059022 -17 57 01.121866655           M6V 796 0
2 HD 82477 PM* 09 31 55.7091290439 -10 22 13.227958057   7.312 6.124     K2III 24 0
3 HD 82508 * 09 32 11.774 -10 50 37.64   8.3 7.7     A(3)V+K0III 23 0
4 V* LQ Hya BY* 09 32 25.5684079124 -11 11 04.687410738 9.316 8.761 7.891 7.288 6.815 K1Vp 407 0

    Equat.    Gal    SGal    Ecl

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2021.01.26-00:02:36

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