2001A&A...374.1049K


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET09:27:05

2001A&A...374.1049K - Astronomy and Astrophysics, volume 374, 1049-1055 (2001/8-2)

Study of FK Comae Berenices. III. Photometry for the years 1993-2001.

KORHONEN H., BERDYUGINA S.V., TUOMINEN I., ANDERSEN M.I., PIIRONEN J., STRASSMEIER K.G., GRANKIN K.N., KAASALAINEN S., KARTTUNEN H., MEL'NIKOV S.Y., SHEVCHENKO V.S., TRISOGLIO M. and VIRTANEN J.

Abstract (from CDS):

We present 8 years of previously unpublished photometric observations of FK Com together with the determination of the stability of the primary comparison star HD 117567. The observations have been carried out between 1993 and 2001 at four different observatories and they consist of 5157 data points in total: U(903), B(994), V(1643), R(166), Ic(573), b(461) and y(417). We also analyse this new data together with the previously published photometric observations. The V magnitude shows variations with dominant periods of about 3, 6, 12, 14 and 31 years. The short-term light curve variations appear to be caused by rearrangement of approximately constant amount of cool spots. From the values for different colours obtained during the brightest season observed, corresponding to the supposedly unspotted surface, the spectral type of FK Com is determined to be G7 III.

Abstract Copyright:

Journal keyword(s): stars: individual: FK Com - stars: individual: HD 117567 - stars: starspots - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/374/1049): table2a.dat table2b.dat table2c.dat table2d.dat table2e.dat>

Simbad objects: 6

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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 - 2021
#notes
1 HD 22468 RS* 03 36 47.2911034958 +00 35 15.938962144 7.09 6.63   5.4   K2:Vnk 1132 0
2 * sig Gem RS* 07 43 18.7269793 +28 53 00.642191 6.38 5.41 4.29 3.37 2.79 K1IIIe 450 0
3 V* FK Com Ro* 13 30 46.7993742986 +24 13 57.786184235   9.04 8.245   7.204 G4III 352 1
4 HD 117567 * 13 30 52.2102597150 +24 14 15.415103714 8.000 8.050 7.620     F2 54 0
5 HD 117876 PM* 13 32 48.2136252807 +24 20 48.279125064   7.09 6.10 5.5   G8II-III 117 0
6 HD 224085 RS* 23 55 04.0516465022 +28 38 01.248194500 8.88 8.20   6.9   K2+IVeFe-1 690 0

    Equat.    Gal    SGal    Ecl

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2021.03.01-09:27:06

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