2016AcA....66..381S


Query : 2016AcA....66..381S

2016AcA....66..381S - Acta Astron., 66, 381-390 (2016/August-0)

Photometric Observations of LO Peg in 2014-2015.

SAVANOV I.S., PUZIN V.I., DMITRIENKO E.S., KARPOV S.V., BESKIN G.M., BIRYUKOV A.V., BONDAR S.F., IVANOV E.A., KATKOVA E.V., OREKHOVA N., PERKOV A.V., SASYUK V.V., ROMANYUK I.I., SEMENKO E.A., KUDRYAVTSEV D., KARMAKAR S., PANDEY J.C., PANDEY S.B., JOSHI S. and MISRA K.

Abstract (from CDS):

We performed new observations of an ultra-fast rotator of the spectral class K- the LO Peg star- in SAO RAS in 2014 and in Zvenigorod Observatory of INASAN in 2015. The light curves were used to build the maps of temperature inhomogeneities on the LO Peg surface in order to determine the longitudes corresponding to the location of active regions. The obtained measurements suggest the ongoing evolution of movements of active regions and probably the cyclic character of such movements. According to our estimations, the area of the star surface covered with spots decreases and by now it reached 14% of the total visible area of its surface. New observations of the star in V filter allowed us to specify LO Peg long-term variability cycles. Based on spectropolarimetric observations of LO Peg the null result for measurements of mean longitudinal component of magnetic field is obtained.

Abstract Copyright: ∼

Journal keyword(s): Stars: activity - starspots - Stars: magnetic field

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
2 * alf02 CVn a2* 12 56 01.6655889007 +38 19 06.155170512 2.44 2.76 2.88 2.98 3.05 A0VpSiEu 707 0
3 V* FK Com PM* 13 30 46.7996390256 +24 13 57.781233768   9.04 8.245   7.204 G4III 384 1
4 * gam Equ a2* 21 10 20.5000721160 +10 07 53.691967776 5.03 4.94 4.68 4.43 4.32 A9VpSrCrEu 564 0
5 BD+22 4409 BY* 21 31 01.7140062576 +23 20 07.374015564   10.240 9.245 8.6 7.965 K3Vke 187 0
6 BD+22 4417 PM* 21 32 25.4481254832 +23 36 54.464860872   9.65 9.04     G0 7 0
7 HD 205143 * 21 32 52.7338105920 +23 30 18.609661044   9.46 8.93     F8 6 0

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