2021RAA....21..114Y


Query : 2021RAA....21..114Y

2021RAA....21..114Y - Research in Astron. and astroph., 21, 114-114 (2021/May-0)

The stellar system HIP 101227: is it a binary, a triple or a quadruple system?

YOUSEF Z.T., ANNUAR A., HUSSEIN A.M., AL-NAIMIY H., AL-WARDAT M., HAMID N.S.A. and TALAFHA M.F.

Abstract (from CDS):

In this paper, we present the analysis of the stellar system HIP 101227 to determine the actual number of components in the system, and their properties. We use dynamical modeling and complex spectrophotometric (involving atmospheric modeling) techniques with recent data, to determine the physical properties and orbital solution for the system, respectively, with better accuracy than past studies. Based on our analysis, we found that the system is more consistent with being a quadruple rather than a binary or a triple system as suggested by previous studies. The total mass of the system determined from our SED analysis is 3.42 ± 0.20 M☉, which is distributed almost equally between the four stars. The stars are found to be zero-age main sequence stars; i.e., at the last stage of pre-main sequence, with age less than 200 Myr spectral types K0. All four stars have very similar physical characteristics, suggesting that the fragmentation process is the most likely theory for the formation and evolution of the system.

Abstract Copyright: © 2021 National Astronomical Observatories

Journal keyword(s): stars: binaries: close - stars: binaries: visual - stars: individual: HIP 101227

Simbad objects: 2

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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 - 2026
#notes
1 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0V 2787 1
2 BD+33 3930 BY* 20 31 07.76836 +33 32 34.4593   9.21 8.35     G8V 65 0

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