2011A&A...526A..29H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:52:13

2011A&A...526A..29H - Astronomy and Astrophysics, volume 526A, 29-29 (2011/2-1)

Orbital and physical parameters of eclipsing binaries from the All-Sky Automated Survey catalogue. II. Two spotted M < 1 M systems at different evolutionary stages.

HELMINIAK K.G. and KONACKI M.

Abstract (from CDS):

We present the results of our detailed spectroscopic and photometric analysis of two previously unknown <1M detached eclipsing binaries: ASAS J045304-0700.4 and ASAS J082552-1622.8. With the HIgh Resolution Echelle Spectrometer (HIRES) on the Keck-I telescope, we obtained spectra of both objects covering large fractions of orbits of the systems. We also obtained V and I band photometry with the 1.0-m Elizabeth telescope of the South African Astronomical Observatory (SAAO). The orbital and physical parameters of the systems were derived with the PHOEBE and JKTEBOP codes. We investigated the evolutionary status of both binaries with several sets of widely-used isochrones. Our modelling indicates that (1) ASAS J045304-0700.4 is an old, metal-poor, active system with component masses of M1=0.8338±0.0036M, M2=0.8280±0.0040M and radii of R1=0.848±0.005R and R2=0.833±0.005R, which places it at the end of the Main Sequence evolution - a stage rarely observed for this type of stars. (2) ASAS J082552-1622.8 is a metal-rich, active binary with component masses of M1=0.7029±0.0045M, M2=0.6872±0.0049M and radii of R1=0.694 +0.007–0.011R and R2=0.699 +0.011–0.014R. Both systems show significant out-of-eclipse variations, probably owing to large, cold spots. We also investigated the influence of a third light in the second system.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - binaries: spectroscopic - stars: fundamental parameters - stars: individual: ASAS J045304-0700.4 - stars: late-type - stars: individual: ASAS J082552-1622.8

VizieR on-line data: <Available at CDS (J/A+A/526/A29): asas04_i.dat asas04_v.dat asas08_i.dat asas08_v.dat>

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl* NGC 104 WSB V69 EB* 00 22 52.951 -72 03 40.68           ~ 21 0
2 LP 349-48 PM* 00 35 34.7743792031 +27 08 41.312948375   16.3   14.1   ~ 3 0
3 ASAS J045304-0700.4 EB* 04 53 04.4276013349 -07 00 23.505395476   11.99 11.13   10.284 K2V+K4/M4V 17 0
4 V* HS Aur Al* 06 51 18.4767847402 +47 40 24.176583816   10.85 10.05     G5 79 0
5 V* YY Gem BY* 07 34 37.4475372002 +31 52 10.181030942 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 817 0
6 BD-15 2429 Al* 08 25 51.6054049425 -16 22 47.397127759   11.45 10.29 9.73 9.36 K7V+M0/2:V 34 0
7 V* CU Cnc Er* 08 31 37.5740891049 +19 23 39.398696822   12.83 11.809 11.592   M5Ve 196 0
8 [MLF2014] 337529 RR* 13 26 17.2623400187 -47 23 17.199881154 16.915 16.721 16.578 16.566 16.364 ~ 20 0
9 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2997 0
10 2MASS J13272171-4723331 Al* 13 27 21.71 -47 23 33.2 17.654 17.884 17.262 16.778 16.370 ~ 36 0
11 LP 133-373 EB* 14 04 08.8831591084 +50 20 38.639643937   16.3   15.2   ~ 18 0
12 V* GU Boo EB* 15 21 54.8242649848 +33 56 09.067728168     13.11     M0/M1.5 85 0
13 V* CM Dra BY* 16 34 20.3299130309 +57 09 44.365524588   14.50 12.87 10.85 9.26 M4.5V 403 0
14 [LPC2009] 21480 RG* 17 40 40.32 -53 41 25.3   16.68 16.103     ~ 6 0
15 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1799 1
16 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
17 BD+34 4217 Al* 20 58 13.4533595470 +35 10 29.664154462           G9.5Ve+K3Ve 250 0
18 BD-22 5866 Al* 22 14 38.3613804926 -21 41 53.282077032   11.72 10.428 10.137 8.606 M0Ve 32 1
19 V* RW Lac Al* 22 44 57.1032069864 +49 39 27.511213337   11.23 10.81     F2 64 0
20 NAME Hercules Stream MGr ~ ~           ~ 182 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-19:52:13

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