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


Query : 2011A&A...526A..29H

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 - 2022
#notes
1 Cl* NGC 104 WSB V69 EB* 00 22 52.951 -72 03 40.68           ~ 24 0
2 LP 349-48 PM* 00 35 34.7743251456 +27 08 41.310795300   16.3   14.1   ~ 4 0
3 1RXS J045304.1-070011 EB* 04 53 04.4274771144 -07 00 23.506395984   11.99 11.13   10.284 K2V+K4/M4V 21 0
4 V* HS Aur EB* 06 51 18.4766820936 +47 40 24.176766540   10.85 10.05     G5(N) 86 0
5 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 840 0
6 BD-15 2429 EB* 08 25 51.6016571448 -16 22 47.247090456   11.45 10.29 9.73 9.36 K7V+M0/2:V 45 0
7 V* CU Cnc SB* 08 31 37.5741841080 +19 23 39.398029332   12.83 11.809 11.592   M5Ve 211 0
8 [MLF2014] 337529 RR* 13 26 17.2590081384 -47 23 17.168879292 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     ~ 3252 0
10 Cl* NGC 5139 SAW V212 EB* 13 27 21.71 -47 23 33.2 17.654 17.884 17.262 16.778 16.370 ~ 37 0
11 LP 133-373 EB* 14 04 08.8829131392 +50 20 38.642975844   16.3   15.2   ~ 19 0
12 V* GU Boo EB* 15 21 54.8243257728 +33 56 09.067285032     13.11     M0/M1.5 91 0
13 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 425 0
14 [LPC2009] 21480 RG* 17 40 40.32 -53 41 25.3   16.68 16.103     ~ 7 0
15 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1885 1
16 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13091 0
17 BD+34 4217 EB* 20 58 13.4532832464 +35 10 29.672620140     10.13     G9.5Ve+K3Ve 259 0
18 BD-22 5866 SB* 22 14 38.3705936256 -21 41 53.188190988   11.72 10.428 10.137 8.606 M0Ve 40 1
19 V* RW Lac EB* 22 44 57.1033105152 +49 39 27.512902116   11.23 10.81     F2 71 0
20 NAME Hercules Stream MGr ~ ~           ~ 209 0

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2022.08.10-20:12:15

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