2013A&A...559A..41Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST07:41:13

2013A&A...559A..41Z - Astronomy and Astrophysics, volume 559A, 41-41 (2013/11-1)

The first analysis of extragalactic binary-orbit precession.

ZASCHE P. and WOLF M.

Abstract (from CDS):

The main aim of the present paper is the very first analysis of the binary-orbit precession out of our Galaxy. The light curves of an eclipsing binary MACHO 82.8043.171 in the Large Magellanic cloud (LMC) were studied in order to analyse the long-term evolution of its orbit. It is a detached system that is undergoing rapid orbit precession. The inclination of the orbit towards the observer has been changing, which has caused the eclipse depth to become lower over the past decade, and this is ongoing. The period of this effect was derived as only about 77 years, so it is the second fastest nodal motion known amongst such systems nowadays. This is the first analysis of an extragalactic binary with nodal precession. This effect is probably caused by a distant third body orbiting the pair, which could potentially be detected via spectroscopy. Some preliminary estimates of this body are presented. However, even such a result can tell us something about the multiplicity fraction in other galaxies.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - stars: fundamental parameters - stars: individual: MACHO 82.8043.171

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 - 2020
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9446 1
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14832 1
4 OGLE LMC-ECL-17359 EB* 05 29 46.194 -69 08 28.58   17.15 16.988 16.99 17.018 ~ 7 0
5 V* HS Hya Al* 10 24 36.7671181066 -19 05 32.957289219   8.53 8.12     F5V 102 0
6 V* V907 Sco Al* 17 56 55.5620526460 -34 45 01.223170194   8.75 8.63     B9V 45 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-07:41:13

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