SIMBAD references

2019MNRAS.489.4705J - Mon. Not. R. Astron. Soc., 489, 4705-4711 (2019/November-2)

An extreme amplitude, massive heartbeat system in the LMC characterized using ASAS-SN and TESS.

JAYASINGHE T., STANEK K.Z., KOCHANEK C.S., THOMPSON T.A., SHAPPEE B.J. and FAUSNAUGH M.

Abstract (from CDS):

Using ASAS-SN data, we find that the bright (V∼13.5 mag) variable star MACHO 80.7443.1718 (ASASSN-V J052624.38-684705.6) is the most extreme heartbeat star yet discovered. This massive binary, consisting of at least one early B-type star, has an orbital period of P_ ASAS-SN_=32.83627±0.00846 d, and is located towards the LH58 OB complex in the LMC. Both the ASAS-SN and TESS light curves show extreme brightness variations of ∼40 per cent at periastron and variations of ∼10 per cent due to tidally excited oscillations outside periastron. We fit an analytical model of the variability caused by the tidal distortions at pericentre to find orbital parameters of ω=-61.4^○, i=44.8^○, and e=0.566. We also present a frequency analysis to identify the pulsation frequencies corresponding to the tidally excited oscillations.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: general - stars: early-type - stars: massive - stars: oscillations - stars: variables: general

CDS comments: MACHO 88.7443.1718 is a misprint for MACHO 80.7443.1718.

Simbad objects: 8

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2023.02.04-13:27:15

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