orionlee on 16-Mar-2024 17:02:31 GMT about HD 172779B
Eclipsing binary variability is much more likely to be due to the brighter
HD 172779A
.
The referenced 2021A&A paper attributed the same variability to both objects ( Vizier (https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ65f5c8e331a55&-to=-4b&-from=-3&-this=-4&%2F%2Fsource=J%2FA%2BA%2F652%2FA120%2Feb-cat&%2F%2Ftables=J%2FA%2BA%2F652%2FA120%2Feb-cat&-out.max=50&%2F%2FCDSportal=http%3A%2F%2Fcdsportal.u-strasbg.fr%2FStoreVizierData.html&-out.form=HTML+Table&-out.add=_r&%2F%2Foutaddvalue=default&-sort=_r&-order=I&-oc.form=sexa&-nav=cat%3AJ%2FA%2BA%2F652%2FA120%26tab%3A%7BJ%2FA%2BA%2F652%2FA120%2Feb-cat%7D%26key%3Asource%3DJ%2FA%2BA%2F652%2FA120%2Feb-cat%26pos%3A18+44+23.7307564896+-46+57+27.023857560%28+60+arcsec+J2000%29%26HTTPPRM%3A&-c=18+44+23.7307564896+-46+57+27.023857560&-c.eq=J2000&-c.r=+10&-c.u=arcsec&-c.geom=r&-source=&-out.src=J%2FA%2BA%2F652%2FA120%2Feb-cat&-source=J%2FA%2BA%2F652%2FA120%2Feb-cat&-out=TIC&-out=RAJ2000&-out=DEJ2000&-out=Jmag&-out=Hmag&-out=Kmag&-out=Gmag&-out=Tmag&-out=LumClass&-out=BPmag&-out=RPmag&-out=WDFlag&-out=SimbadOtype&-out=SimbadSptype&-out=tsupcon&-out=eclPer&-out=eclScore&-out=DepthP&-out=DepthS&-out=WidthP&-out=WidthS&-out=tsupconT&-out=eclPerT&-out=FlagS&-out=FlagVar&-out=FlagCont&-out=FlagHeart&-out=dupl-group&-out=Simbad&-meta.ucd=2&-meta=1&-meta.foot=1&-meta.form=1&-usenav=1&-bmark=GET) ).
The primary eclipse's depth is about 20% relative to 172779A. It'd be highly unusual if the eclipses are caused by the fainter 172779B.
HD 172779A is also attributed as the source of the eclipses by:
ASAS3 (https://www.astrouw.edu.pl/cgi-asas/asas_variable/184424-4657.5,asas3,19.2449,-1684.5460,500,0,0)
TESS TCE (https://exo.mast.stsci.edu/exomast_planet.html?planet=TIC181798899S0013S0013TCE1)
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