SIMBAD references

2020MNRAS.493.4045J - Mon. Not. R. Astron. Soc., 493, 4045-4057 (2020/April-2)

The ASAS-SN catalogue of variable stars - VII. Contact binaries are different above and below the Kraft break.

JAYASINGHE T., STANEK K.Z., KOCHANEK C.S., SHAPPEE B.J., PINSONNEAULT M.H., HOLOIEN T.W.-S., THOMPSON T.A., PRIETO J.L., PAWLAK M., PEJCHA O., POJMANSKI G., OTERO S., HURST N. and WILL D.

Abstract (from CDS):

We characterize ∼71 200 W Ursae Majoris (UMa) type (EW) contact binaries, including ∼12 600 new discoveries, using All-Sky Automated Survey for SuperNovae (ASAN-SN)V-band all-sky light curves along with archival data from Gaia, 2MASS, AllWISE, LAMOST, GALAH, RAVE, and APOGEE. There is a clean break in the EW period-luminosity relation at log(P/ d)≃-0.30, separating the longer period, early-type EW binaries from the shorter period, late-type systems. The two populations are even more cleanly separated in the space of period and effective temperature, by T_ eff_=6710 K-1760 K log(P/0.5 d). Early-type and late-type EW binaries follow opposite trends in Teff with orbital period. For longer periods, early-type EW binaries are cooler, while late-type systems are hotter. We derive period-luminosity relationships in the WJK, V, Gaia DR2 G, J, H, Ks, and W1 bands for the late-type and early-type EW binaries separated by both period and effective temperature, and by period alone. The dichotomy of contact binaries is almost certainly related to the Kraft break and the related changes in envelope structure, winds, and angular momentum loss.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): catalogues - surveys - binaries: eclipsing

VizieR on-line data: <CDS Catalogue: II/366>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD; there are some issues with cross-identifications or classifications.

CDS comments: The resolution of this survey is 15''. As a consequence the astrometry is poor, usually within 5'', but it can be more than 1 pixel. Thus the identifications in astrometric catalogues and the ingestion in Simbad are quite challenging.

Simbad objects: 21

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