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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10423661" target="_blank" >RIV/00216208:11320/20:10423661 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VjMtP86gv0" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=VjMtP86gv0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/staa518" target="_blank" >10.1093/mnras/staa518</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

We characterize similar to 71 200 W Ursae Majoris (UMa) type (EW) contact binaries, including similar to 12600 new discoveries, using All-Sky Automated Survey for SuperNovae (ASAN-SN) Vband all-sky light curves along with archival data from Gaia, 2MASS, Al1WISE, LAMOST, GALAH, RAVE, and APOGEE. There is a clean break in the EW period luminosity relation at log(P/d)similar or equal to-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 LW binaries follow opposite trends in T-eff 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 W-JK, V, Gaia 1)R2 G, J. H, K-s, and W-1 bands for the late-type and early-type LW 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

We characterize similar to 71 200 W Ursae Majoris (UMa) type (EW) contact binaries, including similar to 12600 new discoveries, using All-Sky Automated Survey for SuperNovae (ASAN-SN) Vband all-sky light curves along with archival data from Gaia, 2MASS, Al1WISE, LAMOST, GALAH, RAVE, and APOGEE. There is a clean break in the EW period luminosity relation at log(P/d)similar or equal to-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 LW binaries follow opposite trends in T-eff 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 W-JK, V, Gaia 1)R2 G, J. H, K-s, and W-1 bands for the late-type and early-type LW 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/LTAUSA18093" target="_blank" >LTAUSA18093: Časová proměnnost v astronomii: účast v projektu All-Sky Automated Survey for Supernovae</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

493

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

4045-4057

Kód UT WoS článku

000526035600071

EID výsledku v databázi Scopus

2-s2.0-85085388952