2020MNRAS.491..690J

Query : 2020MNRAS.491..690J

2020MNRAS.491..690J - Mon. Not. R. Astron. Soc., 491, 690-707 (2020/January-1)

Differential rotation in convective envelopes: constraints from eclipsing binaries.

JERMYN A.S., TAYAR J. and FULLER J.

Abstract (from CDS):

Over time, tides synchronize the rotation periods of stars in a binary system to the orbital period. However, if the star exhibits differential rotation, then only a portion of it can rotate at the orbital period, so the rotation period at the surface may not match the orbital period. The difference between the rotation and orbital periods can therefore be used to infer the extent of the differential rotation. We use a simple parametrization of differential rotation in stars with convective envelopes in circular orbits to predict the difference between the surface rotation period and the orbital period. Comparing this parametrization to observed eclipsing binary systems, we find that in the surface convection zones of stars in short-period binaries there is very little radial differential rotation, with |r[?]rln Ω| < 0.02. This holds even for longer orbital periods, though it is harder to say which systems are synchronized at long periods, and larger differential rotation is degenerate with asynchronous rotation.

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

Journal keyword(s): convection - binaries: eclipsing - stars: rotation

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Kepler-56 RG* 19 35 02.0011980936 +41 52 18.692360400   13.954 12.756 12.379   ~ 210 1

Query : 2020MNRAS.491..690J

Basic data :
Kepler-56 -- Red Giant Branch star
Other object types: otypes_help 		* (2009yCat,UCAC4,...), RG* (2017MNRAS), Er* (2021AJ), Ro* (2018MNRAS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		19 35 02.0011980936 +41 52 18.692360400 (Optical) [ 0.0093 0.0104 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 33 23.0384647739 +41 45 38.853661176 [ 0.0093 0.0104 90 ]
Gal coord. (ep=J2000) : 		074.9256254613585 +10.3144106985609 [ 0.0093 0.0104 90 ]
Proper motions mas/yr : 		-6.596 -12.081 [0.012 0.013 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -53.740601 [0.002672] / z(spectroscopic) -0.000179 [0.000000] / cz -53.74 [0.00]
   (NIR) A 2020AJ....160..120J
Parallaxes (mas): 		1.0755 [0.0118] A 2020yCat.1350....0G
Fluxes (10) :
B 13.954 [0.02] D 2012yCat.1322....0Z
V 12.756 [0.03] D 2012yCat.1322....0Z
R 12.379 [0.04] D 2012yCat.1322....0Z
G 12.421128 [0.002759] C 2020yCat.1350....0G
J 10.813 [0.020] C 2003yCat.2246....0C
H 10.330 [0.020] C 2003yCat.2246....0C
K 10.227 [0.018] C 2003yCat.2246....0C
g 13.328 [0.03] D 2012yCat.1322....0Z
r 12.381 [0.05] D 2012yCat.1322....0Z
i 12.111 [0.06] D 2012yCat.1322....0Z
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notes:

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 3 		Display criteria :

Identifiers (10) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

UCAC4 660-075583 KIC 6448890 SPOCS 3595 Gaia DR2 2077617930392844800
AP J19350200+4152187 KOI-1241 TIC 138430034
Kepler-56 2MASS J19350200+4152187 Gaia DR3 2077617930392844800

References (210 between 1850 and 2026) (Total 210)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 6    Diameter : 1    Distance : 3    Var : 1    Rot : 5    Fe/H : 21    Plx : 2    PM : 2   

   

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Link by name to the catalogue in VizieR :

UCAC4 660-075583 AP J19350200+4152187 KIC 6448890 2MASS J19350200+4152187 Gaia DR3 2077617930392844800
Gaia DR2 2077617930392844800

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