2019ApJ...887L...1B

Query : 2019ApJ...887L...1B

2019ApJ...887L...1B - Astrophys. J., 887, L1-L1 (2019/December-2)

Asteroseismic constraints on the cosmic-time variation of the gravitational constant from an ancient main-sequence star.

BELLINGER E.P. and CHRISTENSEN-DALSGAARD J.

Abstract (from CDS):

We investigate the variation of the gravitational constant G over the history of the universe by modeling the effects on the evolution and asteroseismology of the low-mass star KIC 7970740, which is one of the oldest (∼11 Gyr) and best-observed solar-like oscillators in the Galaxy. From these data we find {dot}G/G=(2.1±2.9)×10^–12yr^–1, that is, no evidence for any variation in G. We also find a Bayesian asteroseismic estimate of the age of the universe as well as astrophysical S-factors for five nuclear reactions obtained through a 12-dimensional stellar evolution Markov Chain Monte Carlo simulation.

Journal keyword(s): Asteroseismology - Stellar astronomy - Fundamental parameters of stars - Stellar ages - Gravitation - Stellar physics - Non-standard theories of gravity - Stellar evolutionary models - Stellar evolution - Stellar evolutionary tracks - Stellar oscillations - Main sequence stars

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	HD 186306	Em*	19 41 45.6454247760	+43 44 51.716276232		8.70	7.96			G9V	75	0

Query : 2019ApJ...887L...1B

Basic data :

HD 186306 -- Emission-line Star

* (2013MNRAS,HD,...), Em* (2023ApJS), PM* (2016A&A), NIR (2MASS), Opt (LAMOST)

19 41 45.6454247760 +43 44 51.716276232 (Optical) [ 0.0164 0.0157 90 ] A 2020yCat.1350....0G

19 40 09.3529856298 +43 37 40.644314220 [ 0.0164 0.0157 90 ]

077.1958438938150 +10.0942607335775 [ 0.0164 0.0157 90 ]

50.702 75.325 [0.021 0.019 90] A 2020yCat.1350....0G

V(km/s) -60.31 [0.16] / z(spectroscopic) -0.000201 [0.000001] / cz -60.30 [0.16] (Opt) A 2018yCat.1345....0G

36.6224 [0.0181] A 2020yCat.1350....0G

G9V C 2013MNRAS.434.1422M

B 8.70 [0.02] D 2000A&A...355L..27H

V 7.96 [0.01] D 2000A&A...355L..27H

G 7.762319 [0.002762] C 2020yCat.1350....0G

J 6.517 [0.023] C 2003yCat.2246....0C

H 6.161 [0.023] C 2003yCat.2246....0C

K 6.085 [0.018] C 2003yCat.2246....0C

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`HD 186306`	`KIC 7970740`	`SPOCS 2386`	`Gaia DR3 2078105327586616704`
`AG+43 1709`	`LAMOST J194145.64+434451.5`	`SPOCS 3102`	`Gaia DR1 2078105323280815360`
`BD+43 3325`	`2MASS J19414564+4344515`	`TIC 271668882`	`Gaia DR2 2078105327586616704`
`GEN# +1.00186306`	`PPM 58702`	`TYC 3148-1740-1`
`GSC 03148-01740`	`SAO 48735`	`uvby98 100186306`

References (75 between 1850 and 2026) (Total 75)
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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`HD 186306`	`AG+43 1709`	`BD+43 3325`	`GSC 03148-01740`	`KIC 7970740`
`2MASS J19414564+4344515`	`PPM 58702`	`SAO 48735`	`TYC 3148-1740-1`	`uvby98 100186306`
`Gaia DR3 2078105327586616704`	`Gaia DR1 2078105323280815360`	`Gaia DR2 2078105327586616704`

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