2004A&A...417..689D

Query : 2004A&A...417..689D

2004A&A...417..689D - Astronomy and Astrophysics, volume 417689-693 (2004/4-2)

IO Aqr: Twins just at turn off?

DIMITROV W., KOLEV D. and SCHWARZENBERG-CZERNY A.

Abstract (from CDS):

We present photometric and spectroscopic analysis of the eclipsing binary IO Aqr with orbital period 2.37d. The system is detached, with similar almost spherical components. The star is classified as G0 spectral type. In the analysis we have used spectra obtained at a 2-m telescope with a Coude spectrograph for two regions NaD and H_α, as well as ASAS I band photometry and R, V photometry obtained at a 0.4m telescope. The model of the star was obtained using a code based on the Wilson-Devinney method. The radii of the stars for our best fit are R₁=2.09±0.13R_☉ and R₂=2.54±0.06R_☉ while the masses of the components are M₁=1.53±0.02M_☉ and M₂=1.64±0.02M_☉. Both components are slightly evolved main sequence stars.

Abstract Copyright: ∼

Journal keyword(s): eclipsing binaries - binaries: spectroscopic - stars: individual: IO Aqr

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	V* IO Aqr	EB*	20 40 45.4694967096	+00 56 21.006276900		9.34	8.86			F5V	35	0

Query : 2004A&A...417..689D

Basic data :

V* IO Aqr -- Eclipsing Binary

* (HD,AG,...), V* (1SWASP,V*), EB* (2022yCat), NIR (2MASS)

20 40 45.4694967096 +00 56 21.006276900 (Optical) [ 0.0167 0.0108 90 ] A 2020yCat.1350....0G

20 38 12.4656198070 +00 45 39.744854924 [ 0.0167 0.0108 90 ]

047.0800518619328 -23.6455565133326 [ 0.0167 0.0108 90 ]

-4.221 -25.058 [0.021 0.015 90] A 2020yCat.1350....0G

V(km/s) 124.90 [0.9] / z(~) 0.000417 [0.000003] / cz 124.93 [0.90] A 2006AstL...32..759G

3.9926 [0.0215] A 2020yCat.1350....0G

F5V C 1999MSS...C05....0H

B 9.34 [0.02] D 2000A&A...355L..27H

V 8.86 [0.02] D 2000A&A...355L..27H

G 8.695985 [0.002832] C 2022yCat.1355....0G

J 7.830 [0.029] C 2003yCat.2246....0C

H 7.646 [0.024] C 2003yCat.2246....0C

K 7.555 [0.033] C 2003yCat.2246....0C

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`HD 196991`	`HIC 102041`	`SRS 16299`	`YZ 0 5240`
`AG+00 2558`	`HIP 102041`	`1SWASP J204045.47+005621.0`	`Gaia DR2 4231287675625475840`
`AGKR 18490`	`2MASS J20404547+0056209`	`TIC 466812924`	`Gaia DR3 4231287675625475840`
`BD+00 4569`	`PPM 170512`	`TYC 511-960-1`	`Gaia DR1 4231287671329126784`
`GSC 00511-00960`	`SAO 126097`	*`V IO Aqr`**

References (35 between 1850 and 2026) (Total 35)
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 196991`	`AG+00 2558`	`BD+00 4569`	`GSC 00511-00960`	`HIC 102041`
`HIP 102041`	`2MASS J20404547+0056209`	`PPM 170512`	`SAO 126097`	`TYC 511-960-1`
*`V IO Aqr`**	`Gaia DR2 4231287675625475840`	`Gaia DR3 4231287675625475840`	`Gaia DR1 4231287671329126784`

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