2003A&A...400..271R

Query : 2003A&A...400..271R

2003A&A...400..271R - Astronomy and Astrophysics, volume 400271-277 (2003/3-2)

The rotational velocity of the sdOB primary of the eclipsing binary system LB 3459 (AA Dor).

RAUCH T. and WERNER K.

Abstract (from CDS):

We present an analysis of the rotational velocity of the primary of LB 3459 based on 107 new high-resolution and high-S/N ESO VLT UVES spectra. 105 of them cover a complete orbital period (0.26d) of this binary system. We have determined an orbital period of P=22600.702±0.005s, a radial velocity amplitude of A1=39.19±0.05km/s, and T0=2451917.152690±0.000005. From simulations of the He II λ 4686Å line profile (based on NLTE model atmosphere calculations), we derive vrot=47±5km/s. We present an animation which shows the orbital movement of the binary system, its synthetic lightcurve, and compares the phase-dependent variation of the predicted with the observed He II λ 4686Å line profile. The radius of the cool component is almost the same size like Jupiter but its mass is about 70 times higher than Jupiter's mass. Thus, from its present mass (M2=0.066M☉), the secondary of LB 3459 lies formally within the brown-dwarf mass range (0.013-0.08M☉). It might be a former planet which has survived the previous common-envelope phase and even has gained mass.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: eclipsing - stars: fundamental parameters - stars: individual: LB 3459 - stars: individual: AA Dor - stars: low-mass, brown dwarfs - 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 HD 269696 HS* 05 31 40.3594532592 -69 53 02.153902236 9.74 10.92 11.15     sdB+dM 202 0

Query : 2003A&A...400..271R

Basic data :
HD 269696 -- Hot Subdwarf
Other object types: otypes_help 		* (2021MNRAS,HD,...), SB* (2004A&A,SBC9), blu (2019A&A,LB), HS* (2012MNRAS), EB* (2022yCat), ** (2012MNRAS), PM* (2018yCat), V* (V*), NIR (2MASS), MIR (SSTISAGEMC)
ICRS coord. (ep=J2000) : 		05 31 40.3594532592 -69 53 02.153902236 (Optical) [ 0.0403 0.0429 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		05 32 08.0122465251 -69 55 07.386687571 [ 0.0403 0.0429 90 ]
Gal coord. (ep=J2000) : 		280.4757156277878 -32.1786693227314 [ 0.0403 0.0429 90 ]
Proper motions mas/yr : 		-11.972 50.781 [0.050 0.057 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 1.57 [0.09] / z(~) 0.000005 [0.000000] / cz 1.57 [0.09]
   A 2015A&A...576A..44K
Parallaxes (mas): 		2.838 [0.0441] A 2020yCat.1350....0G
Spectral type: 		sdB+dM C 2012MNRAS.423..478A
Fluxes (7) :
U 9.74 [~] D 2003AJ....125.2531R
B 10.92 [0.05] D 2000A&A...355L..27H
V 11.15 [0.09] D 2000A&A...355L..27H
G 11.099821 [0.003383] C 2020yCat.1350....0G
J 11.795 [0.028] C 2003yCat.2246....0C
H 11.965 [0.029] C 2003yCat.2246....0C
K 12.046 [0.029] C 2003yCat.2246....0C
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Identifiers (29) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 269696 GSC 09166-00716 RMC 69F uvby98 100269696
ALS 16654 JP11 3753 SBC9 346 V* AA Dor
CPC 21.1 827 LB 3459 SSTISAGEMC J053140.34-695301.9 WEB 5031
CPD-69 389 2MASS J05314035-6953021 TIC 425064757 Gaia DR2 4657996005080302720
GALAH 170108002201071 PLX 1287.02 TYC 9166-716-1 Gaia DR3 4657996005080302720
GCRV 24307 PPM 354816 UBV 5640
GEN# +1.00269696 PV 1137 UBV M 28743
GEN# +6.00003459 Renson 10020 UBV M 42301

References (202 between 1850 and 2026) (Total 202)
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 : 4    Distance : 2    Var : 5    Rot : 1    Fe/H : 5    Plx : 2    PM : 2    SpT : 3   

   

Observing logs
IUE : 2   

   

External archives :

Link by name to the catalogue in VizieR :

HD 269696 ALS 16654 CPD-69 389 GALAH 170108002201071 GSC 09166-00716
2MASS J05314035-6953021 PPM 354816 SSTISAGEMC J053140.34-695301.9 TYC 9166-716-1 uvby98 100269696
V* AA Dor Gaia DR2 4657996005080302720 Gaia DR3 4657996005080302720

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