2012MNRAS.419.3447M

Query : 2012MNRAS.419.3447M

2012MNRAS.419.3447M - Mon. Not. R. Astron. Soc., 419, 3447-3456 (2012/February-1)

Precession due to a close binary system: an alternative explanation for ν-Octantis?

MORAIS M.H.M. and CORREIA A.C.M.

Abstract (from CDS):

We model the secular evolution of a star's orbit when it has a nearby binary system. We assume a hierarchical triple system where the inter-binary distance is small in comparison with the distance to the star. We show that the major secular effect is precession of the star's orbit around the binary system's centre of mass. We explain how we can obtain this precession rate from the star's radial velocity data, and thus infer the binary system's parameters. We show that the secular effect of a nearby binary system on the star's radial velocity can sometimes mimic a planet. We analyse the radial velocity data for ν-Octantis A which has a nearby companion (ν-Octantis B) and we obtain retrograde precession of -0°86±0°02/yr. We show that if ν-Octantis B was itself a double star, it could mimic a signal with similarities to that previously identified as a planet of ν-Octantis A. Nevertheless, we need more observations in order to decide in favour of the double-star hypothesis.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): methods: analytical - techniques: radial velocities - celestial mechanics - planets and satellites: detection - planets and satellites: dynamical evolution and stability - binaries: spectroscopic

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 * nu. Oct SB* 21 41 28.5420355132 -77 23 24.031541832   4.745 3.728 5.46   K1III 131 1

Query : 2012MNRAS.419.3447M

Basic data :
* nu. Oct -- Spectroscopic Binary
Other object types: otypes_help 		* (HD,*,...), ** (**,CCDM,...), SB* (SBC7,SBC9), PM* (LTT,NLTT), MIR (WISEA,WISE), UV (TD1), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		21 41 28.5420355132 -77 23 24.031541832 (Optical) [ 0.7223 0.5818 90 ] A 2018yCat.1345....0G
FK4 coord. (ep=B1950 eq=1950) : 		21 35 59.4073873770 -77 36 49.552805181 [ 0.7223 0.5818 90 ]
Gal coord. (ep=J2000) : 		314.2887563227073 -35.1888451202872 [ 0.7223 0.5818 90 ]
Proper motions mas/yr : 		68.656 -250.044 [1.598 1.203 90] A 2018yCat.1345....0G
Radial velocity / Redshift / cz : 		V(km/s) 34.4 [0.9] / z(~) 0.000115 [0.000003] / cz 34.40 [0.90]
   E 1953GCRV..C......0W
Parallaxes (mas): 		51.5172 [0.6525] A 2018yCat.1345....0G
Spectral type: 		K1III C 2006AJ....132..161G
Fluxes (7) :
B 4.745 [0.014] D 2000A&A...355L..27H
V 3.728 [0.009] D 2000A&A...355L..27H
R 5.46 [0.31] E 2012yCat.1322....0Z
G 3.473232 [0.002963] C 2020yCat.1350....0G
J 2.014 [0.274] D 2003yCat.2246....0C
H 1.536 [0.238] D 2003yCat.2246....0C
K 1.46 [0.31] D 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 		Display criteria :

Identifiers (41) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 205478 GEN# +1.00205478 PLX 5201 UBV M 25800
* nu. Oct GJ 835.1 PLX 5201.00 UCAC4 064-030323
** BLM 6 GJ 9744 PPM 375094 WDS J21415-7723AB
CCDM J21415-7723AB HIC 107089 SAO 257948 WEB 19344
CD-77 1079 HIP 107089 SBC7 862 WISEA J214128.72-772326.7
CNS5 5340 HR 8254 SBC9 1315 WISE J214128.71-772326.5
CPC 21.3 2675 IRAS 21360-7736 SKY# 41346 Gaia DR3 6356375508718385024
CPD-77 1510 LTT 8619 TD1 28250 Gaia DR2 6356375508717699584
FK5 810 2MASS J21412863-7723243 TIC 352542468
GC 30289 N30 4773 TYC 9478-1483-1
GCRV 13593 NLTT 51726 UBV 18562

References (131 between 1850 and 2026) (Total 131)
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 : 12    Distance : 1    Fe/H : 5    Plx : 5    PM : 6    SpT : 4   

   

Observing logs
IUE : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * nu. Oct

Link by name to the catalogue in VizieR :

HD 205478 CCDM J21415-7723AB CD-77 1079 CPD-77 1510 FK5 810
GJ 835.1 GJ 9744 HIC 107089 HIP 107089 HR 8254
IRAS 21360-7736 2MASS J21412863-7723243 NLTT 51726 PLX 5201 PPM 375094
SAO 257948 TD1 28250 TYC 9478-1483-1 UCAC4 064-030323 WDS J21415-7723AB
WISEA J214128.72-772326.7 WISE J214128.71-772326.5 Gaia DR3 6356375508718385024 Gaia DR2 6356375508717699584

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